Alert archive / Montana / Flash Flood Warnings in 1990
Flash Flood Warning 3, NWS Billings, MT
NWS Billings, MT issued this flash flood warning at Aug 19, 1990, 10:54 PM MDT for Musselshell County, Yellowstone County, Montana. It was in force for 111 min.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1990, 10:54 PM MDT (04:54 UTC)
- Expired
- Aug 20, 1990, 12:45 AM MDT
- In force
- 111 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
Counties Musselshell County, MT, Yellowstone 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, 4.9 hours before the alert went out and 221 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Aug 19, 5:17 PM MDT, 5 hours 37 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
Special weather statement, Aug 19, 9:23 PM MDT, 1 hour 31 minutes before
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</html>The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:50 PM MDT | Flash Flood Warning | BYZ | Golden Valley, Musselshell, Wheatland | 115 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.