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Posted at 3:15 PM ET, 08/ 4/2010

PM Update: Heat makes a comeback

By Ian Livingston

Storms tonight? Severe episode tomorrow?

* Severe Thunderstorm Watch until 1 a.m. *
* Heat Advisory for entire area 11 a.m. thru 8 p.m. Thursday *
* The great weathercaster switch | Heat records falling left and right *
* Outside now? Radar, lightning, temps & more: Weather Wall *

updated at 6 p.m.

Well, we still ended up seeing a fair amount of clouds today -- they seem to be enjoying their stay. But, it did not keep most places from rising into the lower 90s or even mid-90s this afternoon. This is now the 45th day at or above 90 at National this year. Add in dew points as high as the mid-70s and you've got quite an unpleasant day outside. There may be some relief in the form of a cooling shower or storm, but we're not losing the heat right away.

Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Through Tonight: We've got a muggy evening ahead as temperatures fall through the mid-to-upper 80s near sunset. There could be an isolated storm through evening, and we'll have to keep an eye on a complex of storms to the northwest. This had been scheduled to miss to the west, but it's looking more likely that storms could enter the region prior to midnight. Lows reach the mid-and-upper 70s.

Tomorrow (Thursday): Thursday's one of those days that starts out warm and sticky and turns hot quickly. Fortunately (or unfortunately depending on the storm severity), a cold front moving into the area will help put a cap on how high we go. Highs should still rise to at least the mid-90s with heat indices past 100. Storms likely begin to threaten by mid-to-late afternoon, and the severe threat looks a bit higher than normal so we'll be on the lookout for damaging winds as well as heavy rain and lightning.

See Dan Stillman's forecast through the weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

Hurricane season: Despite a start that has not been "hyperactive", forecasters at Colorado State University released an update for their seasonal forecast today. It is unchanged, and still calls for 18 named storms, 10 of which will be hurricanes and 5 of those major hurricanes. They also expect the Caribbean to be very active compared to normal.

By Ian Livingston  | August 4, 2010; 3:15 PM ET
Categories:  Forecasts  
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Next: Storms weaken while passing through area


LWX starting to take notice of the storms:

*just a quick update...especially for TV mets and em's...we won't be surprised if at least the western 1/2 of the County Warning Area gets put in a severe wtch box in the next hour.*

Posted by: Ian-CapitalWeatherGang | August 4, 2010 5:13 PM | Report abuse

Huge line of storms entering western Maryland and West Virginia right now. If they survive the mountains this could be bad.

Posted by: MKadyman | August 4, 2010 5:26 PM | Report abuse

Those storms on Wunderground look pretty severe, but for some reason I feel another split coming.

Thanks CWG for the warning about Thursday... time to make some ice.

Posted by: Cat11endofdays | August 4, 2010 5:39 PM | Report abuse

Gah. I'm hoping to see a bit of the aurora tonight if it moves just a little farther south. Clouds and muggy haze will not be helpful.

Posted by: magicdomino | August 4, 2010 6:01 PM | Report abuse

Another of these severe outbreaks threatening more power cutoffs...We've had too much of this during the current season and the speed of the approaching derecho-type storms is rather unusual for this time of year--more typical of April or May than July or August. Hopefully we can get back to some more normal summer weather.

Posted by: Bombo47jea | August 4, 2010 7:12 PM | Report abuse

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