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Posted at 3:20 PM ET, 09/15/2010

PM Update: It's just really nice out there

By Ian Livingston

Brief shower risk late Thurs before more splendid weather

* Will hurricanes keep avoiding the U.S.? | Hurricane Tracking Center *
* Outside now? Radar, temperatures & more: Weather Wall *

The worst part about this string of weather is it's getting hard to describe how nice it is. I mean, it is pretty great, but after a while a weather lover starts to hope for something a little more "extreme" to talk about. Alas, there's none of that in the forecast. So, let's just enjoy the beauty of this time of year and hope for some needed rain late tomorrow and tomorrow night.

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.

Through Tonight: Another super evening is ahead. Temperatures fall from highs in the the low-to-mid 80s back toward the low-to-mid 70s around sunset. Lows eventually reach the mid-or-upper 50s in the suburbs and the lower 60s downtown. Skies should be mostly clear much of the night with some periods of partly cloudy possible.

Tomorrow (Thursday): Most of Thursday is looking mighty fine if also a smidge warmer than today. Mostly sunny skies early transition cloudier late and mid-80s should do it for highs most spots, but upper 80s aren't totally out of reach with enough sun. By evening, a few showers or even a thunderstorm may move in as a cold front approaches. A risk for a few showers probably persists through about midnight. Rainfall amounts should be light.

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

Local climate: With about 1 week until astronomical fall begins, the stepdown in temperatures is well underway. Today is the last day at D.C. with an average high of 80 or higher until May 30. D.C.'s average low drops into the 50s on the 23rd of this month, and by this time next month the average high is only 68 with an average low of 50!

By Ian Livingston  | September 15, 2010; 3:20 PM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Hurricanes keep avoiding U.S., will it continue?
Next: Forecast: Summery today, a little p.m. rain


4 those of u who like warm dry weather, the next 8-9 days will make u happy. No rains of significance in sight. Not good news 4 the farmers, bushes, yards or trees, but great news 4 all u dance fans.
Risk of brush fires is going up each day, & if your smoker, please use your ash trays, the roadsides r not your personal dumping ground.

Posted by: VaTechBob | September 15, 2010 4:27 PM | Report abuse

Yes, it's quite beautiful, and after those (many) 90 degree days, I'm not complaining,


it's still pretty hot standing on a playground with 28 kindergarteners! Bring on the fall! :-)

Posted by: dinergirl1 | September 15, 2010 6:51 PM | Report abuse

Was Julia a Cat 4 hurricane earlier today, before weaking to a 3? Newscasters are saying this is the first time there have been two Atlantic Cat 4s since 1926.

I thought categories were developed in 1971 and introduced in 1973, so it sounds like the Saffir-Simpson scale has been "retrofitted" to 1926.

Posted by: JerryFloyd1 | September 15, 2010 7:41 PM | Report abuse


Yes-- Julia was a Cat 4 earlier. See Greg Postel's post from earlier today-- where we also mentioned the only second time two Cat 4s simultaneously stat...

Posted by: Jason-CapitalWeatherGang | September 15, 2010 8:58 PM | Report abuse

Anyone else less comfortable this evening because of the slowly-creeping-higher dewpoint? :P

Posted by: Camden-CapitalWeatherGang | September 15, 2010 11:01 PM | Report abuse

There are signs of higher dewpoints out there--fewer crickets huddling into warmer moist areas after dark tonight.

Yes, JerryFloyd1, both the Saffir/Simpson and the various Fujita scales seem to have been "retro-fitted" to cover hurricanes & tornadoes from days gone by...the criterion appears to be damage analysis. What gets me is that neither scale is "open-ended" like the Richter and Mercalli earthquake damage scales. This could be done for the Saffir/Simpson scale by upgrading each category by 25-mph wind increments. As for the Fujita scale, I've always been inclined to regard the Mar. 18, 1925 Tri-State tornado to be at least an "F6" or "EF6", as this particular tornado appears to have been in a category all its own--there has never been a recorded tornado before* or since [to date] that has exceeded the Tri-State tornado in ferocity. As it stands now, the Tri-State tornado is certainly an EF5.

*One caveat: The second tornado to hit Irving, KS on May 30, 1879 may also have qualified for "F6/EF6" status in my opinion. This tornado appeared as a "cloud of inky blackness" and no funnel was seen, indicating that the complete mesocyclone/shelf cloud extended to the ground, as with the Tri-State tornado. However the path of the Irving tornado was not as long as that of the Tri-State tornado.

Posted by: Bombo47jea | September 16, 2010 12:28 AM | Report abuse

@Jason, Bombo, thanks. I also wonder how applying a standard adapted in 1973 to past hurricanes, esp. before hurricane hunter planes began flying into the storms and measuring wind speeds. So often the anemometers could only measure up to a certain wind speed or the towers that held them blew away (as happened during Andrew). Coming up with a number storm based on damage is somewhat iffy, unless the damage is really widespread.

Posted by: JerryFloyd1 | September 16, 2010 6:38 AM | Report abuse

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