

621 

WWUS20 KWNS 210600

SEL4

SPC WW 210600

COZ000-211100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 364

NWS STORM PREDICTION CENTER NORMAN OK

1200 AM MDT MON JUN 21 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEASTERN COLORADO



EFFECTIVE THIS MONDAY MORNING FROM MIDNIGHT UNTIL 500 AM MDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



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 COLORADO TO 45 MILES SOUTH SOUTHEAST OF AKRON

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 360...WW 361...WW

362...WW 363...



DISCUSSION...SUSTAINED STORMS/SUPERCELLS EXPECTED TO PERSIST IN NE

CO FOR THE NEXT SVRL HOURS HAS STRONG LOW LVL MOISTURE INFLOW

CONTINUES INTO REGION /PER SFC DATA AND GLD VWP/ BENEATH MODERATE

SWLY MID LVL FLOW.  POTENTIAL WILL EXIST FOR LARGE HAIL AND POSSIBLY

A TORNADO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24020.





...CORFIDI

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