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Aug 3, 2020 4 tweets 3 min read Read on X
#Isaias and DC-MD-VA! Short thread...
* Tropical storm and flash flood watch out for large parts of the region
* High confidence in heavy rain. NWS has INCREASED our rain forecast to 4-6" along I-95 corridor, 2-4" to west, 5 to 7" east. (1/x) Image
Heaviest rain from #Isaias in DMV expected Mon night to Tues evening.

Strongest winds forecast Tuesday afternoon - esp in the afternoon as core of storm comes closes. Expect strongest winds (30-55 mph gusts) EAST of I-95 near Bay and Delmarva unless storm shifts west. (2/x) Image
Models pretty consistent forecasting #Isaias to track east of DC. But rain & winds will expand as it merges with stalled front & is captured by jet stream.
In unlikely event storm takes more western route, would increase chance of tropical storm winds in immediate DC area. (3/x) Image
Main concerns for #Isaias in DMV:
* Flooding rain overnight Mon into Tues
* Combo of rain and wind near Bay/Delmarva causing downed/trees outages
* Coastal flooding from minor surge (1-3') Old Town, SW Waterfront, Annapolis
Detailed briefing: wapo.st/3k1LSVb (4/4)

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More from @capitalweather

Sep 1
Maps, we love maps. They help tell the story of the summer.

First, here are all of the locations which had one of their top 5 hottest summers - June thru Aug - on record. DC is among them.

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Here all the places that highs of 100+ and the number of times. Some places in the Southwest like Phoenix and Yuma were 100+ pretty much every day.

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Aug 7, 2023
⚠️DC area: We expect intense storms that could produce damaging or destructive winds -- especially in 5-7p window in immediate area.

Our detailed brief is up. Read it and share it:


Will thread some key points... 1/xwashingtonpost.com/weather/2023/0…
We are under a level 4 out of 5 risk. The last time that happened locally was June 13, 2013; the previous time before that was the June 29, 2012 derecho. So the @NWSSPC sees ingredients in place for numerous dangerous storms in the area.

2/x Image
@NWSSPC We're most concerned about:
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2) Quick-hitting tornadoes -- a lower chance than downburst winds but possible

3/x Image
Read 5 tweets
Jun 23, 2023
Communities are taking part in a radical revolution — of our lightbulbs. Bulbs are being swapped for more energy-efficient brighter LED lights.

But the rise of LEDs creates new issues for our night sky & health.

By @KashaPatel, @sadbumblebee, @kt_prry: wapo.st/3r3mNB3
Common types of LED lights emit more blue light than traditional high-pressure sodium bulbs. Differences are seen in this 2020 image from the Space Station. Bluer LEDs appear in Baltimore, while older amber-colored lights spread across D.C.

More: https://t.co/7TyF7WcYnCwapo.st/3r3mNB3
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📷@PostGraphics w/National Park Service data https://t.co/xtVNOw2KlCwapo.st/3r3mNB3
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New York City, Detroit and Toronto rank among top 12 cities in the world for bad air quality currently. 2/ Image
The source of the smoke is wildfires in Quebec, which erupted late last week amid record heat. 3/

Read 7 tweets

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