Severe Thunderstorm Watch 207

Issued

May 26, 2021, 1:27 PM MDT (19:27 UTC)

Expired

May 26, 2021, 9:00 PM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Rapid City radar (KUDX), 176 km from the middle of the area, began a volume at 19:30 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

20%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 747 Severe potential...watch likelyMay 26, 11:45 AM MDT
• Mesoscale Discussion 755 Tornado watch 209...210May 26, 4:44 PM MDT
• Mesoscale Discussion 756 Severe thunderstorm watch 207May 26, 5:48 PM MDT

464 
WWUS20 KWNS 261923
SEL7  
SPC WW 261923
NEZ000-SDZ000-WYZ000-270300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 207
NWS Storm Prediction Center Norman OK
125 PM MDT Wed May 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Western Nebraska
  Southwest South Dakota
  Eastern Wyoming

* Effective this Wednesday afternoon and evening from 125 PM
  until 900 PM MDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 80 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms are expected to develop and intensity this
afternoon over eastern Wyoming and spread eastward across the watch.
 Very large hail and damaging winds are expected with the most
intense cells.  An isolated tornado or two are also possible.

The severe thunderstorm watch area is approximately along and 95
statute miles east and west of a line from 80 miles northwest of
Chadron NE to 20 miles east southeast of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 205...WW 206...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.

...Hart

Severe Thunderstorm Watches in Nebraska, 2021Severe Thunderstorm Watches in Wyoming, 2021Severe Thunderstorm Watches in South Dakota, 2021Every severe thunderstorm 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.