URGENT – IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 473
NWS STORM PREDICTION CENTER NORMAN OK
555 PM MDT THU JUL 5 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
FAR SOUTHEAST MONTANA
WESTERN AND WEST CENTRAL SOUTH DAKOTA
FAR NORTHEAST WYOMING
EFFECTIVE THIS THURSDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT MDT.
TORNADOES…HAIL TO 2.5 INCHES IN DIAMETER…THUNDERSTORM WIND
GUSTS TO 85 MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH OF BUFFALO
SOUTH DAKOTA TO 75 MILES SOUTH SOUTHWEST OF PHILIP SOUTH DAKOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).
REMEMBER…A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
OTHER WATCH INFORMATION…CONTINUE…WW 470…WW 471…WW 472…
DISCUSSION…TSTMS EXPECTED TO CONTINUE STRENGTHENING AND INCREASING
IN EXTENT THROUGH LATE TNGT OVER WRN SD REGION…IN ZONE OF
SUSTAINED/MOISTENING LOW LVL SELY FLOW ASSOCIATED WITH UPR IMPULSE
CROSSING THE NRN RCKYS. PER DISCUSSION IN EARLIER SVR TSTM WATCH
#472…INCREASING UPR LVL DIVERGENCE AND STRENGTHENING LOW TO MID
LVL SHEAR RELATED TO UPR IMPULSE WILL YIELD AN ENVIRONMENT FAVORABLE
FOR LOW LVL MESOCYCLONES AND POSSIBLY TORNADOES…ESPECIALLY WITH
ANY MORE DISCRETE STORMS.
