Alert archive / Montana / Flash Flood Warnings in 1987
Flash Flood Warning 1, NWS Great Falls, MT
NWS Great Falls, MT issued this flash flood warning at Jul 29, 1987, 7:33 PM MDT for Chouteau County, Teton County, Montana. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 29, 1987, 7:33 PM MDT (01:33 UTC)
- Expired
- Jul 29, 1987, 10:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Chouteau County, MT, Teton County, MT
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Great Falls, MT (KGTF), launched 00:00Z, 1.6 hours before the alert went out and 42 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 195 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KGTF 300133
FFWGTF
MTC015-099-300430-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
733 PM MDT WED JUL 29 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1030 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NORTHWEST MONTANA
...WESTERN CHOUTEAU...EASTERN TETON
DISASTER AND EMERGENCY SERVICES OFFICIAL REPORTS 2 1/2 INCHES OF RAIN
RECEIVED EARLIER THIS EVENING ABOUT 7 MILES EAST OF CHOTEAU CAUSING
FLOODING OF THE TETON RIVER WITH WATER OVER THE ROAD AT COLLINS. THIS
WATER WILL BE MOVING DOWNSTREAM ON THE TETON TONIGHT AND ANY FURTHER
THUNDERSTORM ACTIVITY IN THE AREA COULD CAUSE FURTHER FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 29, 1:51 PM MDT, 5 hours 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HAVRE MT 155 PM MDT WED JUL 29 1987 ...HEAVY THUNDERSTORMS AGAIN FORECAST FOR NORTH-CENTRAL MONTANA... THUNDERSTORMS..SOME WITH HEAVY RAIN...ARE ONCE AGAIN FORECAST FOR NORTH-CENTRAL MONTANA FOR LATE THIS AFTERNOON AND EVENING. THESE STORMS ARE BEING FED BY SUB TROPICAL MOISTURE EXTENDING FROM MEXICO TO SOUTHERN ALBERTA. HEAVY RAINFALL FROM STORMS OF THE PAST FEW DAYS HAS LEFT THE SOIL IN SOME AREAS OF NORTHERN MONTANA SATURATED. ADDITIONALLY..HIGH HUMMIDITES HAS RETARDED EVAPORATION. HEAVY RAIN FALLING OVER THE SATURATED GROUND TONIGHT COULD CAUSE SOME LOCAL FLOODING IN THIS AREA. PERSONS SHOULD BE AWARE OF THE CURRENT AND EXPECTED WEATHER CONDI- TIONS AND LISTEN FOR ANY UPDATED FORECASTS AND STATEMENTS FROM THE NATIONAL WEATHER SERVICE. /CORP/
Special weather statement, Jul 29, 5:15 PM MDT, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS, MT
506 PM MDT WED JUL 29 1987
...FLASH FLOOD WATCH ISSUED FOR PORTIONS OF NORTHEAST MONTANA THIS
EVENING...
A FLASH FLOOD WATCH HAS BEEN ISSUED FOR PORTIONS OF NORTHEAST MONTANA
THIS EVENING UNTIL 9 PM MDT FOR THE FOLLOWING COUNTIES:
EASTERN GARFIELD...MCCONE...WESTERN DAWSON...WESTERN RICHLAND AND
ROOSEVELT...
INCLUDING THE TOWNS OF: BROCKWAY...CIRCLE...BLOOMFIELD...WOLFPOINT
AND POPLAR
AT 5 PM MDT RADAR INDICATED POSSIBLE HEAVY THUNDERSTORMS NEAR THE
BORDER OF GARFIELD AND MCCONE COUNTIES. ALSO OTHER THUNDERSTORMS WERE
OVER EASTERN MCCONE COUNTY. THESE STORMS WERE MOVING SLOWLY
NORTHEASTWARD AND CARRIED POTENTIA#LLY HEAVY RAIN.
PEOPLE IN THESE COUNTIES SHOULD BE PREPARED TO MOVE TO HIGHER GROUND
IF HEAVY RAIN OCCURS DUE TO THE FLASH FLOOD POTENTIAL.
HALBERTSpecial weather statement, Jul 29, 7:27 PM MDT, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HAVRE MT 730 PM MDT WED JUL 29 1987 ...FLASH FLOOD WATCH IN EFFECT FOR THE BEAR PAW MOUNTAINS... A FLASH FLOOD WATCH CONTINUES IN EFFECT UNTIL 2AM THURSDAY MORNING FOR THE BEAR PAW MOUNTAINS AND SURROUNDING AREAS. SLOW MOVING THUNDERSTORMS ARE CURRENTLY MOVING VERY SLOWLY ACROSS THE BEAR PAW MOUNTAINS IN NORTH CENTRAL MONTANA. HEAVY RAIN AND FREQUENT LIGHTNING CAN BE EXPECTED WITH THESE THUNDERSTORMS. HEAVY RAINFALL FROM STORMS OF THE PAST FEW DAYS HAS LEFT THE SOIL IN SOME AREAS OF NORTHERN MONTANA SATURATED. ADDITIONALLY..HIGH HUMMIDITES HAS RETARDED EVAPORATION. A FLASH FLOOD WATCH MEANS FLOODING IS POSSIBLE WITHIN THE WATCH AREA. PERSONS IN THE WATCH AREA ARE ADVISED TO KEEP INFORMED AND TO BE READY FOR QUICK ACTION IF FLASH FLOODING IS OBSERVED OR IF A WARNING IS ISSUED. /CHAMBERLAIN/
Nearby
Flash Flood Warnings in Montana, 1987Every flash flood warning in 1987
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.