Alert archive / Montana / Flash Flood Warnings in 2002

Flash Flood Warning 6, NWS Billings, MT

August 29, 2002Treasure County, Montana

NWS Billings, MT issued this flash flood warning at Aug 29, 2002, 7:00 PM MDT for Treasure 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: Aug 29, 2002, 7:00 PM MDT (01:00 UTC)
Expired: Aug 29, 2002, 10:00 PM MDT
In force: 3 hr
Issued by: NWS Billings, MT
Area: Whole counties

County Treasure County, MT

The radar

The Billings radar (KBLX), 110 km from the middle of the area, began a volume at 00:59 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, 1.0 hours before the alert went out and 229 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: 639 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 2487 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KBYZ 300100
FFWBYZ
MTC103-300400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
658 PM MDT THU AUG 29 2002

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL TREASURE COUNTY IN SOUTHEAST MONTANA

* UNTIL 1000 PM MDT

* AT 658 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY    
  HEAVY RAIN OVER THE WARNED AREA. RADAR INDICATED RAINFALL ESTIMATES
  OF 3 TO 4 INCHES.

* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNED AREA...
  RESULTING IN EXCESSIVE RAINFALL.

ABSOLUTELY DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER
COVERS THE ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.

$$

LAT...LON 4626 10712 4597 10703 4597 10737 4636 10755

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 Aug 29, 2:13 PM MDT, 4 hours 47 minutes earlier.

Area forecast discussion, Aug 29, 2:13 PM MDT, 4 hours 47 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
213 PM MDT THU AUG 29 2002

.SHORT TERM...VALID FOR FRI AND SAT...
FORECAST PROBLEM WILL BE TIMING AND EXTENT OF CONVECTION OVER THE NEXT
COUPLE OF DAYS. AVN AND ETA HANDLING OVERALL PATTERN WELL EXCEPT FOR
TIMING AND STRENGTH OF WAVES.

TONIGHT AND FRIDAY...UPPER TROUGH SWINGS ACROSS MONTANA TONIGHT
RESULTING IN CHANCE OF SHOWERS AND THUNDERSTORMS SPREADING FROM WEST
TO EAST ACROSS THE CWA. A FEW ISOLATED SEVERE STORMS POSSIBLE THIS
EVENING GIVEN MODEST CAPE...INVERTED V SIGNATURE ON MODEL SOUNDINGS AND
LOW WET BULB ZERO HEIGHTS. HOWEVER...SHEAR APPEARS TOO WEAK FOR ANY
WIDESPREAD ACTIVITY AND WILL NOT MENTION SEVERE IN FORECAST. PRECIP WILL
LINGER THROUGH MIDDAY IN EAST AS TROUGH AXIS SWINGS OUT OF THE STATE.
TEMPS SHOULD WARM FRIDAY WITH WESTERLY FLOW...BUT SHOULD STILL BE A
FEW DEGREES COOLER THAN TODAY IN WAKE OF TROUGH. NEXT WAVE APPROACHES
WESTERN CWA BY LATE AFTERNOON AHEAD OF NEXT TROUGH AND WILL INTRODUCE
SLIGHT CHANCE IN WEST FOR LATE TOMORROW AFTERNOON.

SATURDAY NIGHT AND SUNDAY...AFOREMENTIONED WAVE WILL BRING SLIGHT CHANCE
OF ACTIVITY TO WESTERN ZONES...AND WILL LEAVE REST OF CWA DRY. SATURDAY
NEXT UPPER TROUGH SWINGS THROUGH MONTANA BRINGING A CHANCE OF PRECIP
TO THE WEST IN THE AFTERNOON AND SPREADING EAST OVERNIGHT. TEMPS
SATURDAY SHOULD BE COOLER THAN FRIDAY WITH INCREASING CLOUD COVER AND
DECREASING MID LEVEL TEMPS DUE TO UPPER TROUGH.

.LONG TERM...VALID FOR SUN...MON...TUE...WED...THU...
WEAKENING UPPER TROUGH TO SLIDE THROUGH EASTERN MONTANA SUNDAY. THIS
WILL SET UP DOWNSLOPE FLOW FOR THE FORECAST AREA. LOWER TO MID LEVELS
DRY OUT AS THE TROUGH SWINGS THROUGH WITH A COLD FRONT MOVING ACROSS.
WILL OPT TO LEAVE POPS OUT AS ATMOSPHERE PROGGED TO BE PRETTY DRY.
ATMOSPHERE STABILIZES BEHIND THE FRONT AS WELL.

MODELS IN PRETTY GOOD AGREEMENT IN THE MONDAY THROUGH THURSDAY TIME
FRAME. DRY NORTHWEST FLOW MONDAY GIVES WAY TO SOUTHWEST FLOW TUESDAY
THROUGH THURSDAY. SHOULD SEE WARMER TEMPERATURES TUESDAY AND WEDNESDAY
WITH DOWNSLOPE AHEAD OF COLD FRONT PROGGED FOR WEDNESDAY AFTERNOON AND
NIGHT. WILL INTRODUCE A CHANCE OF THUNDERSTORMS WEDNESDAY AFTERNOON AND
NIGHT. WILL LEAVE THURSDAY DRY...EVEN THOUGH SOUTHWEST FLOW PERSISTS.
WAVES APPEAR FARTHER NORTH THURSDAY AND THE FRONTAL BOUNDARY WILL BE
WELL SOUTH FOR LITTLE TO NONE SURFACE CONVERGENCE. GOING TEMPERATURES
LOOK GOOD AND WILL LET RIDE. HUMPHREY

    FRI     SAT     SUN     MON     TUE     WED     THU
-----------------------------------------------------------
BIL 058/084 056/080 054/081 053/073 054/077 054/078 056/077
    40/B    03/T    30/B    00/B    00/B    03/T    30/B
LVM 046/078 046/075 046/078 047/072 045/074 046/074 048/073
    42/T    23/T    20/B    00/B    00/B    03/T    30/B
HDN 058/086 054/081 053/083 049/075 055/079 055/080 058/079
    40/B    03/T    30/B    00/B    00/B    03/T    30/B
MLS 062/088 061/082 057/083 054/074 056/080 056/081 059/080
    42/T    02/T    30/B    00/B    00/B    03/T    30/B
4BQ 060/088 059/083 055/084 053/073 054/081 055/081 058/080
    42/T    02/T    30/B    00/B    00/B    03/T    30/B
BHK 060/087 060/081 055/082 051/070 055/078 055/080 058/079
    42/T    00/B    30/B    00/B    00/B    03/T    30/B
SHR 053/085 054/084 051/082 051/070 051/081 052/082 056/081
    40/B    03/T    30/B    00/B    00/B    03/T    30/B

.BYZ...
MT...NONE.
WY...NONE.

Nearby

Flash Flood Warnings in Montana, 2002 Every flash flood warning in 2002

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.