WATCHES: Severe Thunderstorm Watch Number 419

WWUS20 KWNS 022008
SEL9
SPC WW 022008
MTZ000-030300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 419
NWS STORM PREDICTION CENTER NORMAN OK
210 PM MDT THU JUN 2 2011

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

EASTERN MONTANA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH
NORTHEAST OF GLASGOW MONTANA TO 15 MILES SOUTH SOUTHEAST OF MILES
CITY MONTANA. 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 TORNADOES.

DISCUSSION...A LINE OF STRONG/SEVERE THUNDERSTORMS CURRENTLY EXTENDS
FROM EAST OF HVR TO WEST OF MLS. THESE STORMS ARE ASSOCIATED WITH
STRONG LARGE SCALE FORCING MOVING ACROSS MT. ACTIVITY WILL LIKELY
PERSIST AND TRACK NORTHEASTWARD ACROSS THE WATCH THROUGH THE EARLY
EVENING. MODERATE INSTABILITY AND STRONG EFFECTIVE SHEAR WILL
PROMOTE A RISK OF SUPERCELLS CAPABLE OF LARGE HAIL AND DAMAGING
WINDS.

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 24035.

...HART

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