Heat Wave Forecast Discussion

This is the raw model guidance forecast of the heat index Wed. afternoon. It will still be very uncomfortable. across the area, but not quite as bad as Monday.

This is the raw model guidance forecast of the heat index Wed. afternoon. It will still be very uncomfortable. across the area, but not quite as bad as Monday.

This is water vapor imagery- (gray areas are moist air). YOu can see a connection of moisture from the tropical Pacific all the way tot he East coast fo the U.S. This is adding to our rainfall. You are looking at moisture at high levels in the troposphere (6-10km)

This is water vapor imagery- (gray areas are moist air).  You can see a connection of moisture from the tropical Pacific all the way to the East Coast, and this is adding to our rainfall, when storms develop. 

The heat will stay intense, with incredibly high humidity through Saturday on Delmarva, but the temps. will probably not be quite as hot as Monday, with some storms about. Some of these storms may have intense rain and lightning. Below is the complete text forecast and weather discussion. This is the forecast of record for today.

Updated: Tuesday, July 26, 2016 at 4:30 PM by Meteorologist Dan Satterfield:

DELMARVA FORECAST

Tonight: Warm and very muggy, with a few scattered storms about. Low 74-76. Wind: SW 1-5 mph. Rain Chance 30%.

Wednesday: Partly sunny and not quite as hot. Heat Index near 97. High 91-92. Rain chance 30%. Wind: NW 1-7 mph. (Beaches 90 falling to 85 as winds turn E 2-7 mph PM).

Wednesday Night: Partly Cloudy and still muggy. A few scattered storms about. Rain chance 30% but some storms could have heavy rain. Low 75. Wind: Light.

Thursday: Partly to mainly sunny and still hot. Scattered T-storms PM. High 91. Wind: SW 3-8, but E 2-9 mph on beaches PM. (Beaches 89 falling to 81 PM).

 

FORECAST DISCUSSION: Extreme heat and humidity continued across the entire region today, although it was not quite as hot as it was on Monday. Tomorrow will be slightly cooler, but still very hot and humid, with some scattered afternoon and night-time storms. The heat index tomorrow will still reach the mid to upper 90’s, but a weak sea breeze will bring cooler temps. to the beaches in the afternoon. Thursday will also be hot and humid, but it should not be quite as hot with some areas staying below 90, especially near the east coast beaches. Rain chances will increase slightly Thursday afternoon and evening, as this intense high pressure system in the upper atmosphere weakens some. Some of these storms will have heavy rains and a brief strong wind gust. Rain chances will increase more on Friday with some heavy storms in the area and highs may stay below 90 in some spots. It will still be very humid.

Saturday through Monday will still bring well above normal temperatures to Delmarva, but there will be a some thunderstorms, and some may have very heavy rainfall. Highs will reach near 90. Temps. may cool back to the upper 80’s in the afternoon by Monday and Tuesday, and less humid air may arrive by Tuesday as well.

 

ATLANTIC:

TUE: E 2-7 knots. Seas: 2 ft.
WED: S 5-7 knots. Seas: 2 ft.

CHESAPEAKE BAY:

TUE: E 2-7 knots. Seas: 0-1 ft.
WED: S 3-7 knots. Seas: 0-1 ft.

DELAWARE BAY:

TUE: E 2-7 knots. Seas: 1-2 ft.
WED: SE 3-7 knots. Seas: 1-2 ft.