Dangerous Heat Building in the West; Severe Storms in the Upper Midwest

A long duration heat wave will build across the Southwest, California, and Pacific Northwest. Dangerous heat is also forecast for the Great Basin and South Plains. Severe storms in the Upper Midwest may have locally heavy rain, damaging winds, and very large hail. Heavy rain and flooding will also be possible in the Deep South and Appalachians.
Read More...

Last Update: 1006 PM EDT Thu Aug 13 2020

View Nearby Observations

For More Weather Information:

Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Zone Forecast


Synopsis: ANZ100-141615- 1006 PM EDT Thu Aug 13 2020 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure builds out of northern Canada and into the Maritimes through the weekend. Increasing northeast winds as the high builds in may bring a window of gusts and building seas before a return to calmer weather. A slow moving frontal system will approach the waters by early next week. && $$

Overnight
SW winds around 5 kt, becoming NW. Seas around 2 ft.
Fri
N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft.
Fri Night
NE winds 5 to 10 kt, becoming 5 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Sat
NE winds around 15 kt with gusts up to 25 kt. Seas 4 to 6 ft.
Sat Night
NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft.
Sun
NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft.
Sun Night
E winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. A chance of showers after midnight.
Mon
E winds 10 to 15 kt. Seas 5 to 6 ft. A chance of showers.
Mon Night
E winds 5 to 10 kt, becoming NW after midnight. Seas 5 to 6 ft. A chance of showers.
Tue
W winds 5 to 10 kt, becoming SW in the afternoon. Seas 4 to 5 ft. A chance of showers.
Tue Night
SW winds 5 to 10 kt, becoming NW after midnight. Seas 3 to 4 ft.
  Click Map For Detailed Forecast

ABOUT THIS FORECAST

Last Update: 1006 PM EDT Thu Aug 13 2020
  Forecast Discussion
   

RADAR & SATELLITE IMAGES

Link to Local Radar Data Link to Satellite Data