Lexington Weather

Lexington, Massachusetts, USA

81°F

7/13/2026 6:39pm

Lexington Conditions: Partly cloudy
Temperature: 80.8°F / 27.1°C
Dew Point: 68.4°F
Feels Like: 83.7°F
Relative Humidity: 66%
Wind: Calm, 10-min avg: Calm, gust: 8 mph
Barometer: 30.01 in Rising Slowly
Visibility: 10 miles
Rain Today: 0.00 in

Southeast Middlesex County, MA - Heat Advisory
- SEE ALL NEARBY ALERTS -

Watches, Warnings, and Advisories

Issued by the National Weather Service - Great Falls, MT

HEAT ADVISORY

Helena Valley, MT

Heat Advisory issued July 13 at 2:20PM MDT until July 13 at 9:00PM MDT by NWS Great Falls MT

HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING

Areas Affected: Eastern Toole and Liberty; Hill County; Northern Blaine County; Southern High Plains; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Gates of the Mountains; Helena Valley; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley

Urgency: Expected

Severity: Moderate

Certainty: Likely

Alert Sent: Monday 2:20pm MDT

Alert Effective: Monday 2:20pm MDT

Alert Expires: Monday 9:00pm MDT

Event Onset: Monday 2:20pm MDT

Event Ends: Monday 9:00pm MDT

Issued by: NWS Great Falls MT

Details:

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...

* WHAT...Hot daytime temperatures of 90 to 98 degrees, with overnight
temperatures of 60 to 70 degrees.

* WHERE...Portions of central, north central, and southwest Montana.

* WHEN...Until 9 PM MDT this evening.

* IMPACTS...Multiple days of hot temperatures may cause heat
illnesses and cumulative heat stress.

Information:

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Meta data:

ID: urn:oid:2.49.0.1.840.0.7828d928fc2256bcde59aa8f32cd4daed70bd6cb.001.1
Codes: MTZ304, MTZ305, MTZ306, MTZ308, MTZ309, MTZ310, MTZ311, MTZ312, MTZ313, MTZ314, MTZ316, MTZ319, MTZ323, MTZ324, MTZ325, MTZ326
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7828d928fc2256bcde59aa8f32cd4daed70bd6cb.001.1

FLOOD WATCH

Helena Valley, MT

Flood Watch issued July 13 at 2:16PM MDT until July 15 at 12:00AM MDT by NWS Great Falls MT

FLOOD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING

Areas Affected: Southern Rocky Mountain Front; Southern High Plains; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Little Belt and Highwood Mountains; Snowy and Judith Mountains; Helena Valley; Big Belt, Bridger and Castle Mountains; Meagher County Valleys; Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Gallatin Valley; Gallatin and Madison County Mountains and Centennial Mountains

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Monday 2:16pm MDT

Alert Effective: Monday 2:16pm MDT

Alert Expires: Tuesday 3:15am MDT (expect updated alert by this time)

Event Onset: Tuesday 3:00pm MDT

Event Ends: Wednesday 12:00am MDT

Issued by: NWS Great Falls MT

Details:

...FLOOD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of central, north central, and southwest Montana.

* WHEN...From Tuesday afternoon through Tuesday evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas and along burn
scars.

* ADDITIONAL DETAILS...
- Heavy rainfall produced by thunderstorms may lead to flash
flooding. Rainfall rates in excessive of 1 inch per hour are
possible under heavier thunderstorms.
- Some locations that may experience flooding include...
Great Falls, Bozeman, Helena, Lewistown, Townsend, Fort Benton,
West Yellowstone, White Sulphur Springs, Cascade, Big Sandy,
Stanford, Lincoln, Belgrade, East Helena, Three Forks, Manhattan,
Belt, Geraldine, Denton, Hobson and the Horse Gulch burn scar.
- http://www.weather.gov/safety/flood

Information:

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Meta data:

ID: urn:oid:2.49.0.1.840.0.e56b5c9ee9bc21267156e82db7456d1032066254.001.1
Codes: MTZ307, MTZ308, MTZ310, MTZ311, MTZ312, MTZ313, MTZ314, MTZ315, MTZ316, MTZ317, MTZ318, MTZ319, MTZ320, MTZ321, MTZ322, MTZ323, MTZ324, MTZ326, MTZ330
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e56b5c9ee9bc21267156e82db7456d1032066254.001.1