Flash Flood Warning 2, NWS Great Falls, MT

MTZ004-

SPECIAL WEATHER STATEMENT--CORRECTION
NATIONAL WEATHER SERVICE HELENA MT
300 PM MDT SUN AUG 19 1990

...ANOTHER DAY OF THUNDERSTORMS ACROSS SOUTHWEST MONTANA...

AT 2:30 PM MDT THIS SUNDAY AFTERNOON THE WEATHER RADARS IN
MISSOULA AND GREAT FALLS INDICATED THUNDERSTORMS DEVELOPING
OVER THE SOUTHERN PORTION OF SOUTHWEST MONTANA AND MOVING TO
THE NORTHEAST. IT IS LIKELY THAT SOME OF THESE STORMS WILL
PRODUCE FREQUENT LIGHTNING...BRIEF HEAVY RAIN...SMALL HAIL...
AND STRONG GUSTY WINDS. THESE STORMS WILL CONTINUE MOVING
ACROSS SOUTHWEST MONTANA THROUGHOUT THE EVENING. PERSONS IN
SOUTHWEST MONTANA SHOULD REMAIN ALERT TO LOCAL WEATHER
CONDITIONS AND EXERCISE CAUTION WHEN IN THE VICINITY OF A
THUNDERSTORM.

LOSS

MTZ004-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HELENA MT
355 PM MDT SUN AUG 19 1990

...STRONG THUNDERSTORMS MOVING THROUGH SOUTHWEST MONTANA...

AT 3:45 PM MDT THIS SUNDAY AFTERNOON THE WEATHER RADARS IN MISSOULA
AND GREAT FALLS INDICATED TWO STRONG THUNDERSTORMS MOVING THROUGH
JEFFERSON COUNTY IN SOUTHWEST MONTANA. THIS INFORMATION WAS VERIFIED
WITH A FLIGHT SERVICE STATION WEATHER OBSERVER AT THE BUTTE AIRPORT.
LIGHTNING CHARTS ARE INDICATING FREQUENT LIGHTNING WITH THE STORMS...
AND THERE IS ALSO THE POSSIBILITY OF HEAVY RAIN...SMALL HAIL AND STRONG
GUSTY WINDS. THESE THUNDERSTORMS ARE MOVING TO THE NORTHEAST AT
APPROXIMATELY 25 MPH. THUNDERSTORMS ARE EXPECTED TO CONTINUE DEVELOPING
AND MOVING ACROSS SOUTHWEST MONTANA THROUGH THE EVENING. PERSONS IN THE
VICINITY OF A THUNDERSTORM ARE ADVISED TO EXERCISE CAUTION.
LOSS

MTZ004-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HELENA MT
515 PM MDT SAT AUG 18 1990

...BAND OF STRONG THUNDERSTORMS IS MOVING THROUGH SOUTHWEST MONTANA
THIS SUNDAY EVENING...

AT 5:15 PM MDT...NATIONAL WEATHER SERVICE RADAR WAS DEPECTING A
LARGE BAND OF STRONG THUNDERSTORMS.  THIS BAND OF THUNDERSTORMS
EXTENDED FROM NEAR ANACONDA IN DEER LODGE COUNTY EAST TO THE
MISSOURI RIVER IN BROADWATER COUNTY NORTH OF BOZEMAN AND NORTH
TO NEAR HELENA IN LEWIS AND CLARK COUNTY...ALL IN SOUTHWEST MONTANA.

THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 30 MILES AN HOUR.

THE THUNDERSTORMS ARE PRODUCING FREQUENT AND VERY DANGEROUS LIGHTNING
STRIKES TO GROUND OBJECTS AS INDICATED BY LIGHTNING DETECTORS.
THE THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE CITY OF HELENA MONTANA
BY 6:00 PM MDT AND WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAINSHOWERS
...AND FREQUENT LIGHTNING STRIKES.  HAIL MAY ALSO FALL WITH THESE
THUNDERSTORMS.

PERSONS ACROSS SOUTHWEST MONTANA...ESPECIALLY THOSE OUTDOORS AND ON
THE AREA LAKES AND RIVERS SHOULD IMMEDIATELY TAKE ACTION TO SEEK
SHELTER.  GUSTY WINDS AND LIGHTNING STRIKES WILL POSE A SPECIAL
HAZARD TO BOATERS.

THE THUNDERSTORMS ARE EXPECTED TO C?ONTINUE ACROSS SOUTHWEST MONTANA
PAST SUNDOWN.

MHOON

MTZ003-005-006-200200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
535 PM MDT SUN AUG 19 1990

AT 530 PM THIS EVENING...RADAR AND SATELLITE PICTURES INDICATED
SEVERAL THUNDERSTORMS DEVELOPING OVER CENTRAL MONTANA BETWEEN CUTBANK
...GREAT FALLS AND LEWISTOWN. THESE STORMS ARE MOVING MAINLY TO THE
NORTH AT ABOUT 25 MPH.

OTHER STORMS WERE LOCATED OVER SOUTHEAST MONTANA AND WEST FROM BOZEMAN
THROUGH HELENA AND ON TO MISSOULA.

THERE IS A POTENTIAL FOR LOCALLY HEAVY RAIN...HAIL AND STRONG GUSTY
WINDS ALONG WITH CONSIDERABLE AND DANGEROUS LIGHTNING...IN THE VICINITY
OF ANY OF THESE STORMS.

PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR POSSIBLE MINOR
FLOODING...DAZMAGING WINDS AND DEADLY LIGHTNING...AND BE PREPARED TO
SEEK PROPER SHELTER AS THE STORMS WILL CONTINUE THROUGH THE EVENING
HOURS.
END..

MTZ004-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HELENA MT
651 PM MDT SUN AUG 19 1990

...THUNDERSTORMS CONTINUE TO PUSH NORTHEAST ACROSS SOUTHWEST
MONTANA...

AT 6:45 PM MDT...NATIONAL WEATHER RADAR INDICATED THAT THUNDERSTORMS
WERE CONTINUING TO PUSH NORTHEAST AT 30 MILES AN HOUR ACROSS ALL OF
SOUTHWEST MONTANA.

THESE THUNDERSTORMS WERE PRODUCING BRIEF HEAVY RAINSHOWERS.  THE MOST
DANGEROUS PART OF THE THUNDERSTORMS IS THE LIGHTNING STRIKES.
LIGHTNING STRIKES HAVE BEEN FREQUENT AND NUMEROUS TO GROUND OBJECTS
ACROSS SOUTHWEST MONTANA.  NUMEROUS POWER OUTAGES HAVE OCCURRED
AT TIMES ACROSS THE HELENA VALLEY OF LEWIS AND CLARK
COUNTY..SURROUNDING THE CITY OF HELENA MONTANA.

THUNDERSTORMS ARE EXPECTED FROM THE CONTINENTAL DIVIDE EAST TO THE
MISSOURI RIVER ACROSS THE SOUTHWEST MONTANA AREA THROUGH 8:00 PM
MDT THIS SUNDAY EVENING.
PERSONS OUTDOORS SHOULD SEEK INDOOR SHELTER FOR SAFETY FROM THE
VERY DEADLY AND FREQUEN_T DANGEROUS LIGHTNING STRIKES TO GROUND
OBJECTS.  SOME HEAVY RAINSHOWERS WILL OCCUR WITH THESE THUNDERSTORMS
IN SOUTHWEST MONTANA AND NORMAL ROADWAYS THAT EXPERIENCE FLOODING
SHOULD BE DRIVEN OVER WITH CAUTION.

MHOON

MTZ003-006-200300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
730 PM MDT SUN AUG 19 1990

AT 730 PM THIS EVENING...RADAR AND SATELLITE PICTURES CONTINUED TO SHOW
STRONG THUNDERSTORMS OVER JUDITH BASIN AND ON A LINE FROM BILLINGS TO
HELENA. THESE STORMS WERE MOVING NORTHWEST ABOUT 30 MPH AND LIKELY
CONTAIN AREAS OF HEAVY RAIN...POSSIBLE HAIL AND FREQUENT LIGHTNING.

THUNDERSTORMS OVER NORTHWEST MEAGHER COUNTY WERE BEGINNING TO ENTER
EXTREME SOUTHWEST CASCADE COUNTY AT 730 PM. LOCAL FLOODING MAY BE
EXPECTED FROM SOME OF THESE STORMS...AND FLASH FLOODING IS POSSIBLE
ALONG SOME OF THE MOUNTAIN DRAINAGES AROUND THE BIG BELT MOUNTAINS.

PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR POSSIBLE MINOR
FLOODING...AND DEADLY LIGHTNING...AND BE PREPARED TO SEEK PROPER
SHELTER OR MOVE TO HIGHER GROUND. THE STORMS WILL CONTINUE THROUGH THE
AREA MOST OF THE EVENING.
END.