Wednesday, July 11, 2018

An Early Afternoon Middle-of-the-Week Update: High Summer, Low Doldrums

Evening sunlight filtered through leafy trees, 
2000 block New Hampshire Ave NW, Washington, D.C., 7:15 p.m. July 7, 2018.

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Apologies for lack of entries since the wee hours of Sunday morning.

I've been trying to post an entry in the meantime, one that despite myself, morphed into a political-themed one and that I simply could not finish. That being the case, I'm just going to post the weather portion of it.

CORRECTION 12:24 a.m. 7/13/2018: This is the house at 1716 New Hampshire Ave NW, Washington, D.C.; see update here.

Trees cloaking the Eastern Star headquarters,
1600 block New Hampshire Ave NW,
Washington, D.C., 7:26 p.m. July 7, 2018.

This is actually the old Perry Belmont House that is today the intergalactic world headquarters of the General Chapter of the Order of the Eastern Star (a Masonic organization).

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The following is the weather portion alone from last night …

I'm back from the gym -- my second night going there -- and watching the late-night MeTV old-school line up. The second Hogan's Heroes episode -- "Gowns by Yvette" -- was hilarious. The Perry Mason episode is "The Case of the Duplicate Case." The one last night was "The Case of the Gambling Girl."

I've really grown to like Perry Mason in its reruns from 60 years ago (before I was born).

It is a very warm, dry night with 11 p.m. of 87F and the dew point down to 59F at KDCA with a mostly dry cold frontal passage set to occur in the wee hours.

This followed another frickin' cloudlessly, blazingly sunny day -- the fifth in a row -- but with hotter temperatures that climbed into the middle 90s Fahrenheit (see below for today's highs) with dew points back into the 60F to 65F range. More to the point, there is still no real rainfall in sight.

Preliminarily, the high temperatures for today (July 10th) were as follows:

KDCA: 96F
KBWI: 95F
KIAD: 93F
KDMH: 97F

Given the time of year, these are no where near daily records for the three airports. Indeed, the KBWI daily record of 107F set on July 10, 1936-- from the pre-BWI Airport period when records were kept in downtown Baltimore (at the U.S. Custom House)  marks the all-time highest official air temp ever for the city.

For KDMH, it is indeterminate since its record period only goes back to April/May 1998.

The pattern become more standard summery with a daily chance of afternoon and/or evening showers / t-storms by next week.

Of note, last week there was a short (two-day) but intense heat wave in Southern California that resulted in record high temperatures including some all-time high temperatures being set.

Los Angeles - Oxnard NWS Forecast Office (LOX) NWS infographic for L.A. area July 6, 2018 record high temperatures for listed locations, UCLA corrected.

The NWSFO identifier is "LOX" while the big airport abbreviation is "LAX." Got it?

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As noted in this CWG entry, downtown L.A. (KCQT) officially reached 108F on July 6th and 104F on July 7th.

The 108F on July 6th blew away the daily record of 94F but was well short of the all-time record of 113F set in September 2010. However, UCLA reached 111F -- an all-time record high surpassing the 109F set on Sept. 20, 1939 (it has a record period stretching back to 1933).

Both Hollywood Burbank Airport and Van Nuys Airport also set all-time record highs at 114F and 117F, respectively. Riverside tied its all-time record high of 118F from 1925.

The intense heat resulted in a massive electricity demand that actually caused power outages in the Los Angeles area. The Los Angeles Times reported a peak energy demand on Friday of 6,256 megawatts on Friday, easily surpassing the previous July record of 6,165 megawatts set in 2006 and the 5th highest demand ever.

The same CWG entry linked discusses how vast was the heat dome across the United States in terms of geopotential heights.

12Z 7/6/2018 GFS showing 500mb height anomalies in dekameters (dam) color coded over the Lower 48 U.S. and parts of Canada valid hour 0 (i.e., initialized).

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The pattern in the Southwest has shifted to a more "typical" July monsoon one featuring late afternoon / evening thunderstorms -- some that kick up awesome-looking haboobs in Arizona -- with some actual "weather" making it at least into the mountains of Southern California, if not the coastal areas.

San Diego NWS Forecast Office (SGX) infographic for July 10, 2018.

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Another weather story is the tremendous flooding rains in Japan that have claimed at least 155 lives with another 50 missing. (The death toll is likely to rise.) Between July 2nd and 9th, rainfall totals of 6 to 12 to as much as 30 inches of rain have occurred in parts of southwestern Japan in mountainous Okayama prefecture and around Hiroshima and the resulting mudslides have been devastating.

Radar-estimated rainfall in millimeters for southwestern Japan for the period July 2 - 9, 2018.

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Aerial flooding of the historic city of Kurashiki, western Okayama Prefecture, July 7, 2018.

The city sits along the Takahashi River, which has badly flooded.

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OK, so I need to get into the office.

For tonight, I'm not going to the gym, but neither am I stopping at Trade after work. I need to get home as quickly as possible -- although I'm unsure if I'll stop for dinner somewhere first.

Blue sky and old buildings, alley, Georgetown, Washington, D.C., 6:32 p.m. July 8, 2018.

I had gone to Martin's Tavern earlier with Wendy (more on that in a subsequent entry) and then stopped at Sovereign.

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I have to be in bed by 11 p.m., as I need to be up early tomorrow (no later than 7 a.m.) in order to get myself up, ready, and out to NIST via the Shady Grove Metro (and thence a shuttle). There is an agency workshop that I need to attend tomorrow.

M Street and Pennsylvania Ave NW, Georgetown, Washington, D.C., 6:40 p.m. July 8, 2018.

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I may or may not post an entry tonight depending on the amount of time I have. If not, then the next one won't be until Friday.

-- Regulus

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