Alert archive / Montana / Flash Flood Warnings in 1991

Flash Flood Warning 21, NWS Billings, MT

June 23, 1991Custer County, Montana

NWS Billings, MT issued this flash flood warning at Jun 23, 1991, 8:26 PM MDT for Custer County, Montana. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Jun 23, 1991, 8:26 PM MDT (02:26 UTC)
Expired
Jun 23, 1991, 9:30 PM MDT
In force
64 min
Issued by
NWS Billings, MT
Area
Whole counties

County Custer County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 2.4 hours before the alert went out and 232 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.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 1991-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 683 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 1991-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
683 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1602 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS Billings, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 23, 6:20 PM MDTFlash Flood WarningBYZBig Horn, Carbon, Yellowstone25 min
Jun 23, 6:20 PM MDTTornado WarningBYZBig Horn, Carbon, Yellowstone25 min
Jun 23, 6:34 PM MDTFlash Flood WarningBYZBig Horn, Rosebud, Treasure26 min
Jun 23, 6:34 PM MDTTornado WarningBYZBig Horn, Rosebud, Treasure26 min
Jun 23, 7:03 PM MDTFlash Flood WarningBYZRosebud, Treasure, Yellowstone57 min
Jun 23, 7:03 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure, Yellowstone57 min
Jun 23, 7:19 PM MDTTornado WarningBYZRosebud26 min
Jun 23, 7:49 PM MDTFlash Flood WarningBYZRosebud26 min
Jun 23, 7:49 PM MDTTornado WarningBYZRosebud26 min
Jun 23, 8:26 PM MDTFlash Flood WarningBYZRosebud, Treasure64 min
Jun 23, 8:26 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure64 min
Jun 23, 8:26 PM MDTSevere Thunderstorm WarningBYZCuster64 min
Jun 23, 9:20 PM MDTFlash Flood WarningBYZCarter, Custer, Fallon55 min
Jun 23, 9:20 PM MDTFlash Flood WarningBYZPowder River55 min
Jun 23, 9:20 PM MDTSevere Thunderstorm WarningBYZCarter, Custer, Fallon, Powder River55 min
Jun 23, 10:25 PM MDTFlash Flood WarningBYZCuster, Powder River, Rosebud65 min
Jun 23, 10:25 PM MDTSevere Thunderstorm WarningBYZCuster, Powder River, Rosebud65 min
Jun 24, 5:09 AM MDTFlash Flood WarningBYZCuster5 hr

Nearby

Flash Flood Warnings in Montana, 1991Every flash flood warning in 1991

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.