Severe Thunderstorm Watch 621

Issued

Aug 25, 2019, 9:33 PM MDT (03:33 UTC)

Expired

Aug 26, 2019, 4:57 AM MDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

Counties Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Garfield County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE, Wheeler County, NE

The North Platte radar (KLNX), 67 km from the middle of the area, began a volume at 03:34 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

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1860Aug 25, 8:49 PM MDT
• Mesoscale Discussion 1861Aug 26, 12:05 AM MDT
• Mesoscale Discussion 1863Aug 26, 2:35 AM MDT

895 
WWUS20 KWNS 260329
SEL1  
SPC WW 260329
NEZ000-261100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 621
NWS Storm Prediction Center Norman OK
930 PM MDT Sun Aug 25 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern Nebraska

* Effective this Sunday night and Monday morning from 930 PM
  until 500 AM MDT.

* Primary threats include...
  Isolated significant damaging wind gusts to 75 mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...An isolated intense severe thunderstorm will initially
impact far northwest Nebraska late this evening, with additional
development and a general expansion of storms expected into the
overnight. Large hail will be possible on an isolated basis, and
severe-caliber wind gusts would be an increasing concern as storms
potentially form into a well-organized southeastward-moving line.

The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 20 miles north of
Alliance NE to 20 miles east southeast of Oneill NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

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 620...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
31025.

...Guyer

Severe Thunderstorm Watches in Nebraska, 2019Every severe thunderstorm watch in 2019

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.