Friday July 17 2026 Forecast (6:32AM)

44 Comments

DAYS 1-5 (JULY 17-21)

Cleaner air from eastern Canada is with us today before some of the wildfire smoke plume to our south makes a comeback tonight into Saturday, before being pushed out again. High pressure dominates today. Low pressure passes north of our region this weekend. Its warm front will bring a round of showers Saturday afternoon, and it looks like the steadiest / heaviest rainfall will be south of I-90 from that front. Later at night, a cold front sweeps through with a round of showers and thunderstorms – quicker timing than previously expected. But, this means great weather returns for the day on Sunday, and there should be a reduction of smoke again, though we’ll watch for yet another come back of that by early next week. Speaking of early next week, I expect fair weather Monday with high pressure in control, followed by higher humidity and shower / thunderstorm chances later Tuesday as the next trough and frontal system arrives from the west.

TODAY: Abundant sun. Highs 78-85, coolest coast. Dew point 50s. Wind N to NE 5-15 MPH.

TONIGHT: High clouds move in and high altitude smoke returns. Lows 60-67. Dew point 50s. Wind NE to E up to 10 MPH.

SATURDAY: Clouds increase. High altitude smoke remains. Showers in the afternoon will be most prominent from I-90 southward, but a brief period of them is also possible to the north. Highs 78-85. Dew point near 60. Wind E to SE up to 10 MPH.

SATURDAY NIGHT: Lots of clouds. Showers and possibly a thunderstorm late evening to early overnight from west to east. Fog patches late. Lows 62-69. Dew point 60+. Wind S 5-15 MPH.

SUNDAY: Sun and passing clouds. Highs 79-86. Dew point falls to 50s. Wind W 5-15 MPH.

SUNDAY NIGHT: Clear. Fog patches low elevation areas. Lows 58-65. Dew point 50s. Wind calm.

MONDAY: Sunshine, but potential high altitude smoke. Highs 78-85, coolest coast. Dew point 50s. Wind variable up to 10 MPH with coastal sea breezes.

MONDAY NIGHT: Partly cloudy. Potential high altitude smoke. Lows 60-67. Dew point climbs toward 60. Wind S up to 10 MPH.

TUESDAY: Mostly cloudy. Hazy. Shower and thunderstorm chances increase later in the day. Highs 80-87. Dew point climbs through 60s. Wind S 5-15 MPH.

DAYS 6-10 (JULY 22-26)

Shower / t-storm chances greatest mid period with a system moving through from west to east. Otherwise mostly dry. Temperatures near normal, though somewhat variable.

DAYS 11-15 (JULY 27-31)

Shower / t-storm chances early period and period, with fair weather between. Temperatures near normal but somewhat variable.

44 thoughts on “Friday July 17 2026 Forecast (6:32AM)”

  5. Thanks TK
    Bust potential like the other day in northern New England with the smoke returning tomorrow???

    SPC Outlook for Saturday. This will get updated around 1:30 this afternoon.
    https://www.spc.noaa.gov/partners/outlooks/state/images/MA_swody2.png?1784266447

    Tornado Percentages
    https://www.spc.noaa.gov/partners/outlooks/state/images/MA_swody2_TORN.png?1784266569

    Wind Percentages
    https://www.spc.noaa.gov/partners/outlooks/state/images/MA_swody2_WIND.png?1784266745

    Reply

  7. Quick look at the SREF for tomorrow it is showing that low tornado risk. As I said earlier will this be a bust with the return of the smoke

    Reply

    1. SREF is going to be retired. I always liked looking at that one.
      Bummer! I wonder if they will create a similar product using RRFSA?????

      Reply

      1. I one I Googled it, this is what I got:

        AI Overview Yes, the Short-Range Ensemble Forecast (SREF) is being replaced by the Rapid Refresh Forecast System (RRFS) and its associated ensemble components. The National Weather Service (NWS) plans to officially retire the SREF, along with the NAM and HREF, on August 31, 2026.This transition is designed to simplify and unify short-range forecasting by integrating multiple legacy models into one cutting-edge, 3 km resolution system.

        YAY! so it does look like it will be replaced. Would like to have a peek at it before it is released. Anyone have a link for that?

        Many thanks

        Reply

  10. The 12z NAM doing what it always does overcooking severe parameters tomorrow evening.

    0z 8pm supercell composite
    https://www.pivotalweather.com/model.php?m=nam&p=scp&rh=2026071712&fh=36&r=us_ne&dpdt=&mc=

    SIG TOR Parameter 8pm tomorrow
    https://www.pivotalweather.com/model.php?m=nam&p=stp&rh=2026071712&fh=36&r=us_ne&dpdt=&mc=

    Supercell Composite 11pm tomorrow
    https://www.pivotalweather.com/model.php?m=nam&p=scp&rh=2026071712&fh=39&r=us_ne&dpdt=&mc=

    SIG TOR Parameter 11pm tomorrow
    https://www.pivotalweather.com/model.php?m=nam&p=stp&rh=2026071712&fh=39&r=us_ne&dpdt=&mc=

    Reply

    1. Excellent. 3 in the car today. Always seems to happen when I get the word in 3. 🙂 🙂 🙂

      Reply

  13. If anyone out there is familiar with Power Shell I have a little script that will display current weather for a given zip code:

    For example, I used 02130 for Jamaica Plain
    and here is the output:

    Please enter Zip Code OR City,STATE ABBRV: 02130

    City: Brookline
    Coordinates: 42.3318,-71.1212
    Temperature: 76.4 F
    Dew Point: 51 F
    Humidity: 48 %
    Weather: few clouds
    Wind Degrees: 150 Deg
    Wind Compass: SSE
    Wind Speed: 2.68 Mph
    Pressure: 1015 Mb
    Sunrise: 7/17/2026 5:22:36 AM
    Sunset: 7/17/2026 8:18:16 PM

    Data comes from Open Weathermap and if doesn’t have data for the given zip, it will provide data for the nearest location for which it has data.

    Reply

  14. All of the previous information about the model changes remains the same with the exception of the retaining of HRRR for longer.

    Reply

  15. NWS corrected. Yesterday’s high at Logan was 89. As I had stated there were no 90° readings anywhere in the area yesterday. At least not from stations that are correctly calibrated. 🙂

    There’s a good reason why I pay close attention to this stuff. I’ve worked with two very prominent state climatologists from Massachusetts and they taught me how to do this the right way.

    Reply

  17. Just received from nws boston. It’s not BS or word salad and I’ve spoken to this individual before and know he cares

    “…our techs were doing the quarterly preventative maintenance and system checks yesterday.   Of course, sometimes missing data means something happened with the ASOS, so when we see that happen, we send the technicians out to correct the problem.  Regarding the temperature, the temperature sensor was well within calibration threshold, with an error of less than 1F — so that unit was not replaced.  Actually all the sensors were operating well within normal thresholds. “

    Reply

  19. Thanks TK. Actually just received a text from Eversource here in CT stating they were preparing and mobilizing for severe weather tomorrow and possible outages.

    Reply

  22. That was a pretty good start of the second half of the season for the Red Sox. They beat the league-leading Rays 10-0.

    They now have a 10-game winning streak.

    Reply

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