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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 499
NWS Storm Prediction Center Norman OK
155 PM MDT Tue Sep 14 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
East central and southeast Colorado
* Effective this Tuesday afternoon and evening from 155 PM until
900 PM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Widely scattered storms are expected to move off the
higher terrain and intensify this afternoon through this evening.
The initial storms will likely be splitting supercells capable of
producing large hail of 1.5 to 2 inch diameter. Later this evening,
some upscale growth is possible into a cluster or two, with an
attendant threat for occasional severe outflow gusts as the storms
spread into southeast Colorado.
The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 20 miles northeast of
Limon CO to 45 miles west southwest of Springfield CO. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU9).
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
OTHER WATCH INFORMATION...CONTINUE...WW 498...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector