Flash Flood Warning 16, NWS Glasgow, MT

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
820 PM MDT TUE JUL 17 2001

...SEVERE THUNDERSTORM WATCH FOR ENTIRE CWA THROUGH 10 PM...

STRONG STORMS CONTINUING OVER WEST CENTRAL PORTIONS OF CWA ATTM.
STRONGEST INSTABILITY REMAINS OVER FAR EASTERN ZONES. WILL BE A RACE
TO SEE IF UPPER LEVEL DYNAMICS CAN MAKE IT THERE BEFORE DIURNAL
COOLING BEGINS. EXPLOSIVE THUNDERSTORM DEVELOPMENT NORTH OF SHERIDAN
COUNTY IN CANADA HAS ME A BIT CONCERNED. INSTABILITY AXIS LIES ALONG
NORTH DAKOTA BORDER SOUTH OF THIS STORM. ALTHOUGH NOT BEING
INDICATED WELL ON RADAR. STORMS JUST NOW BEGINNING TO FIRE OVER
RICHLAND COUNTY (CAN SEE THEM OFF TO THE EAST OUT OF WINDOW). IF
THESE STORMS SHOW THE SAME EXPLOSIVE DEVELOPMENT AS THE CANADIAN
STORM...COULD HAVE A LONGER THAN EXPECTED EVENT. WILL LEAVE
WATCH/ZONE ARRANGEMENT ALONE FOR NOW.   POHL

EXTENDED...UPPER LOW REMAINS OVER ALBERTA UNTIL SAT WHEN IT MOVES
EAST AS AN OPEN TROF. THEN AN UPPER TROF DEVELOPS OVER WEST COAST
OVER THE WEEKEND THAT CONTINUES INTO EARLY NEXT WEEK. EXCEPT FOR A
BRIEF PERIOD ON SUNDAY...ERN MT IS IN SW FLOW ALOFT FOR THE ENTIRE
EXTENDED PERIOD WITH FREQUENT SHORTWAVES. GIVEN THE UNSETTLED
PATTERN...WILL NEED TO MENTION A CHANCE OF THUNDERSTORMS EACH DAY.
FORRESTER

KGGW 062/084 060/085 062/082 058/083 056/085 058/084 061/085
      TTTBBBB  793323/7933333
KGDV 063/085 061/085 061/085 057/085 058j/085 058/084 060/084
      TTTBBBB  794423/7933333

MTZ016-021-059-060-180430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
1000 PM MDT TUE JUL 17 2001

THE NATIONAL WEATHER SERVICE HAS CLEARED A PORTION OF SEVERE
THUNDERSTORM WATCH NUMBER 565. AREAS CLEARED FROM THE SEVERE
THUNDERSTORM WATCH INCLUDE:

IN NORTHEAST MONTANA:

PETROLEUM             PHILLIPS

THIS INCLUDES THE CITIES OF MALTA...WHITEWATER...WINNETT AND ZORTMAN.