Lexington Weather

Lexington, Massachusetts, USA

82°F
7/12/2026 1:26pm 
  • Lexington Conditions: Partly cloudy
  • Temperature: 81.5°F / 27.5°CWarmer 0.2°F than last hour.
  • Dew Point: 56.8°FDecreased 1.1°Fsince last hour.
  • Relative Humidity: 43%Decreased 2.0% since last hour.
  • Wind: Calm, 10-min avg: Calm, gust: None
  • Barometer: 30.12 in Steady
  • Visibility: 10 miles
  • Rain Today: 0.00 in
  •   

National Short Range Forecast Discussion 

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 AM EDT Sun Jul 12 2026

Valid 12Z Sun Jul 12 2026 - 12Z Tue Jul 14 2026

...Dangerous heat reaching its peak today from the Great Basin to the
northern Plains with all-time record highs possible...

...Threat of heavy rain today across the southern Appalachians to the
Carolinas will shift to the central Gulf Coast and across central Texas
Monday into Tuesday...

An intensifying upper-level high centered over the western U.S. is working
in concert with an upper-level trough digging toward the Pacific Northwest
to bring anomalous heat from the Great Basin to the northern Plains.  This
heatwave is expected to peak this afternoon when triple-digit high
temperatures will be common along this corridor.  In fact, a few all-time
high temperature records will be challenged (including the all-time high
of 107 at Salt Lake City, UT, and 108 at Billings, MT).  If you will be
situated within any of these areas forecast to experience extreme heat,
stay hydrated, take frequent breaks and limit outdoor activities if
possible.  A cold front will begin to bring cooler air eastward from the
Pacific Northwest into Montana later today, while anomalous heat soaring
well into the 100s is forecast for the Northern Plains early this week.

Meanwhile, repeated rounds of showers and thunderstorms are expected to
continue today across the southern Appalachians to the Carolinas as a
couple of low pressure waves undulate along a slow-moving front.  The
threat of heavy rain associated downpours from thunderstorms continues to
pose a slight risk of flash flooding today along this corridor of the
eastern U.S.  By Monday, the threat of flash flooding is forecast to
lessen across the Mid-Atlantic although scattered heavy downpours remain
possible over interior Southeast.  Meanwhile, heavy rain and flash
flooding threats will shift toward the central Gulf Coast and central
Texas on Monday into Tuesday as Gulf moisture will remain in place near
the tail end of the stationary front.  Farther west, some monsoonal
thunderstorms are expected to emerge across southern Arizona into New
Mexico, which could lead to a few instances of flash flooding over the
next several days.

Kong


Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php