Summer Heat Continues; Severe Weather For Northeast

A large ridge of high pressure continues to deliver summer heat w/ humidity in several sections of the country. Excessive heat warnings and heat advisories are in effect across the Desert Southwest, southern Plains, Lower Mississippi Valley and a small part of the Mid-Atlantic. Meanwhile, severe thunderstorms are in the forecast for the Northeast into the northern Mid-Atlantic for damaging winds.
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Hazardous Weather Conditions

Last Update: 938 PM EDT Tue Aug 20 2019

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Miami - South Florida Local Forecast Office

10NM E Virginia Key FL

Marine Zone Forecast


...SMALL CRAFT SHOULD EXERCISE CAUTION TONIGHT...
Synopsis: A surface trough and associated moisture rounding the clockwise flow around Atlantic high pressure will allow for showers and storms tonight into Wednesday. As the trough exits, the easterly flow around the ridge of high pressure will persist through the week. Near the end of the week, another trough will move into the region with the potential for increased shower and storm chances.

.GULF STREAM HAZARDS...Lightning, gusty winds, locally higher seas, and waterspouts are possible with showers and thunderstorms over the Gulf Stream. Easterly wind surges will be capable of bringing brief bouts of cautionary conditions to the Atlantic waters tonight.

The approximate location of the west wall of the Gulf Stream as of Aug 20, 2019 at 1200 UTC...

5 nautical miles northeast of Fowey Rocks. 8 nautical miles east northeast of Port Everglades. 8 nautical miles east of Lake Worth. 12 nautical miles east northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Tonight
East southeast winds 10 to 15 knots with gusts to around 20 knots. Seas around 2 feet. Period 5 seconds. intracoastal waters a moderate chop. Chance of showers and thunderstorms.
Wednesday
East winds 10 to 15 knots. Seas around 2 feet. Period 4 seconds. Intracoastal waters a moderate chop. Chance of showers in the morning. Chance of thunderstorms. Showers likely in the afternoon.
Wednesday Night
East winds around 10 knots. Seas around 2 feet. Period 3 seconds. Intracoastal waters a light chop. Slight chance of showers in the evening. Slight chance of thunderstorms through the night. Chance of showers after midnight.
Thursday
East winds around 10 knots. Seas around 2 feet. Period 3 seconds. Intracoastal waters a light chop. Chance of showers in the morning. Chance of thunderstorms. Showers likely in the afternoon.
Thursday Night And Friday
East southeast winds around 10 knots. Seas around 2 feet. Intracoastal waters a light chop. Chance of showers and slight chance of thunderstorms in the evening, then showers likely and chance of thunderstorms.
Friday Night
Southeast winds around 10 knots. Seas around 2 feet. Intracoastal waters a light chop. Showers likely in the evening. Chance of thunderstorms through the night. Chance of showers after midnight.
Saturday
Southeast winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters a light chop. Chance of showers and thunderstorms.
Saturday Night And Sunday
South southeast winds 5 to 10 knots. Seas less than 2 feet. Intracoastal waters a light chop. Chance of showers and thunderstorms.
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ABOUT THIS FORECAST

Last Update: 938 PM EDT Tue Aug 20 2019
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