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The week ahead: Early Extreme Heat To Ease...

Jason Samenow @ 7:25 AM

Heat Advisory in effect for entire region.
Preparation and Response Tips

The new week brings both good news and bad news. The bad news is that extreme heat and high humidity will grip the region for the next two days. The good news is that some relief is likely by Wednesday, and the threat of a prolonged heat wave appears reduced -- although temperatures should be above average for a good portion of the week.


Forecast Confidence: High-Very HighVery Hot with some humidity -- Upper 90s. The heat wave which brought record breaking temperatures to the Northern Plains and Midwest continues its trek eastward today. Across our region, expect partly to mostly sunny skies with highs 95-100.

Important notes:
- It will feel the hottest between 2 and 6pm when moderately high humidity (dewpoints in the upper 60s) will produce heat indices of 100-105.
-Air quality will be unhealthy for sensitive groups
- The UV Index will be very high, reaching about 9 at 1pm.
- Today's record of 102 at Reagan National Airport is not likely in jeopardy.

Overnight, it will not cool off significantly in urban areas, with lows just 74-78. The normally cooler suburbs will drop to around 70.

Photo by photographer Ian Livingston.


Forecast Confidence: HighWorst of heat wave. Highs 97-102, humid. The core of the heat will be overhead, allowing temperatures to flirt with the century mark. In addition, humidity will be a bit higher than today's, allowing heat indices to rise above 105 in some instances. It's not out of the question that a few thunderstorms could affect the region during the evening due to a front approaching from the northwest. Sometimes heat wave breaking fronts can trigger storms that produce gusty winds, dangerous lightning and torrential rains -- so we'll need to monitor this potential tomorrow. Overnight lows will be 70-75.


Forecast Confidence: Medium-HighA bit cooler. A cold front will gradually pass through the region from west to east during the morning to afternoon hours. High temperatures will be somewhat lower than Monday and Tuesday, with highs in the low 90s. With the front in the region's vicinity -- a storm or two could pop up, but most likely east of DC. Overnight, it should be clear and seasonably warm, with lows in the upper 60s to low 70s (downtown).


Forecast Confidence: Medium-HighVery warm, humid. Sourtherly flow will promote characteristic summer heat and humidity, with highs in the low 90s. A thunderstorm or two may pop in the late afternoon or evening, but should be quite isolated. Overnight, it will be mostly clear and seasonable with lows in the upper 60s to low 70s.


Forecast Confidence: Medium-HighVery warm, humid, t'storm threat? Another cool front will likely move through the region, and could set off some storms (35% chance) late in the day. High temperatures should be in the low 90s, with lows in the low 70s.


Forecast Confidence: MediumPotentially pretty nice. Assuming Friday's front clears the area, high pressure will build in from the northwest which would lower temperatures and humidity levels. Highs may actually be a shade below average, with highs in the mid to upper 80s. Overnight lows may range from about 64-70 (suburbs to city).


Forecast Confidence: MediumHeat and humidity to return? The flow may again turn southerly bringing back some heat, humidity and the chance of an isolated storm or two. High temperures may reach 90 -- with humidity levels on the rise.


The average high this week is around 89, with an average low of 70.

Poll Results

Doug Hill is area's most popular weathercaster. First Doug beat all the other Chiefs (Topper Shutt, Bob Ryan and Sue Palka--edging Bob by just one vote ), now he has beaten the best of the rest (the most popular morning, weekend and past weathercaster). More than 500 votes were cast and Doug received 41% of them. Steve Rudin, the most popular former weathercaster, came in with a strong showing, earning 33% of the votes (maybe he should consider returning to TV -- he's now a real estate professional in the area). Kim Martucci and Tony Pann, the most popular morning and weekend weathercasters (respectively), earned 19% and 8% of the vote.

Vote in the new poll: How hot will it get this week?

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