Summer Reruns

Now

Sunny, cooler, much less humid. The weather sometimes goes in cycles. Here's the PM Update from exactly one month ago: "The cold front which passed through in the early morning hours has brought with it sunny, cooler, and less humid conditions for the Washington metro area this afternoon. Temperatures at mid afternoon were generally in the low to mid 80s, dewpoints were in the much more comfortable 50s, and a refreshing northwesterly breeze was gusting to 25 mph at times."

Those words apply equally well today. At post time, National and Dulles are both at 84°, and the dewpoints are New-England-like 52° and 49° respectively. Even the light rainfall amounts from the frontal passage were comparable, although the exact totals this time were: National 0.06", Dulles 0.08", BWI 0.00".

For the outlook through the weekend, scroll on down to Camden's post below.

Book Nook

As PM Update also posted exactly a month ago, Chris Mooney, author of the new book, "Storm World", will be at Politics and Prose tomorrow night at 6:00. The book is profiled in the latest Wired magazine and was recently reviewed in the LaTi and IHT. The author was interviewed about the book in the HouChro earlier this week.

Chance of Storms, Then Cooler Weekend Ahead Watch Out for Falling Googlenopes

* Severe Thunderstorm Watch in Effect until 10pm *

Now

Warm, humid, scattered thunderstorms. Yesterday's forecast indicated that the chance of showers would increase today, but for many places, that increase has only been from none to slim. A midafternon storm brought strong winds and some downed trees to areas south of the Beltway, but National picked up only 0.05" of rain, and even about 20 minutes of a heavy thunderstorm was good for just 0.07" at Dulles. In this part of MoCo just a few miles north of the Beltway, the rain was barely enough to dampen the ground, despite the grumble of thunder. In the storm to the south, Quantico reported a wind gust to 63 mph.

Temperatures, which had reached at least 92° at National before the storm, were mainly in the 70s by 4pm where it had rained.

There is a chance of thunderstorms through this evening. Tomorrow will be a transition day on the way to what until this very moment was a Googlenope: "spectacular July weekend weather".

Tonight and Tomorrow

Warm, humid, chance of showers, then turning cooler. The chance of showers or thunderstorms, some possibly severe, is 50% through this evening. Mostly cloudy and humid conditions will continue overnight with lows in the mid 70s downtown to some upper 60s in the 'burbs. Clouds will decrease tomorrow along with lower humidity and highs 84-87°.

For the outlook through the weekend and beyond with Larson's Long-Range, scroll on down to Josh's post below.

Geek Chic

Ever wonder what kind of gear Sue Palka has at home? Today's WaPo Home section is packed with information for the home weather geek, from basic gear to weather vanes and data sources, including "a mind-numbingly comprehensive and entertaining look at Washington's weather."

Political Science

Today's House hearing on the Proenza affair at the National Hurricane Center was mainly a snoozefest, adding little to what is already known on the subject. Adm. Lautenbacher was clearly much more at home in the Congressional spotlight than ousted Director Proenza, but hardly any new light was shed on what really occurred. Committee Republicans were so persistent in their party-line refrain of, "Nothing to see here but a personnel matter, just move on," that it just raised more questions about what might have been covered up. The Academy Award for Most Juvenile Whining goes to former committee chairman [Non-]Sensenbrenner, who repeatedly attempted to derail the proceedings at the outset with demands that Proenza not be allowed to testify because his prepared remarks were not submitted in advance. Failing that, he then demanded that the Admiral be allowed to pull rank by testifying first. For more of the tedious details, check out the Miami Herald, "Proenza defiant despite critical storm center report".

Muggies for Muggles: They're Baack!

Now

Hot, humid, scattered showers. You don't need to be a weather wizard to notice that the muggies are back in town after a very brief hiatus. As Jason's dewpoint plot showed earlier, soup's on in the National Capital region. The increased juiciness was good for only a trace of precipitation around lunch time at both National and Dulles. The PM Update mobile unit observed a few drops near the northern portions of the Beltway in MoCo, but they could have been easily counted individually.

At mid afternoon, radar showed showers scattered from near Baltimore northeastward toward Philadelphia and across central New Jersey, but that activity has continued to diminish south of the Mason-Dixon line. Temperatures in the area currently range from the upper 80s to low 90s.

Mugginess will persist, and chances for showers and thunderstorms will increase for the next couple of days, but an extremely fine weekend for July continues to be shaping up.

Tonight and Tomorrow

Hot, humid, chance of showers. Hazy, warm, and humid conditions will continue through this evening, with only a 20% chance of an isolated shower or thunderstorm and lows in the mid to upper 70s in the city and low 70s to near 70° in the 'burbs. Tomorrow will again be hot and humid with a 40% chance of showers or thunderstorms in the late afternoon or evening. Highs will be in the range of 90-96°.

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

Mediarology

The first half hour of today's Kojo Nnamdi show on WAMU-FM discussed the management situation at the National Hurricane Center. Among the guests was the Miami Herald's 30-year veteran hurricane reporter Martin Merzer. If you missed the live broadcast, you can feed your audio device at the show's website.

Political Science

Continuing with the theme of tropical festivities, tomorrow's joint hearing regarding NHC by 2 subcommittees from the House Committee on Science and Technology will include oustee Bill Proenza in Panel I and ouster NOAA Adm. Lautenbacher in Panel III. At post time, the C-SPAN schedule did not indicate whether the hearings would be broadcast, but a webcast is scheduled on the committee website.

Today's Miami Herald article, "U.S. House to review storm-center probe", previews the hearing. The HouChro's SciGuy asks, "Where are the forecasters?" and has some earlier discussion as well.

Mugginess to Return After Short Respite

Now

Hot, but less humid. A bubble of drier air to the north of a "cold" front slid into the Mid Atlantic area overnight, bringing considerably more comfortable humidity (dewpoints 10-15° lower than yesterday) to the area, despite temperatures generally in the low 90s. By 5pm, National had reached at least 92°, and Dulles was 93°. As that front moves back northward, mugginess and the chance of thunderstorms will increase before a significant cooldown arrives for the weekend.

Surface/satellite/radar weather map at 2pm today from Intellicast

Tonight and Tomorrow

Increasing humidity, chance of showers. Comfortably warm and clear conditions this evening will lead to lows overnight in the low 70s downtown and the mid to upper 60s in the 'burbs. Mugginess will increase tomorrow, along with the chance (40%) of showers or thunderstorms late in the day. Highs tomorrow will be 89-92°.

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

Summer in the City

This week's WaPo "Secret Worlds of Summer" article, "The Life Aquatic" talks about the water lillies at Kenilworth Aquatic Gardens in Northeast Washington.

Mediarology

This week's episode of Tornado Diary focuses on storm chasing (WETA, Channel 26, 9pm).

Tropical Topics

Yesterday's blog post by TWC's Dr. Steve Lyons considers why tropical storms develop or not using a very interesting plexiglass analogy.

It ain't over yet: Today's Miami Herald reports, "Proenza hearing may stir new fury", that ousted Hurricane Center Director Bill Proenza and NOAA chief Adm. Lautenbacher are both scheduled to testify at Thursday's hearing of the House Committee on Science and Technology (Room 2318 Rayburn, 10am, for the Hill groupies).

Sultry, Not Stifling Showers Still Sought

Severe thunderstorm watch until 9pm

Now

Warm, humid. Dewpoints mainly in the mid 60s are at the lower end of the discomfort range, so temperatures near or at the 90° mark are not especially oppressive in the Washington metro area this afternoon. With proper hydration and UV protection, light exercise is certainly not out of the question.

Meanwhile, a stationary front draped east-west over most of the state of Maryland should help provide a focusing mechanism for showers and thunderstorms. At mid afternoon, however, the only significant storm activity was near and to the northeast of Charlottesville, but well south of I-66. By later in the afternoon, a smaller area of storms extended from the Frederick/Montgomery Co. line across the river to central Loudoun Co.

Tonight and Tomorrow

Continued warm and humid, chance of showers. After a 20% chance of showers or thunderstorms through this evening, mainly south of the District, lows tonight will be in the mid 70s downtown to the upper 60s in the cooler 'burbs. A few storms could be severe. Tomorrow will again be warm and humid with highs 89-94° and only a 20% chance of afternoon or evening thunderstorms.

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

Climate Corner

Yesterday's WaPo featured a page A1 article, "Climate Change Debate Hinges On Economics" by the paper's energy reporter. As several questions in this morning's live discussion indicated, the emphasis of the article was far more on the perceived political and economic costs of climate policy action as opposed to the much higher likely costs of inaction. A related podcast is also available. Extending the multimedia presentation, Tom Toles' cartoon today takes a stab at solving the carbon sequestration issue.

Today's WaPo science section was devoted to the first in a monthly series of articles called "Confronting a Changing Climate." The article, "Clues to Rising Seas Are Hidden in Polar Ice", discusses the possible consequences, as well as the uncertainties, of Greenland and Antarctic ice sheet melting. For an analysis of some Greenland ice research published just a couple of weeks ago, see the recent post at the RealClimate blog.

Tropical Topics

The National Weather Service's National Hurricane Center is issuing advisories on Hurricane Cosme in the eastern Pacific, but the Atlantic basin remains quiet.

An article, "Future forecasts face uncertainty", in Thursday's Miami Herald described the effects of "[a]ging equipment, cost overruns and delays in producing new satellites" on hurricane forecasting as discussed in last week's Senate Commerce Committee hearings.

DC: Deliciously Crisp

Now

Sunny, warm, low humidity. Thank you, Canada, for your favorite summer export. Following yesterday's somewhat skimpy showers in many places, the humidity began to drop in earnest around midnight, and by early this afternoon many locations in the metro area were reporting dewpoints in the very crisp upper 40s. Combined with temperatures in the mid 80s, relative humidities were in the low 30% range and less. A northwesterly breeze gusting over 20 mph at times just added frosting to the comfort concoction. Heat relief should last into the weekend.

Tonight and Tomorrow

Open the windows! If you haven't already done so, turn off the AC for a mostly clear and comfortable night. Lows should easily reach the mid 60s in the city and as low as the mid 50s in the outer 'burbosphere. Tomorrow should also be quite comfortable, but with some more clouds in the afternoon and a slight chance of showers or thunderstorms. Highs will be 83-87°.

For the outlook through the the weekend and beyond with Larson's Long-Range, scroll on down to Josh's post below.

Climate Clues: The Sun Also Falls

If you missed our preview Monday of an important new paper on the effect of solar activity on climate, it's now being featured more broadly in the press (although apparently not in the WaPo). The Beeb has an excellent summary, and there are articles at New Scientist online and the Wired science blog. Of course, if you really want to do your homework, the actual paper (pdf) is also available.

The cable noise networks and squawk radio like to dismiss climate change issues and especially greenhouse gas mitigation as "just politics", but an article, "Florida's Governor To Limit Emissions", on the front page of today's WaPo business section contradicts that viewpoint. (See also the Miami Herald). The Republican Gov. Crist of Florida is following the lead of the Republican Gov. Schwarzenegger of California in setting standards for greenhouse gas emissions from automobiles. Also in the same article is a description of the climate-change bill introduced yesterday with bipartisan support by Sen. Jeff Bingaman (D-N.M.).

Chart from Proceedings of the Royal Society, via BBC.

Tropical Troubles

The Florida Sun-Sentinel has a new interview today with former National Hurricane Center Director Proenza.

Scattered Storms, Then No Regrets

Now

Muggy, scattered showers. Once again, lunch time popup thunderstorms have knocked temperatures back down from earlier highs in parts of the metro area, while other places, especially to the north and west, have remained dry. National, which received 0.73" yesterday, got another 0.40" in today's storm, but Dulles and large parts of Montgomery County are still bone dry. Temperatures at mid afternoon varied widely from the low 80s where it had rained to 90° on the southern fringes of the region, such as Stafford and Culpeper.

Scattered storms, which are breaking out ahead of a cold front marching steadily eastward from the Ohio Valley, are likely to affect at least parts of the area through this evening, followed by cooler and drier conditions tomorrow.

Tonight and Tomorrow

Muggy, chance of thunderstorms, then less humid. After a 60% chance of showers or thunderstorms through this evening, skies will gradually clear towards morning with lows in the upper 60s in town to the low 60s in the 'burbs. Tomorrow will be mostly sunny and much less humid with highs 83-87°.

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

Rainfall Report

While National (0.73") and especially BWI (1.84") were in the bullseye for yesterday's storms, many area lawns and gardens are still feeling neglected. Most places north and west of the Beltway received little or no rain.

Precipitation in 24 hr. ending 8am this morning from NWS Experimental Precipitation Analysis.

Tropical Trouble

Today's WaPo Federal Diary recaps the National Hurricane Center Proenza affair, but as has been the case all along, the best reporting on the subject continues to be by Martin Merzer in the McClatchy Company's Miami Herald. Today's Herald article, "Proenza: I have no regrets", includes an interview with the former Director in which he refuses to apologize for his earlier criticism of NOAA, but does reaffirm his confidence in the capabilities of the NHC. The article says that Proenza has been ordered "not to communicate with the staff of the hurricane center in any way."

The issues with NHC are much more complicated than classic whistle-blowing, but it is becoming increasingly clear that "government science" is firmly establishing its position along with "military intelligence" in the ranks of oxymoronism.

Click on "Comment" below for more current links on Proenza.