Alert archive / Montana / Flash Flood Warnings in 2001

Flash Flood Warning 23, NWS Billings, MT

July 25, 2001Custer County, Rosebud County, Montana

NWS Billings, MT issued this flash flood warning at Jul 25, 2001, 1:43 AM MDT for Custer County, Rosebud County, Montana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 25, 2001, 1:43 AM MDT (07:43 UTC)
Expired: Jul 25, 2001, 4:45 AM MDT
In force: 3 hr
Issued by: NWS Billings, MT
Area: Whole counties

Counties Custer County, MT, Rosebud County, MT

The radar

The Billings radar (KBLX), 194 km from the middle of the area, began a volume at 07:45 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 7.7 hours before the alert went out and 223 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 873 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 329 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 7.7

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.

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.

NWS Billings, MT wrote its last area forecast discussion before this flash flood warning went out at Jul 24, 9:40 PM MDT, 4 hours 3 minutes earlier.

Area forecast discussion, Jul 24, 9:40 PM MDT, 4 hours 3 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
940 PM MDT TUE JUL 24 2001

.WED AND THU...
WILL BE MAKING SOME UPDATES SINCE CONVECTION IS STARTING TO BREAK OUT
BILLINGS WEST. THE CONVECTION APPEARS TO BE THE RESULT OF A WEAK UPPER
DISTURBANCE INTERACTING WITH A CONVERGENT ZONE...AS BILLINGS DEW POINT
HAS BEEN INCREASING THIS EVENING...ALONG WITH THE DEPTH OF THE EAST
WIND ACCORDING TO THE VAD PROFILE. STROBIN

.FRI...SAT...SUN...MON...TUE...
MRF LOOKS LIKE THE ODD MODEL OUT THIS RUN COMPARED TO YESTERDAY. MAIN
DIFFERENCES CONTINUE TO BE NEXT TROUGH THAT DIGS INTO PACIFIC
NORTHWEST SATURDAY. MRF IS THE MOST PROGRESSIVE WITH THIS TROUGH...
MOVING IT OVER MONTANA SUNDAY AND MONDAY. ECMWF AND UKMET BRING THE
TROUGH TO WESTERN MONTANA THEN SHEAR ENERGY OFF TO THE NORTH WITH MEAN
TROUGH REMAINING OVER WEST COAST...KEEPING US WARM AND UNSETTLED
SOUTHWEST FLOW. ECMWF/UKMET HAVE 500 MB HEIGHTS OF 588 OVER SOUTHEAST
MONTANA WITH MRF AROUND 573. WITH THIS IN MIND WILL BE GOING 5-10
DEGREES WARMER THAN MRF. ONLY DAY THAT LOOKS POSSIBLY DRY IS FRIDAY...
BUT WITH WESTERLY FLOW OVER AREA SO NO REASON TO BREAK DAY OUT. RASCH

    WED     THU     FRI     SAT     SUN     MON     TUE
-----------------------------------------------------------
BIL 057/085 058/086 062/085 063/088 059/083 062/088 060/085
    22/T    33/T    33/T    33/T    33/T    33/T    33/T
LVM 048/084 053/085 057/083 058/085 055/080 058/083 056/081
    22/T    33/T    33/T    33/T    33/T    33/T    33/T
HDN 054/087 058/089 060/087 061/090 057/085 060/090 058/087
    22/T    33/T    33/T    33/T    33/T    33/T    33/T
MLS 059/087 062/087 062/088 064/090 063/085 064/090 063/088
    22/T    33/T    33/T    33/T    33/T    33/T    33/T
4BQ 058/086 060/086 061/087 063/089 062/084 063/089 062/087
    42/T    33/T    33/T    33/T    33/T    33/T    33/T
BHK 057/086 059/086 059/086 061/088 060/083 060/088 061/086
    42/T    33/T    33/T    33/T    33/T    33/T    33/T
SHR 054/088 057/088 058/085 059/088 059/086 059/088 058/085
    22/T    33/T    33/T    33/T    33/T    33/T    33/T

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:42 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	63 min
Jul 24, 11:48 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	57 min
Jul 25, 12:43 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	62 min
Jul 25, 12:44 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	61 min
Jul 25, 1:31 AM MDT	Flash Flood Warning	BYZ	Treasure	119 min
Jul 25, 1:33 AM MDT	Severe Thunderstorm Warning	BYZ	Custer	57 min
Jul 25, 1:45 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	60 min
Jul 25, 3:28 AM MDT	Severe Thunderstorm Warning	BYZ	Fallon	47 min
Jul 25, 3:36 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	69 min

Nearby

Flash Flood Warnings in Montana, 2001 Every flash flood warning in 2001

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; radar from the NEXRAD Level II archive.