Lexington Weather

Lexington, Massachusetts, USA
80°F
5/27/2026 7:42pm
Lexington Conditions: Clear
Temperature: 80.1°F / 26.7°C
Dew Point: 51.4°F
Relative Humidity: 37%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.62 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
359 PM EDT Wed May 27 2026

Valid 00Z Thu May 28 2026 - 00Z Sat May 30 2026

...Rounds of heavy rain and thunderstorms continue for much of the
Southern U.S. through late week...

...Unsettled weather lingers across parts of the West as a slow-moving
Pacific low spins over California and the Great Basin...

...Summerlike heat persists for the northern Rockies/Plains and Upper
Midwest with widespread high temperatures well into the 80s and 90s...

Very moist Gulf air south of a meandering frontal boundary across the
southern U.S. will continue to lead to widespread showers and
thunderstorms the next few days in an overall wet pattern. The focus
through the rest of this evening will be along the boundary from the
Mid-Atlantic west through the central Appalachians/Ohio Valley and into
the central/southern Plains. A few more potent thunderstorms are expected
through the southern Mid-Atlantic into the central Appalachians/Ohio
Valley with locally heavy rainfall and severe weather possible. A Slight
Risk of Excessive rainfall (level 2/4) remains in effect as some scattered
instances of flash flooding are possible, and the Storm Prediction Center
has also outlined a Slight Risk of severe weather (level 2/5) mainly for
the threat of some damaging winds. Another Slight Risk of Excessive
rainfall is also in effect across portions of the western to central Gulf
Coast, though the threat should taper off into the evening hours.
Additional rounds of storms are forecast both Thursday and Friday with the
focus shifting into the Ozarks and Southeast as the boundary slides a bit
further southward. At least isolated instances of flash flooding will
remain possible.

A deep Pacific upper-low remains entrenched over the western U.S. with
only slow eastward progress expected through the next couple days. Showers
and thunderstorms will continue broadly from central/northern California
into the Pacific Northwest and east into the northern Rockies today and
tomorrow before centering on the northern Great Basin/Rockies by Friday.
Some isolated flash flooding is possible especially for the northern
Rockies due to more sensitive mountainous terrain and burn scars.
Elsewhere, an upper-low dropping south from southeastern Canada will help
to spin up a low pressure/frontal system into New England late Thursday
into Friday bringing showers an thunderstorms. Some of the rainfall may be
heavy, particularly across central New England into southern Maine. Most
of the Midwest and Southwest should remain dry.

Temperatures in general remain a bit flipped flopped across the lower 48
this week as below average temperatures are favored across the southern
U.S. with above average temperatures to the north. Hot summerlike heat has
persisted particularly for the northern Rockies/Great Basin into the
northern Plains and Upper Midwest, where highs into the 90s are upwards of
25-35 degrees above average. Meanwhile, temperatures are well below
average across California, the Great Basin, and the Southwest under the
aforementioned deep upper-low. Forecast highs are generally in the 50s and
60s outside of the Desert Southwest where relatively warmer but still
below average highs into the 80s and low 90s are expected. Temperatures
will remain closer to average further east from the south-central U.S. to
East Coast with 80s common further south and 70s further north. Conditions
will be a bit cooler with mean troughing in place over New England, with
highs in the 60s.

Putnam


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