Alert archive / Montana / Flash Flood Warnings in 1990
Flash Flood Warning 2, NWS Billings, MT
NWS Billings, MT issued this flash flood warning at Aug 19, 1990, 8:50 PM MDT for Golden Valley County, Musselshell County, Wheatland County, Montana. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1990, 8:50 PM MDT (02:50 UTC)
- Expired
- Aug 19, 1990, 10:45 PM MDT
- In force
- 115 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
Counties Golden Valley County, MT, Musselshell County, MT, Wheatland 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 (KTFX), launched 00:00Z, 2.8 hours before the alert went out and 158 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3601 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBIL 200250
FFWBIL
MTC037-065-107-200445-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
850 PM MDT SUN AUG 19 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A URBAN AND SMALL
STREAM FLOOD WARNING EFFECTIVE UNTIL 1045 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES
IN THE STATE OF MONTANA
GOLDEN VALLEY...MUSSELSHELL...WHEATLAND...INCLUDING THE
CITY OF HARLOWTON...INCLUDING THE CITY OF ROUNDUP...INCLUDING
THE CITY OF RYEGATE
AT 830PM MDT RADAR SHOWED INTENSE THUNDERSTORMS ACROSS WHEATLAND...
GOLDEN VALLEY AND MUSSELSHELL COUNTIES OF MONTANA. THESE STORMS ARE
MOVING NORTH AT 20 MPH. THE SHERRIFF AT HARLOWTON MT. REPORTED
WATER ON HIGHWAYS AND SMALL CREEKS OUT OF BANKS. THE SHERRIFF AT
ROUNDUP MT. REPORTED HEAVY RAIN AT GOLDEN CREEK.
A FLASH FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR I;N 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 TO HIGHER GROUND.
END/FORBESWhat 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, Aug 19, 5:17 PM MDT, 3 hours 33 minutes before
MTZ005-006-007-008-009-WYZ001-002-003-004-005-006-200030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BILLINGS MT 505 PM MDT SUN AUG 19 1990 AT 4 30 PM RADAR SHOWED INTENSE THUNDERSTORMS IN SWEET GRASS AND STILLWARER COUNTIES OF SOUTHCENTRAL MONTANA. HEAVY RAIN AND MARBLE SIZED HAIL WERE REPORTED IN THE CITY OF ABSAROKEE. THESE STORMS ARE MOVING NORTH AT 20 MPH. THUNDERSTORM ACTIVITY IS EXPECTED TO CONTINUE IN SOUTHCENTARAL MONTANA THIS EVENING. END/FORBES
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 10:54 PM MDT | Flash Flood Warning | BYZ | Musselshell, Yellowstone | 111 min |
| Aug 20, 12:53 AM MDT | Flash Flood Warning | BYZ | Golden Valley, Musselshell | 2 hr |
| Aug 20, 3:49 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 56 min |
| Aug 20, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Yellowstone | 58 min |
| Aug 20, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 58 min |
| Aug 20, 5:12 PM MDT | Tornado Warning | BYZ | Yellowstone | 33 min |
Nearby
Flash Flood Warnings in Montana, 1990Every flash flood warning in 1990
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.