SPC Severe Thunderstorm Watch 352

WW 352 SEVERE TSTM CO 232240Z – 240600Z

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 352
NWS STORM PREDICTION CENTER NORMAN OK
440 PM MDT SUN JUN 23 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  EASTERN COLORADO

* EFFECTIVE THIS SUNDAY AFTERNOON FROM 440 PM UNTIL MIDNIGHT MDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
    INCHES IN DIAMETER POSSIBLE
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A FEW TORNADOES POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
NORTHWEST OF AKRON COLORADO TO 50 MILES SOUTH SOUTHEAST OF LA
JUNTA COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 351...

DISCUSSION...TSTMS NOW FORMING OVER THE HIGHER TERRAIN OF CNTRL
CO...AND IN THE LEE OF THE RCKY MTN FOOTHILLS...EXPECTED TO INCREASE
AND MOVE/DEVELOP GENERALLY NEWD THROUGH LATE TNGT/EARLY MON AS
LOW-LVL SELY FLOW PERSISTS AHEAD OF APPROACHING DISTURBANCE ON SRN
FRINGE OF UPR JET. 35-40 KT WLY DEEP SHEAR SHOULD SUPPORT A FEW
SUSTAINED STORMS/SUPERCELLS WITH LARGE HAIL/LOCALLY DMGG WIND
DESPITE SOMEWHAT MODEST MOISTURE NOW PRESENT. INCREASING UPR-LVL
DIVERGENCE WITH THE CONTINUED ENE MOTION OF UPR IMPULSE...AND
ARRIVAL OF SOMEWHAT MORE SUBSTANTIAL BOUNDARY LAYER MOISTURE FROM
KS...SUGGEST THAT THE ACTIVITY COULD EVOLVE INTO AN E OR ESE-MOVING
CLUSTER BY MID-EVE.

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 24020.


...CORFIDI

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