Most Read: Local

Posted at 09:00 PM ET, 06/18/2011

Forecast: Some sun and some storms

9 p.m. Update: Latest models suggest tomorrow (Father’s Day) may be cloudier with a better chance of showers than previously advertised, especially during the morning into early afternoon. Temperatures are probably cooler than first thought as well, around 80 to the mid-80s. Forecast confidence is on the low side, so check back with us in the morning.

From 5 a.m...

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

 
A touch warmer & more humid than Friday, but otherwise slightly better than par for the course; maybe a late-day storm or two.
 
Get the 'Digit' on Twitter
EXPRESS FORECAST

Today: Partly sunny. 30-40% chance of p.m. storms. Upper 80s to near 90. | Tonight: Chance of storms. Upper 60s to low 70s. | Tomorrow: Partly sunny. 30% chance of showers/storms. Mid-80s to near 90. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

Warm and humid air, a stationary front, and the weekend. That, my friends, is a frustrating combination. Because it means a significant degree of uncertainty as to when and where showers and thunderstorms may form along or near the front, though if we’re lucky we’ll stay mostly dry for a good portion of the daytime hours today and tomorrow. This same pattern sticks around until Tuesday, when storm chances probably decrease but heat may begin to increase.

Today (Saturday): After the chance of a leftover early-morning shower or storm, it’s kind of typical as summer Saturdays go. We're partly sunny and fairly humid with highs in the upper 80s to near 90, and a 30-40% chance of showers or storms as we get toward and into the mid-to-late afternoon. Like we’ve seen the past couple days, any storms are probably hit-or-miss, so hard to predict what (if any) impact there might be on the U.S. Open. Confidence: Medium

Thundercast:

Probability: 30-40%
Coverage: Scattered
Most Likely Timing: After 1 p.m.

Severe Weather Tracking Station
Warning Text: DC | MD | VA * NWS Local Storm Reports
Radar & Lightning: Movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here to see radar bigger.
    
LWX Warnings
Warnings: Severe alerts from National Weather Service. Updates w/o refresh (most browsers). Hint: Alert on map? Click matching label in key for details.

Tonight: We’ll hold on to that general 30-40% chance of showers or storms into the evening. But we also need to watch for an organized area of showers and storms that may come through the area from the west during the late evening or overnight, or it might skirt south of the area. Partly to mostly cloudy skies keep temps from dropping too far - expect lows in the upper 60s to low 70s . Confidence: Low-Medium

Keep reading for the forecast into the coming week...

Tomorrow (Sunday): A similar setup to Saturday produces similar results. Any showers/storms lingering from the overnight activity should clear out during the early morning. But mugginess remains as highs top out in the mid-80s to near 90, and the mid-to-late afternoon brings a 30% chance of showers or storms. Confidence: Medium

Tomorrow night: This is going to sound eerily similar to tonight’s forecast: The 30% chance of showers or storms continues into the evening, and late evening or overnight there’s the potential for an organized area of showers/storms to come at us from the west. Lows are in the muggy upper 60s to low 70s again under partly to mostly cloudy skies. Confidence: Low-Medium

A LOOK AHEAD

On Monday we run the risk of any overnight showers and storms lingering into the morning commute. The midday likely brings a lull in the rain threat as highs head for the mid-80s to near 90 under partly sunny skies, before shower and storm chances return again from mid-afternoon into Monday night. Confidence: Low-Medium

High pressure centered to our south tries to nose its way northward Tuesday and reduce our shower/storm chances to around 20%. There’s a catch, though, as the higher pressure sets the stage for a potential stretch of more meaningful heat. Highs aim for near 90 to the low 90s Tuesday, and may soar well into the 90s Wednesday, the first full day of summer. Confidence: Medium

By  |  09:00 PM ET, 06/18/2011

Categories:  Forecasts

 
Read what others are saying
     

    © 2011 The Washington Post Company