WATCHES: Severe Thunderstorm Watch Number 395

WWUS20 KWNS 151935
SEL5
SPC WW 151935
COZ000-NEZ000-SDZ000-WYZ000-160300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 395
NWS STORM PREDICTION CENTER NORMAN OK
135 PM MDT FRI JUN 15 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHEAST COLORADO
NEBRASKA PANHANDLE
WESTERN SOUTH DAKOTA
EASTERN WYOMING

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 900
PM MDT.

HAIL TO 2 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 90 MILES NORTH OF
RAPID CITY SOUTH DAKOTA TO 45 MILES EAST SOUTHEAST OF COLORADO
SPRINGS COLORADO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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.

DISCUSSION...SCATTERED THUNDERSTORMS ARE FORMING OVER THE HIGHER
TERRAIN OF CENTRAL CO INTO SOUTHERN WY. OTHER STORMS ARE EXPECTED
TO DEVELOP SOON OVER WESTERN SD. SUFFICIENT VERTICAL SHEAR IS
PRESENT ACROSS THIS REGION FOR SOME CONVECTIVE ORGANIZATION AND A
RISK OF LOCALLY DAMAGING WINDS AND HAIL IN THE STRONGER STORMS.
EFFECTIVE SHEAR VALUES OVER SD ARE MORE SIGNIFICANT...AND WILL POSE
A GREATER RISK OF SUPERCELLS AND MORE WIDESPREAD HAIL/WIND.

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 27025.


...HART

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