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EXPIRED Severe Thunderstorm Watch #0613 for Northeast Colorado, Extreme northwest Kansas, Extreme southwest Nebraska
  • Scattered damaging winds and isolated significant gusts to 75 mph possible
  • Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible
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EXPIRED Severe Thunderstorm Watch #0613

Locations Affected

  • Northeast Colorado
  • Extreme northwest Kansas
  • Extreme southwest Nebraska

    • Severe Thunderstorm Watch Summary

    Initial supercells in the southwest Nebraska Panhandle will tend to grow upscale into a cluster while moving south-southeastward across northeast Colorado and adjacent areas of Kansas/Nebraska. Isolated very large hail up to 2.5 inches in diameter will be possible prior to upscale growth, while the threat for severe outflow gusts of 60-75 mph will increase some once clustering occurs.

    Severe Weather Threats

  • Scattered damaging winds and isolated significant gusts to 75 mph possible
  • Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible

    • Severe Thunderstorm Watch Details

    SEL3

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 613
NWS Storm Prediction Center Norman OK
815 PM MDT Fri Aug 21 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northeast Colorado
  Extreme northwest Kansas
  Extreme southwest Nebraska

* Effective this Friday night and Saturday morning from 815 PM
  until 100 AM MDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible

SUMMARY...Initial supercells in the southwest Nebraska Panhandle
will tend to grow upscale into a cluster while moving
south-southeastward across northeast Colorado and adjacent areas of
Kansas/Nebraska.  Isolated very large hail up to 2.5 inches in
diameter will be possible prior to upscale growth, while the threat
for severe outflow gusts of 60-75 mph will increase some once
clustering occurs.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 60 miles north northeast
of Akron CO to 10 miles southeast of Burlington CO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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 610...WW 612...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
34025.

...Thompson

    National Risk Overview

    Saturday, August 22
    TORNADO: low
    HAIL: 5%
    WIND: 15%
    Sunday, August 23
    TORNADO: low
    HAIL: 5%
    WIND: 5%
    Monday, August 24
    ANY SEVERE: 5%
    Tuesday, August 25
    ANY SEVERE: predictability too low
    Wednesday, August 26
    ANY SEVERE: predictability too low
    Thursday, August 27
    ANY SEVERE: predictability too low
    Friday, August 28
    ANY SEVERE: predictability too low
    Saturday, August 29
    ANY SEVERE: predictability too low

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