DAYS 1-5 (SEPTEMBER 14-18)

A weak area of high pressure to the north today is enough to provide some nice weather. The warm front approaching from the southwest doesn’t have a solid area of cloudiness with it, instead being the focus of clusters of showers and thunderstorms in a fairly narrow zone southwest of New England. This frontal boundary will move across our region overnight / early Wednesday with the chance of a few showers and a thunderstorm along it, but not a solid area of rainfall. It will introduce a gusty southwesterly wind and high humidity for Wednesday, a day that will have the feel of summer with a sun/cloud mix. A cold front approaching from the northwest parented by low pressure moving eastward to our north will be timed late enough that I still think we escape a severe weather threat. We likely see general showers and thunderstorms moving in Wednesday night, in weakening form, that had been much stronger to the west during the day. The frontal boundary will then slog its way across the WHW forecast area early Thursday with additional showers possible, and while the boundary itself never gets that far beyond us, we may see enough dry air work in for some partial improvement Thursday afternoon. It’s at that time our attention will turn to low pressure to the south. While this system may become a tropical depression or even minimal tropical storm, it doesn’t concern me just for being a potential tropical entity, as it doesn’t look like it would turn into a formidable system with wind and torrential rainfall. However, it will contain tropical moisture, and its track should be close enough to at least bring some rainfall into the region during Friday. There are still some differences of output across models as to how much rain gets in here and with the track of the system itself, and also its speed of movement. I remain optimistic at this time that it does move far enough to the north, and far enough to the east, that drier air is drawn into our region as early as Saturday for improving weather in time for the weekend, but a slower and/or further west system would change this outlook, so it’s low confidence at the time.

TODAY: Mostly sunny to partly cloudy. Highs 70-77. Wind variable to E up to 10 MPH.

TONIGHT: Partly to mostly cloudy. Chance of a shower or thunderstorm overnight. Lows 60-67. Wind SE up to 10 MPH shifting to SW.

WEDNESDAY: Partly sunny. Highs 78-85. Humid – dew point upper 60s. Wind SW 10-20 MPH, higher gusts.

WEDNESDAY NIGHT: Variably cloudy. Chance of showers/thunderstorms. Lows 63-70. Wind SW 5-15 MPH becoming variable.

THURSDAY: Mostly cloudy. Chance of showers especially in the morning. Highs 70-77. Wind variable 5-15 MPH becoming NE.

THURSDAY NIGHT: Partly to mostly cloudy. Lows 58-65. Wind NE to E up to 10 MPH.

FRIDAY: Cloudy. Chance of rain. Highs 67-74. Wind E 5-15 MPH.

FRIDAY NIGHT: Cloudy. Chance of rain evening. Areas of fog. Lows 58-65. Wind E to NE 5-15 MPH.

SATURDAY: Mostly cloudy to partly sunny. Highs 66-73. Wind NE to N 5-15 MPH.

DAYS 6-10 (SEPTEMBER 19-23)

High pressure builds in with a dry stretch of weather early to mid period, along with a warming trend. A trough and frontal system from the west brings the chance of unsettled weather back by later in the period.

DAYS 11-15 (SEPTEMBER 24-28)

General west-to-east flow resumes with up and down temperatures and limited shower chances but still need to watch the western tropical Atlantic for potentially putting a system somewhere near or off the East Coast.

C-19 Chat Post – September 14 2021

DAYS 1-5 (SEPTEMBER 13-17)

An unsettled stretch of weather is at hand. This part of the forecast is a little more pessimistic sounding than I had been during the last few updates. First, the pre-dawn hours today featured a fast-moving batch of thunderstorms crossing southern NH and northern MA from west to east, a little complex of storms that was fairly well-forecast by short-range guidance. The last little hang back tail, a small meso-scale low pressure area, is crossing Metro Boston as of 7 a.m. in the form of showers and a couple downpours, but this will all be offshore very soon and other than one additional shower or two coming eastward across similar areas into mid morning, today is going to feature improvement and a nice afternoon. The small bubble of high pressure bringing the drier air in will be centered to our north as it moves to the east and the wind will shift to the east Tuesday ahead of an approaching warm front, with more clouds returning. This warm front brings the chance of showers Tuesday night and introduces warm and humid air to the region for Wednesday, a day we’ll have to watch for a shower and thunderstorm threat as a cold front approaches. I still feel the timing of this front may be late enough that we may escape the potential for stronger storms as the activity will arrive during the evening and night, but it will be something to keep an eye on. Different from my previous forecast is a more unsettled look for Thursday and Friday as the front doesn’t really get that far to the south and east before coming to a halt, and the low pressure area that I alluded to for next weekend is expected to organize and have an impact sooner than that on Friday, so lots of clouds and occasional wet weather can be expected later in the week as well, with the wettest day expected to be Friday as it stands now.

TODAY: Mostly cloudy start with additional showers especially MA and southern NH into mid morning, then sun and passing clouds. Highs 72-79. Wind variable becoming NW 5-15 MPH.

TONIGHT: Mostly clear. Fog patches in lower elevations. Lows 55-62. Wind NW under 10 MPH becoming variable.

TUESDAY: Sunshine followed by increasing clouds. Highs 68-75. Wind variable becoming E up to 10 MPH.

TUESDAY NIGHT: Cloudy. Chance of showers. Lows 58-65. Wind SE up to 10 MPH.

WEDNESDAY: Partly sunny. Highs 78-85. Humid – dew point upper 60s. Wind SW 10-20 MPH.

WEDNESDAY NIGHT: Variably cloudy. Chance of showers/thunderstorms. Lows 63-70. Wind SW 5-15 MPH becoming variable.

THURSDAY: Mostly cloudy. Chance of showers. Highs 70-77. Wind variable 5-15 MPH.

THURSDAY NIGHT: Mostly cloudy. Showers likely. Patchy fog. Lows 60-67. Wind variable to E 5-15 MPH.

FRIDAY: Cloudy. Chance of rain. Highs 67-74. Wind E 5-15 MPH.

DAYS 6-10 (SEPTEMBER 18-22)

With the earlier arrival of low pressure and things not too bogged down I am a little more optimistic today about the weather for next weekend (September 18-19) with improving conditions. After that high pressure may park off the Atlantic Coast for a warmer interlude while we again watch moisture to the south, but this is a very low confidence forecast.

DAYS 11-15 (SEPTEMBER 23-27)

General west-to-east flow resumes with up and down temperatures and limited shower chances but still need to watch the western tropical Atlantic for potentially putting a system somewhere near or off the East Coast.

C-19 Chat Post – September 13 2021

DAYS 1-5 (SEPTEMBER 12-16)

No big changes to the discussion today. In the very short term, we have another great late summer day today. Ocean swells / surf continue to settle down at the beaches, while we get to enjoy plenty of sun and warm mid September air, albeit with a little increase in humidity, but below oppressive levels. A plume of wildfire smoke has entered the region and will filter the sun today, along with some patches of clouds. A cold front approaches from the northwest this evening and an initial push of showers will likely dissipate as it moves toward the WHW forecast area, with maybe a few getting into southwestern NH or central MA this evening. But a stronger push of energy will be coming along in the form of a mesoscale convective system (MCS) which will race into southern New England, probably in weakening form, but still likely formidable, during the late evening and especially overnight hours. It remains to be seen where the strongest part(s) of this system, in terms of heaviest showers/thunderstorms will track. It will basically come down to radar watching. But keep in mind that any area is vulnerable to a period of heavy rain and potentially damaging wind sometime between midnight and dawn. This all should be out of here by first thing in the morning, by sunrise or shortly thereafter, other than some cloudiness and perhaps a lingering shower in eastern and southern areas. Monday ends up as a fairly nice day, not as warm as today but still nice, with lower humidity, sunshine and passing clouds. High pressure moves over the region Monday night with light wind and cooler air, but the center of this high being to the north of the region into Tuesday will allow the wind to start coming in from the east and we will have a sunny start but a cloudier finish as a warm front approaches from the west. This warm front will cross the region Tuesday night with increased humidity and a threat of showers, opening the door to warm and humid weather Wednesday after that warm front passes and before a cold front arrives. Current timing of the cold front still makes it look like a late evening or overnight (early Thursday) passage, so there will likely be a limited chance of showers and thunderstorms with it. A little wave of low pressure forming on the front may prolong the cloudiness and shower threat Thursday morning, but trend should be drier as high pressure in eastern Canada gets a bit closer to the region.

TODAY: Sun/clouds/smoke. More humid – dew point into 60s. Highs 77-84. Wind S 5-15 MPH, gusts over 20 MPH.

TONIGHT: Partly cloudy evening with a slight chance of a shower southwestern NH and central MA. Mostly cloudy overnight with showers and thunderstorms likely, some of which may produce heavy rain and strong wind gusts.. Humid – dew point in 60s. Lows 65-72. Wind SW 5-15 MPH, higher gusts possible.

MONDAY: Partly sunny. Chance of a shower in the morning favoring eastern MA and RI. Highs 70-77. Wind NW 5-15 MPH.

MONDAY NIGHT: Mostly clear. Lows 50-57. Wind N up to 10 MPH.

TUESDAY: Mostly sunny start, mostly cloudy finish. Highs 70-77. Wind E up to 10 MPH.

TUESDAY NIGHT: Mostly cloudy. Chance of showers. Patchy fog. Lows 60-67. Wind 5-15 MPH.

WEDNESDAY: Partly cloudy. Humid – dew point 60s to 70. Highs 80-87. Wind SW 10-20 MPH.

WEDNESDAY NIGHT: Variably cloudy. Chance of a passing shower or thunderstorm. Humid – dew point 60s. Lows 65-72. Wind SW 5-15 MPH.

THURSDAY: Variably cloudy with a chance of showers during the morning. Mostly sunny in the afternoon. Drying. Highs 73-80. Wind NW to N 5-15 MPH.

DAYS 6-10 (SEPTEMBER 17-21)

Weaker west-to-east flow. High pressure should shift from north of the region to east of the region with fair weather and a warming trend the first couple days of the period. Mid period we need to watch low pressure to the south which may make a run at the region with a shower or rain threat and also may miss to the southeast. A frontal boundary should also move through from the west about September 20 with a push of drier air to end the period.

DAYS 11-15 (SEPTEMBER 22-26)

The general weather patter should still favor west to east flow but with the jet stream fairly far north we remain vulnerable to tropical moisture from the south should the set-up draw it northward again.

C-19 Chat Post – September 12 2021

DAYS 1-5 (SEPTEMBER 11-15)

First, I need to mention that despite the fact that the large swells and rough surf are settling down in the wake of Larry’s far offshore passage, there is still enough around to result in enhanced rip current risks at the beaches this weekend, especially today, so keep that in mind if making a late summer beach visit! Otherwise, a great weekend as high pressure slides just to the south of New England then off the Mid Atlantic Coast, keeping all of today dry and the daylight and early evening hours of Sunday rain-free as it turns a bit more humid. A cold front approaches Sunday night and moves across the region from northwest to southeast late at night, at which time we will also eye the remnants of a mesoscale convective system (MCS) coming out of the Great Lakes region. The remnants of this system may move through with a batch of showers and thunderstorms during the late night Sunday / early morning Monday time frame, so we’ll have to keep an eye on it for the possibility of at least briefly heavy rainfall and gusty wind. These systems can be rather fickle and hard to pin-point in track even just a day or so in advance, as it hasn’t even formed yet, but is indicated strongly by short range guidance. Regardless, the frontal boundary will clear the region Monday morning with improved weather during the day Monday, and fair weather lasting through most of Tuesday as a small bubble of high pressure moves across the region. The front that went by early Monday will then return as a warm front moving across the region from southwest to northeast Tuesday night with a shower threat from it, then we will find ourselves in a warm and more humid southwesterly air flow for the day on Wednesday with the feel of summer back in the picture. Low pressure moving eastward to the north of the region will drag a cold front through on Wednesday night when there is the chance of a shower or thunderstorm once again.

TODAY: Sunny. Highs 72-79. Wind calm then W to SW up to 10 MPH.

TONIGHT: Clear. Lows 53-60. Wind SW up to 10 MPH.

SUNDAY: Sunny. More humid – dew point into 60s. Highs 77-84. Wind S 5-15 MPH.

SUNDAY NIGHT: Partly cloudy evening. Mostly cloudy with a chance of showers and thunderstorms overnight. Humid – dew point in 60s. Lows 65-72. Wind SW 5-15 MPH, higher gusts possible.

MONDAY: Partly sunny. Chance of a shower in the morning favoring the South Coast. Highs 70-77. Wind NW 5-15 MPH.

MONDAY NIGHT: Mostly clear. Lows 50-57. Wind N up to 10 MPH.

TUESDAY: Partly sunny. Highs 70-77. Wind E up to 10 MPH.

TUESDAY NIGHT: Mostly cloudy. Chance of showers. Patchy fog. Lows 60-67. Wind 5-15 MPH.

WEDNESDAY: Partly cloudy. Chance of a shower or thunderstorm evening or night. Humid – dew point 60s to 70. Highs 80-87. Wind SW 10-20 MPH.

DAYS 6-10 (SEPTEMBER 16-20)

While the overall flow pattern will continue to be west to east, it weakens, and timing and strength of systems becomes a little uncertain. We’ll also have to watch a low pressure area, potentially of tropical origin, from mid to late period. Current idea is that a bubble of high pressure moves in with fair weather September 16-18, starting drier then turning more humid, then shower/rain chances increase toward the September 19-20 weekend with low pressure or at least some tropical moisture moving up from the south. Adjustments will likely be needed.

DAYS 11-15 (SEPTEMBER 21-25)

The general weather patter should still favor west to east flow but with the jet stream fairly far north we remain vulnerable to tropical moisture from the south should the set-up draw it northward. I do think we will get on push of dry Canadian air sometime early to mid period.

C-19 Chat Post – September 11 2021

DAYS 1-5 (SEPTEMBER 10-14)

The slow-moving front that brought us our muggy and showery weather yesterday is offshore, and drier air will move in today, but an upper level disturbance combined with the sun’s heating of the ground and lower atmosphere, and leftover moisture there, will cause clouds to pop up, a few of which may build enough to release isolated showers this afternoon. Other than that, it will be a nice day today. However I do need to remind anybody with plans that include being near the coast or in the coastal waters that large ocean swells, rough surf, and rip currents will be an issue today into the start of the weekend as a result of offshore Hurricane Larry. These conditions will improve later in the weekend. The weekend itself will feature great weather as high pressure is in control. After a night of calm wind tonight, Saturday starts off rather cool, but warms nicely during the day, and Sunday ends up the warmer of the 2 days as the high pressure area slides to the south and a west to southwest wind strengthens, transporting warmer air from the Ohio Valley our way. However a cold front will drop out of Canada and cross the region during the early hours of Monday, perhaps with a few showers. There has been some waffling of guidance as to whether or not Monday would clear out or end up unsettled. For now I continue to lean toward the drier more optimistic side with perhaps a morning shower then fair weather returning. An area of high pressure from Canada will not really make a dive into the Northeast, but rather nose its way in but stay mostly to the north. This will allow the front that went by to re-approach as a warm front later Tuesday with an increase in clouds, but the early idea is that any shower threat with this would hold off that day.

TODAY: Sunny start then a sun/cloud mix. Isolated afternoon showers. Highs 70-77. Wind NW 5-15 MPH.

TONIGHT: Clearing. Lows 49-56. Wind NW under 10 MPH then calm.

SATURDAY: Sunny. Highs 72-79. Wind calm then W to SW up to 10 MPH.

SATURDAY NIGHT: Clear. Lows 53-60. Wind SW up to 10 MPH.

SUNDAY: Sunny. Highs 76-83. Wind S 5-15 MPH.

SUNDAY NIGHT: Partly cloudy. Chance of a shower overnight. Humid. Lows 60-67. Wind SW 5-15 MPH.

MONDAY: Partly sunny. Chance of a shower in the morning. Highs 70-77. Wind N 5-15 MPH.

MONDAY NIGHT: Mostly clear. Lows 50-57. Wind NE up to 10 MPH.

TUESDAY: Partly sunny. Highs 70-77. Wind E up to 10 MPH.

DAYS 6-10 (SEPTEMBER 15-19)

Low pressure passing north of the region drags a warm front through early on September 15 with a warm and more humid day being the result. Its cold front should move in at night or on September 16 with potential showers and a few thunderstorms followed by drier and cooler air later September 16 into September 17. High pressure that moves in briefly at that time will then slide offshore later in the period and a southerly wind will develop, at which time we may need to be keeping an eye on tropical moisture to the south of New England for a potential run at the region. Low confidence on this part of the forecast but definitely some hints that it can occur on our medium range guidance and from the overall weather pattern expected.

DAYS 11-15 (SEPTEMBER 20-24)

The weather pattern still should feature a mostly west-to-east movement of systems pending on what happens with the moisture to the south to start the period, but eventually a cold front should sweep through with a drier air mass arriving by mid period. A lot of tweaking to come on future updates.

C-19 Chat Post – September 10 2021

DAYS 1-5 (SEPTEMBER 9-13)

A slow-moving cold front moving west to east across the region will be the focus for showers and a few thunderstorms today into tonight, enhanced this afternoon and early evening by a wave of low pressure moving along it. Shower activity will be widespread, and while not every location will see the heaviest downpours, many will see some heavy rainfall for a time, and localized flooding may result – but not to the degree of recent events. Additionally, we have rough surf and large ocean swells (and resultant high rip current risk) from offshore Hurricane Larry ongoing today, which will also linger into the start of the weekend as the storm races by southeastern Canada on its way into the northern Atlantic. Meanwhile, we dry out overnight / early Friday as our low pressure wave and front pull offshore. Drier air moves in Friday as high pressure moves across the Great Lakes and Ohio Valley, but a weak trough moving through at upper levels supplies a pool of chilly air above us, and that results in some atmospheric instability, so when the sun heats the ground on Friday and works on the lingering moisture from today’s rainfall, we’ll see diurnal cloud development to prevent a totally sunny day, and some of those clouds may grow enough to produce a few isolated showers mainly in the afternoon. But with high pressure sliding to the south of the region and the upper levels warming, we have excellent timing for great late summer weather this upcoming weekend, both Saturday and Sunday, with the coolest part of the weekend being Saturday morning and Sunday the warmer of the 2 days. Another bubble of high pressure in eastern Canada will send a frontal boundary through the region early Monday with some clouds accompanying it, but right now it looks like we will miss any shower chance.

TODAY: Mostly cloudy morning with showers/thunderstorms moving out of eastern coastal MA and across Cape Cod through 8AM then numerous to widespread showers returning from southwest to northeast all areas mid morning through afternoon with embedded downpours and possible thunder. Poor drainage area flooding and small stream flooding may occur. Areas of fog. Humid. Highs 69-76. Wind S becoming variable then N 5-15 MPH.

TONIGHT: Cloudy with widespread to numerous showers through evening. Breaking clouds overnight. Areas of fog. Humid. Lows 60-67. Wind N 5-15 MPH.

FRIDAY: Partly sunny. Isolated afternoon showers. Less humid. Highs 70-77. Wind NW 5-15 MPH.

FRIDAY NIGHT: Clearing. Lows 51-58. Wind NW to W under 10 MPH.

SATURDAY: Sunny. Highs 72-79. Wind calm then S to SW up to 10 MPH.

SATURDAY NIGHT: Clear. Lows 53-60. Wind SW up to 10 MPH.

SUNDAY: Sunny. Highs 76-83. Wind S 5-15 MPH.

SUNDAY NIGHT: Partly cloudy. Lows 60-67. Wind SW 5-15 MPH.

MONDAY: Partly sunny. Highs 70-77. Wind NW 5-15 MPH.

DAYS 6-10 (SEPTEMBER 14-18)

High pressure brings fair weather to the region September 14 into September 15 with a cooler start then warming up. Next frontal system brings shower chances late September 15 to early September 16 followed by fair, drier and slightly cooler weather into September 17 before it warms up again at the end of the period.

DAYS 11-15 (SEPTEMBER 19-23)

A weaker west to east flow pattern is expected but this may allow low pressure to the south of the region to get a little closer with some cloudiness and possible shower chances early in the period. Another disturbance from the west may bring showers followed by a late period cool-down, but this is lower confidence at this time.

C-19 Chat Post – September 9 2021

DAYS 1-5 (SEPTEMBER 8-12)

High pressure moves offshore today and a southerly air flow develops and strengthens ahead of an approaching trough and frontal system from the west. While we see lots of sun during the day today, you’ll notice more clouds showing up later and those will increase significantly this evening. This time when we get into unsettled weather with some threat of heavier rainfall, it will all take place pretty much during the calendar day Thursday, between the two midnights, as a frontal boundary slowly moves west to east across the region and a wave of low pressure forms on it. This will create waves of showers and a few possible embedded thunderstorms. Downpours are possible but this time we won’t see them as intense and widespread for longer time like we saw with a couple recent systems. We’ve had a little time to dry out since Ida’s remains came through last week, so while some localized flooding is possible, it should not be a major issue. It’s back to fair weather Friday as Canadian high pressure approaches with a drying northwesterly breeze, and then a spectacular weekend follows with high pressure in control, coolest early Saturday as the high center will be moving overhead, warmest Sunday afternoon as the high slides offshore.

TODAY: Mostly sunny to partly cloudy. Highs 76-83. Wind S 5-15 MPH, gusts above 20 MPH.

TONIGHT: Clouding up. Showers arriving from west to east. Downpours and embedded thunderstorms possible. Humid. Lows 62-69. Wind S 5-15 MPH, gusts above 20 MPH.

THURSDAY: Cloudy. Numerous to widespread showers with embedded thunderstorms possible. Humid. Highs 71-78. Wind S 5-15 MPH with higher gusts, becoming variable.

THURSDAY NIGHT: Mostly cloudy with lingering showers and patches of fog in the evening. Clearing overnight. Humid evening, less humid overnight. Lows 56-63. Wind variable 5-15 MPH becoming NW.

FRIDAY: Mostly sunny to partly cloudy. Highs 70-77. Wind NW 5-15 MPH.

FRIDAY NIGHT: Clear. Lows 51-58. Wind NW under 10 MPH becoming calm.

SATURDAY: Sunny. Highs 72-79. Wind calm then SW up to 10 MPH.

SATURDAY NIGHT: Clear. Lows 53-60. Wind SW up to 10 MPH.

SUNDAY: Sunny. Highs 77-84. Wind S 5-15 MPH.

DAYS 6-10 (SEPTEMBER 13-17)

A weak low and frontal system will move through the region on September 13 with some cloudiness and a risk of a few passing showers, otherwise dry. High pressure brings fair weather to the region September 14 into September 15 with a cooler start then warming up. Next frontal system brings shower chances late September 15 to early September 16 followed by fair, cooler/drier weather later in the period.

DAYS 11-15 (SEPTEMBER 18-22)

A generally zonal (west-to-east) flow pattern is expected. Current medium range timing suggests the best shower threat comes in the middle of the period with fair/mild weather to start, fair and briefly cooler thereafter.

C-19 Chat Post – September 8 2021

DAYS 1-5 (SEPTEMBER 7-11)

It’s been a while since a forecast outlook has been filled with many fair weather days, but this one is filled with 4 out of 5. The slower timing of the next frontal system makes it pretty much a Thursday system, with two fair-weather days on either side of it. First, high pressure moves over us today with a top 10 kind of day, then the high slides offshore for a warmer and slightly more humid day on Wednesday before a slow-moving cold front crosses the region taking nearly all 24 hours of Thursday, possibly delayed by a wave of low pressure on the front that may also enhance rainfall. But despite it’s slow movement, the front will clear the coast by Friday and we end up with two great days with dry weather and lower humidity to end the week and start the weekend Friday and Saturday as Canadian high pressure arrives. Also, still need to mention the large swells, rough surf, and rip current risk for coastal areas late this week due to offshore Hurricane Larry. Keep that in mind if you have any beach/boating plans.

TODAY: Sunny. Highs 71-78. Wind W up to 10 MPH.

TONIGHT: Clear. Lows 56-63. Wind SW under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 76-83. Wind SW 5-15 MPH.

WEDNESDAY NIGHT: Clouding up. Showers arriving from west to east. More humid. Lows 61-68. Wind S 5-15 MPH.

THURSDAY: Cloudy. Widespread showers with embedded thunderstorms possible. Humid. Highs 71-78. Wind S 5-15 MPH becoming variable.

THURSDAY NIGHT: Clearing. Lows 55-62. Wind W up to 10 MPH.

FRIDAY: Sunny to partly cloudy. Highs 70-77. Wind NW 5-15 MPH.

FRIDAY NIGHT: Clear. Lows 51-58. Wind NW under 10 MPH.

SATURDAY: Sunny. Highs 72-79. Wind SW up to 10 MPH.

DAYS 6-10 (SEPTEMBER 12-16)

High pressure moves offshore with fair and warmer weather September 12. Right now it appears the next frontal boundary comes through quietly early September 13 with fair weather continuing through mid period with only a slight cool-down. Next round of unsettled weather comes September 15 and/or 16 with the approach and arrival of a trough and frontal system from the west.

DAYS 11-15 (SEPTEMBER 17-21)

A generally zonal (west-to-east) flow pattern is expected with limited rainfall chances and a couple air mass changes keeping temperatures variable, but not that far from normal overall.