Tornado Watch 482

Issued

Sep 1, 2021, 11:46 AM EDT (15:46 UTC)

Expired

Sep 1, 2021, 9:00 PM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Sterling radar (KLWX), 93 km from the middle of the area, began a volume at 15:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

60%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 1668 Severe potential...tornado watch likelySep 1, 11:03 AM EDT
• Mesoscale Discussion 1669 Tornado watch 482...483Sep 1, 1:32 PM EDT
• Mesoscale Discussion 1671 Tornado watch 482...483Sep 1, 3:09 PM EDT

677 
WWUS20 KWNS 011536
SEL2  
SPC WW 011536
DCZ000-MDZ000-NCZ000-VAZ000-CWZ000-012300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 482
NWS Storm Prediction Center Norman OK
1140 AM EDT Wed Sep 1 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  District Of Columbia
  Central to eastern Maryland
  Far northeast North Carolina
  Northern to eastern Virginia
  Coastal Waters

* Effective this Wednesday morning and evening from 1140 AM until
  700 PM EDT.

* Primary threats include...
  A few tornadoes likely
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Several lower-topped supercells should develop within
clusters that spread east-northeast this afternoon.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 45 miles north northwest of Baltimore
MD to 30 miles southwest of Norfolk VA. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24025.

...Grams

Tornado Watches in Virginia, 2021Tornado Watches in Maryland, 2021Every tornado watch in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.