Wednesday, September 12, 2007

DC: Delightfully Comfortable


Clear, warm, low humidity. The last time this headline appeared in PM Update was May 22. Unless you're a lawn, a garden, a farm field, or someone economically dependent on one of those things, it's a delightfully sunny and dry day in the National Capital region. After hitting an official low of 64° (59° at Dulles), temperatures have rebounded mainly to the upper 70s and some low 80s under crystal clear blue skies this afternoon. By 4pm, National had reached at least 79°. Dewpoints are in the extremely comfortable mid and upper 40s. chart from NWS data, photo © Kevin Ambrose

Tonight and Tomorrow

Clear and comfortable. With clear skies, light winds, and low humidity, temperatures should be able to drop to the upper 50s downtown and the low and mid 50s in the 'burbs with some upper 40s in outlying areas. Tomorrow will again be sunny and warm with low humidity, highs 78-83°.

For the outlook through the rest of the week into the weekend, scroll on down to Dan's post below.

Tropical Topics

A stormy area off the Texas coast and the tropical wave in the Atlantic mentioned yesterday were vying to be the next tropical cyclone, and they were each declared tropically depressed at 11am this morning. The Texas one has gone on to become Tropical Storm Humberto. It's too close to the coast to develop much stronger winds, but its slow movement will pose the threat of considerable flooding to the Houston area. The mid-afternoon Houston radar, courtesy of, shows a very small, but well-developed circulation.

Tropical Depression 8 (Ingrid wannabe) is expected to strengthen to a tropical storm in the next couple of days but not to intensify rapidly after that as it aims toward the northern Caribbean islands.

Gabrielle is gone, but apparently there was quite a commotion in the blogosphere over the weekend regarding some highly hyperbolic scenarios for the East Coast. That was not the case here (see Friday's PM Update), although one local broadcast outlet was observed on multiple occasions at least partially buying in to the alternate reality of some outlier models. The Weather Channel's Stu Ostro has a very nice recap of the situation in his blog posting, "Getting Wiggy with Gabrielle".

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Seasonal Outlook

Latest seasonal forecast: Click here.

Latest 3-month temperature outlook from Climate Prediction Center/NWS/NOAA.