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Posted at 9:30 AM ET, 04/28/2009

Forecast: Heat Retreat After Today

By Matt Rogers

Natural air conditioning kicks in tomorrow

* Weather Whiplash | Air Quality Awareness Week: Day 2 *


Today: Mostly sunny, still hot. 88-92. Tonight: Partly cloudy. 60-64. | Tomorrow: Showers, storms, starting early (80% chance). 63-67. | A Look Ahead


Our semi-summer preview is coming to a close. "Semi" refers to the lack of high humidity, which has made the heat semi-tolerable despite the record levels. Look for one more solid day of that action before big changes arrive tomorrow. We are talking about a steep thirty-degree drop in high temperatures from today to tomorrow.

Temperatures: Current area temperatures. Powered by Weather Bonk. Map by Google. Hover over and click icons for more info. Click and hold on map to pan. Refresh page to update. See map bigger on our Weather Wall.

Today (Tuesday): Mostly sunny skies and hot weather continue today with highs in the upper 80s to low 90s for the fourth straight day. Winds will be breezy mainly from the southwest direction. Confidence: High

Tonight: The latest thinking pushes back the timing of the cold front so that showers and storms hold off potentially until dawn on Wednesday. Therefore, tonight will be partly cloudy with lows in the 60s. Confidence: Medium

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday): A cold front will enter the region and decide to stay for a while. Look for frequent showers and thunderstorms (80% likelihood) with .25" to .5", locally heavier. Highs will ONLY be in the middle 60s. Confidence: Medium

Tomorrow Night: More showers (60% chance) and cooler with lows in the lower 50s. Confidence: Low-Medium


Thursday looks cool, cloudy, and showery as the front stalls around the area and cool breezes from the northeast and east persist. Highs should remain down in the 60s. Rain chances are about 60%. Confidence: Low-Medium

Friday looks as though we can't shake those showers. Look for a 60% chance of more scattered shower activity. The cold front will begin lifting northward, allowing the area to push back up into the middle 70s. Confidence: Low-Medium

The weekend is having a real problem trying to live up to the last one's fantastic standards. We will be struggling with a cold-front-turned-warm-front and then with a new cold front by late Saturday into early Sunday. The result is yet more showers on Saturday (with 70s for highs) and perhaps much cooler weather again on Sunday (60s and breezy again) with a chance for some sunshine at least. The details are still in motion on the weekend, so stay tuned to see if we can salvage it! Confidence: Low

By Matt Rogers  | April 28, 2009; 9:30 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: PM Update: Hot Weather Continues One More Day
Next: Heat Wave By the Numbers


Any chance that lovely, lovely cold front will push through earlier than tomorrow am? Our community's AC is on the fritz.

Posted by: hereandnow1 | April 28, 2009 6:23 AM | Report abuse

Sorry hereandnow1, the cold front is really taking its time. It looks like we'll get the cooler wind shift tonight around midnight, so you'll have to suffer through one more hot day today. But the good news is that we do not see any other similar major heat events through the next two weeks. -Matt

Posted by: MattRogers | April 28, 2009 6:30 AM | Report abuse

I'd like to mow my lawn before the next batch of rain hits. Should I do it tonight? However, I'd like to wait as as long as possible because the grass/ground is still moist from the last batch of showers. A drier ground makes for easier mowing. Thanks.

Posted by: jojo2008 | April 28, 2009 9:15 AM | Report abuse

So on the radio this morning they said that tomorrow (Wed) would be cloudy with an occasional morning sprinkle and maybe a few more showers in the afternoon. But you guys seem to be implying a more significant rainfall than that. So how wet should I expect to get if I spent tomorrow morning outside (in FFX Co.)? How uncertain is it right now? Thanks!

Posted by: mrwrinkle | April 28, 2009 10:20 AM | Report abuse

mrwrinkle -- Exactly how much rain will fall and how heavy the showers will be is still somewhat uncertain. But at the very least, I think odds are pretty good (60% chance or better) that you'll encounter light to moderate showers if you're out and about in the DC metro area tomorrow morning.

Posted by: Dan-CapitalWeatherGang | April 28, 2009 12:42 PM | Report abuse


Yes--mow your lawn today if you can. We enter a wet period starting late tonight, with shower chances daily through Saturday or Sunday.


We're thinking the rain may be on the heavy side tomorrow morning -- from pre-dawn through late morning (70% Chance). The morning looks to be wetter than the afternoon.

Posted by: CapitalWeatherGang | April 28, 2009 12:46 PM | Report abuse

jojo2008 -- may very well be showery come tomorrow morning, so would recommend mowing this evening if the lawn has dried out enough.

Posted by: Dan-CapitalWeatherGang | April 28, 2009 12:47 PM | Report abuse

Preliminary extended forecast maps aren't quite so pessimistic. We should have periods of showery rain alternating through the next few days with periods of little or no rain. Hopefully we can erase our remaining YTD precipitation deficit in the next week or so. Then I can hope for my much-needed dry spell.

The current IAD upper-air sounding report cites little or no thunderstorm risk for most of today. West of us in Ohio there's a moderate thunderstorm risk.

Posted by: Bombo47jea | April 28, 2009 12:52 PM | Report abuse

what are the chances for a good outlook for the friday nats game? i'd hate to be rained out.

Posted by: sillygoose22 | April 28, 2009 1:32 PM | Report abuse

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