PM Update: Hot and humid yet again Friday; was GOES satellite hit by “micrometeoroid”?

* Code orange air quality alert Friday: unhealthy for sensitive groups *


Radar & lightning:Latest D.C. area radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

It wasn’t the healthiest day to be outdoors, with high UV, high pollen levels, and bad air quality.  The hot, (partly) sunny weather had a lot to do with all of this, and we get another dose of it Friday.

Through Tonight: There’s a slight (10-20 percent) chance of an evening thundershower (any activity should die quickly around sunset).  Otherwise it’s partly cloudy and mild, with lows 63-71 (suburbs-city).  Light winds from the south.

Tomorrow (Friday): Just like today, it’s partly to mostly sunny, with the outside (10 percent) chance of a late day thundershower.  It’s hot and moderately humid, with highs 90-94 – making a likely third straight day of 90 or higher (high Wednesday and today was 90 at Reagan National). Winds are from the south at 5-10 mph.

See David Streit’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

Pollen: Tree counts are HIGH, grasses HIGH, weeds LOW, and mold spores MODERATE.

Dysfunctional weather satellite may have been hit by “micrometeoroid”: The Aerospace Daily & Defense Report says the cause of the GOES-13 weather satellite outage may have been a space-borne object. It writes:

Because the satellite appears healthy, officials are considering the possibility of an “external disturbance” — a micrometeoroid collision — causing an “attitude disturbance” in the satellite’s orbit 22,300 mi. over the East Coast, says Ron Mahmot, the mission operations division manager for GOES at NOAA.

Read more: GOES Control Problem Could Be Due To Micrometeroid Collision

Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
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45
90-degree days year-to-date
Yearly Average
36
Record Most
67 (1980,2010)
Record Fewest
7 (1886,1905)
Last Year
24

At a Glance

Tue.

partlycloudyday
72° /93°

Wed.

thunderstorms
75° /93°
Drop 20%

Thu.

partlycloudyday
76° /92°

Fri.

thunderstorms
74° /91°
Drop 30%

Sat.

partlycloudyday
71° /85°

Sun.

partlycloudyday
68° /88°
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Jason Samenow · May 30, 2013

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