Network News

X My Profile
View More Activity
The new Washington
Post Weather website
Jump to CWG's
Latest Full Forecast
Outside now? Radar, temps
and more: Weather Wall
Follow us on Twitter (@capitalweather) and become a fan on Facebook
Posted at 5:45 PM ET, 06/26/2010

Forecast: Heat and humidity reload

By Jason Samenow

* Air quality alert | Alex forms: Hurricane Tracking Center *
* Is summer weather prime for crime? | Beyond the BP spill *
* Outside now? Radar, temps & more: Weather Wall | NatCast *

Today's Daily Digit
 
A somewhat subjective rating of the day's weather, on a scale of 0 to 10.
 

More heat, and the humidity is back. Make it stop!
 
Get the 'Digit' on Twitter

EXPRESS FORECAST

Today: Hot and humid. Isolated p.m. storms. 92-96. | Tonight: Muggy. 68-75. | Tomorrow: Oppressive heat and humidity. Isolated p.m. storms. 95-99. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

Yesterday's brief, subtle drop in humidity is history. Today is sticky once again and tomorrow and Monday turn downright sultry - similar to Thursday. Through yesterday, we've tallied seven straight days of 90+ and we'll extend the streak to 10 by Monday. Also of interest: 6 out of 6 weekend days have reached 90 or higher so far this month and it looks like we'll close out the month 8/8. When's the relief coming? Tuesday.

Temperatures: Latest D.C. area temperature map powered by iMapWeather (base map by Google). Click and hold on map to pan. Double-click to zoom. Refresh page to update. See larger map on our Weather Wall.

Today (Saturday): Whereas yesterday the mercury struggled to reach 90, today it sails through that threshold and tops out in the mid-90s. To make matters worse, the humidity is much more noticeable - making the air feel like 100. A soft wind from the southwest at 5-10 mph won't do much to take an edge off the heat. However, a couple spots may get some relief from an isolated late afternoon or early evening thunderstorm (20% chance) -- mainly to the north and northeast. Confidence: Medium-High

Tonight: It's a very muggy night all-around. Lows might dip below 70 in the coolest outlying suburbs, but most spots will range from 70-75 -- with the warmest readings downtown. Confidence: High

Keep reading for the forecast into early next week...

Tomorrow (Sunday): Stepping outside and it's like you're entering a sauna. High temperatures climb all the way up into the upper 90s and the humidity makes it feel like 100-105. Like yesterday, somebody could see an isolated late day or early evening thunderstorm (20-30% chance). Confidence: Medium-High

Tomorrow Night: It's a muggy evening on steroids. The humidity is high and lows range from the low 70s in the "cooler" suburbs to the upper 70s downtown. Confidence: Medium-High

A LOOK AHEAD

Grimace and bear it - because it's the last scorching hot day for a while on Monday. The mercury takes one more ride up into the mid-to-upper 90s before a strong cold front moves in. As this cold front collides with hot, unstable air in place, there's a chance (40%) of some strong storms. After any storms end Monday evening, it becomes partly cloudy and cooler, with lows 65-70 (suburbs-city). Confidence: Medium

We begin a cooling trend on Tuesday and we may, finally, fall short of 90 even with partly to mostly sunny skies. Confidence: Medium

CLIMATE NOTE

The National Weather Service in Sterling, Va. posted an interesting climate note yesterday evening:

DCA HAS NOW RECORDED 90 DEGREE OR HIGHER TEMPERATURES IN SEVEN CONSECUTIVE DAYS... THE NINETEENTH TIME SUCH A STREAK HAS BEGUN BEFORE JULY SINCE WASHINGTON AREA TEMPERATURE RECORDS BEGAN IN 1872. THE FORECAST FOR DCA ALSO CALLS FOR AT LEAST A TEN DAY 90 DEGREE OR HIGHER STREAK THROUGH MONDAY THE 28TH. A TEN-DAY OR LONGER STREAK STARTING BEFORE JULY HAS ONLY OCCURRED FIVE TIMES AT WASHINGTON. AN EIGHTEEN DAY STREAK ENDED 14 JULY 1872 AND A FOURTEEN DAY STREAK ENDED 26 JUNE 1994.

By Jason Samenow  | June 26, 2010; 5:45 PM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   Del.icio.us   StumbleUpon   Technorati   Google Buzz   Previous: NatCast: Sticky, sizzling afternoon
Next: NatCast: Dog days come early

Comments

CWG, my garden needs a break. Send up some soaking rain ASAP!

Posted by: FIREDRAGON47 | June 26, 2010 9:07 AM | Report abuse

FIREDRAGON47, you will probably get your rain though later rather than sooner. We still have rain threats on 3 out of 6 days in the extended forecast, though it's only 20% today and tomorrow. This morning, the towering cumulus appeared to exceed expectations for a day with little or no expected rain...Sterling guidance appears to show the trough setting up along I-95 which might explain the convectiveness.

The Skew-T, hodogram and other raob guidance for IAD [Dulles] seems to show a rather slim thunderstorm possibility with a cap of 4.04 Celsius degrees...not sure how this would translate into near-term thunderstorms, but it might be on the lean side wrt convection. Only two of the parameters [Showalter and Energy Index] were pointing towards thunderstorms today. In a really convective setup all the five or six relevant parameters point towards activity; the Total Totals index is low, around forty it should be near fifty to really pose a thunderstorm threat.

Alex is just off Belize...should cross the Yucatan and move into the western Gulf...more likely to threaten Tampico or Brownsville than the oil spill zone.

Weatherboard debate seems to focus on the perceived severe threat to New England/New York...where they have been getting the severe weather recently.

Posted by: Bombo47jea | June 26, 2010 4:18 PM | Report abuse

No rain here in NW Spotsy. since June 3. Dome remains firmly in place.

Posted by: VaTechBob | June 26, 2010 5:50 PM | Report abuse

Thanks Bombo for your response. It was a hot n dry day here in Centreville. Arm hurts from hoisting the watering can. Pole beans climbing about 6 inches a day & very happy basil. We could water all day but there's nothing like natural rainfall.
Stay cool.

Posted by: FIREDRAGON47 | June 26, 2010 9:07 PM | Report abuse

Jason, you mentioned today's "stickiness" in your post, but it really wasn't that bad...the dew point at DCA is still 59 at this hour. As the high moves off the coast and becomes another one of those Bermuda Highs tomorrow, that 59 dew point won't stay long.

Posted by: MMCarhelp | June 26, 2010 9:17 PM | Report abuse

@MMCarHelp

Disagree: Dew points were in the mid-to-upper 60s from late morning through mid-afternoon. If you were outside during that time period, was definitely "sticky" -- even if dew points dropped late afternoon.

Posted by: Jason-CapitalWeatherGang | June 27, 2010 12:02 AM | Report abuse

It sure been a hard, hard winter
My feet been draggin' 'cross the ground
And I hope it's gonna be a long, hot summer
And the light of love will be burnin' bright

Posted by: blasmaic | June 27, 2010 3:59 AM | Report abuse

The comments to this entry are closed.

 
 
RSS Feed
Subscribe to The Post

© 2012 The Washington Post Company