Severe Thunderstorm Warning 21, NWS Great Falls, MT

MTZALL-220400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS, MT
410 PM MDT FRI AUG 21 1992

...RECORD COLD EXPECTED OVER PORTIONS OF  EAST OF THE DIVIDE LATE
TONIGHT AND SATURDAY...
...SEVERE THUNDERSTORM WATCH ISSUED FOR EASTERN THIRD MONTANA LATE THIS
AFTERNOON AND EVENING...

COLDER CANADIAN AIR AND SOME LIGHT RAIN HAS BEGUN TO MOVE SOUTHWARD
INTO THE NORTHWEST CORNER EAST OF THE DIVIDE LATE THIS AFTERNOON.
AS THE COLDER AIR MOVES SOUTH TEMPERATURES WILL FALL TO RECORD
LOWS READINGS IN NORTH CENTRAL MONTANA DIPPING TO 35 TO 40 DEGREES
SNOW WILL BE OBSERVED IN THE HIGHER ELEVATIONS OF THE FRONT RANGE.
ON SATURDAY THE COOL AIR WILL SPREAD OVER MOST OF THE PLAINS EAST
OF THE DIVIDE WITH RECORD LOW TEMPERATURES AGAIN OCCURING IN NORTH
CENTRAL MONTANA.  COOL AIR WILL ALSO MOVE INTO THE NORTHERN PORTIONS
WEST OF THE CONTINENTAL DIVIDE.
IN THE MEANTIME...A SEVERE THUNDERSTORMS WATCH IS IN EFFECT
THIS EVENING FOR PORTIONS OF CENTRAL AND MOST OF EASTERN MONTANA.
AN UNSTABLE ATMOSPHERE OVER THE STATE IS COMBINING WITH STRONG
TEMPERATURE DIFFERENCES BETWEEN NORTHERN AND SOUTHERN MONTANA
TO BRING A THREAT OF STRONG THUNDERSTORMS...SOME CONTAINING STRONG
WINDS AND HAIL.

UNSEASONABLY COOL WEATHER WILL AFFECT MOST OF MONTANA OVER THE
WEEKEND AND INTO NEXT WEEK. SNOW SHOWERS MAY BE OBSERVED IN THE
HIGHER ELEVATIONS OF NORTHERN  MONTANA AND FROST MAY BE RECORDED
IN THE HIGHER ELEVATIONS BOTH SIDES OF THE DIVIDE.2

PERSONS ENGAGED IN OUTDOOR ACTIVITIES IN THE MOUNTAINS SHOULD
BE PREPARED FOR FALL LIKE WEATHER THIS WEEKEND.  PERSONS IN
EASTERN MONTANA SHOULD BE PREPARED FOR POSSIBLE SEVERE WEATHER
THIS EVENING.

OLSEN/BORSUM

MTC013-045-220030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
529 PM MDT FRI AUG 21 1992

A STRONG THUNDERSTORM WAS MOVING ACROSS SOUTHERN CASCADE COUNTY AT 525
PM MDT. IT WAS LOCATED ABOUT 15 MILES SOUTH OF GREAT FALLS NEAR EDEN, MT
AND WAS MOVING TO THE EAST AT 25 MPH. THIS THUNDERSTORM HAS PRODUCED PEA
SIZE TO HALF INCH SIZE HAIL.

PRESENT MOVEMENT WOULD TAKE THIS THUNDERSTORM INTO THE
RAYNESFORD...GEYSER AREA DURING THE NEXT HOUR. BRIEF HEAVY RAIN AND
SMALL HAIL ARE LIKELY WITH IT.

NO SEVERE WEATHER HAS BEEN REPORTED SO FAR THIS AFTERNOON ACROSS NORTH
CENTRAL MONTANA.  A SEVERE THUNDERSTORM WATCH CONTINUES UNTIL 10PM MDT
FOR THE EASTERN THIRD OF MONTANA.
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MTZ003-004-006-220115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
611 PM MDT FRI AUG 21 1992

AT 610PM MDT A LARGE THUNDERSTORM WAS LOCATED OVER WESTERN JUDITH BASIN
COUNTY AND WILL PASS THROUGH THE STANFORD AREA DURING THE NEXT HOUR.
THIS STORM WAS LIKELY PRODUCING HAIL AND HEAVY RAIN. SO FAR...NO
LARGE HAIL HAS BEEN REPORTED ANYWHERE IN NORTH CENTRAL MONTANA.

OTHER THUNDERSTORMS WERE SCATTERED ACROSS SOUTHWEST AND NORTH CENTRAL
MONTANA THIS EVENING. RADAR INDICATED HAIL WITH MOST OF THESE
THUNDERSTORMS.

MTZ004-220330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HELENA MT
627 PM MDT FRI AUG 21 1992

...THUNDERSTORMS FORMING NEAR HELENA...

AT 620 PM...A PILOT REPORTED DIME SIZE HAIL IN A THUNDERSTORM
ABOUT 8 MILES WEST OF HELENA. WEATHER RADAR SHOWED STRONG
THUNDERSTORMS DEVELOPING NEAR THE HELENA VALLEY AREA AND MOVING
EAST AT 20 TO 25 MPH. THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN...
STRONG GUSTY WINDS...HAIL AND FREQUENT LIGHTNING.

SCATTERED THUNDERSTORM WILL CONTINUE TO FORM DURING THE NEXT
TWO TO THREE HOURS OVER SOUTHWEST MONTANA.

IF YOU SEE THUNDERSTORMS APPROACHING...SEEK SHELTER AND MONITOR
THE LATEST FORECAST ON LOCAL RADIO AND T.V. STATIONS.

WILLIAMSON DC
 >

MTZ003-005-006-220230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
723 PM MDT FRI AUG 21 1992

AT 715PM MDT RADAR CONTINUED TO INDICATED SCATTERED THUNDERSTORMS ACROSS
WESTERN MONTANA. THE STRONGEST STORM WAS LOCATED IN EASTERN JUDITH BASIN
COUNTY AND WAS LIKELY PRODUCING HAIL AND HEAVY RAIN. THIS THUNDERSTORM
WILL PASS THROUGH OR JUST NORTH OF LEWISTOWN DURING THE NEXT HOUR.

OTHER THUNDERSTORMS WERE LOCATED 25 TO 50 MILES SOUTH OF GREAT FALLS
WITH ANOTHER CLUSTER DEVELOPING OVER THE MOUNTAINS 50 MILES TO THE WEST
SOUTHWEST OF GREAT FALLS. ALL STORMS WERE MOVING THE NORTHEAST ABOUT 30
MPH AND WERE LIKELY PRODUCING SMALL HAIL. THUNDERSTORMS SHOULD
MOVE INTO THE GREAT FALLS AREA ABOUT 9PM MDT THIS EVENING.

A STRONG CANADIAN COLD FRONT HAD JUST PASSED THRU THE HAVRE AND GREAT
FALLS AREAS WITH NORTH WINDS TO 30 TO 40 MPH AND FALLING TEMPERATURES.
THE 7PM TEMPERATURE AT CUT BANK WAS 41 DEGREES AND THE TEMPERATURE HAD
FALLEN INTO THE MID 50S AT GREAT FALLS.

MTZ004-220345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HELENA MT
745 PM MDT FRI AUG 21 1992

...STRONG THUNDERSTORMS MOVING INTO WESTERN MEAGHER COUNTY...

AT 740 PM WEATHER RADAR SHOWED A STRONG THUNDERSTORM NEAR
FORT LOGAN IN MEAGHER COUNTY. THIS THUNDERSTORM WAS MOVING TO
THE EAST AT 25 TO 30 MPH AND MAY PRODUCE STRONG GUSTY WINDS...
HAIL...HEAVY RAIN AND FREQUENT LIGHTNING.

SCATTERED THUNDERSTORMS CONTINUE TO FORM OVER MUCH OF SOUTHWEST
MONTANA AND WILL CONTINUE SO FOR THE NEXT COUPLE OF HOURS.

IF YOU SEE THUNDERSTORMS APPROACHING...SEEK SHELTER INDOORS
UNTIL THE STORM PASSES AND LISTEN TO THE LATEST FORECAST
ON LOCAL RADIO OR T.V. STATIONS.

WILLIAMSON DC

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