Alert archive / Montana / Flash Flood Warnings in 2001
Flash Flood Warning 1, NWS Glasgow, MT
NWS Glasgow, MT issued this flash flood warning at Jul 12, 2001, 4:35 PM MDT for Garfield 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 12, 2001, 4:35 PM MDT (22:35 UTC)
- Expired
- Jul 12, 2001, 7:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Garfield County, MT
The radar
The Billings radar (KBLX), 151 km from the middle of the area, began a volume at 22:39 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 12:00Z, 10.6 hours before the alert went out and 169 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
- 32 J/kg
- Mixed-layer CIN
- -371 J/kg
- Mixed-layer LCL
- 1152 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KGGW 122236 FFWGGW MTC033-130130- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GLASGOW MT 435 PM MDT THU JUL 12 2001 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * FLASH FLOOD WARNING FOR... GARFIELD COUNTY IN NORTHEAST MONTANA * UNTIL 730 PM MDT * AT 426 PM MDT...WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL 8 MILES NORTH OF EDWARDS... OR ABOUT 23 MILES WEST OF JORDAN...MOVING SOUTH AT 5 MPH. * SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...EDWARDS AND SAND SPRINGS EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND COULEES...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 4731 10727 4726 10752 4586 10709 4599 10647 .END 91
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 Glasgow, MT wrote its last area forecast discussion before this flash flood warning went out at Jul 12, 2:29 PM MDT, 2 hours 6 minutes earlier.
Area forecast discussion, Jul 12, 2:29 PM MDT, 2 hours 6 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
229 PM MDT THU JUL 12 2001
THIS AFTERNOON A DEW POINT FRONT ACROSS CENTRAL MONTANA. DEW POINTS
ACROSS THE CWFA IN THE MID TO UPPER 60S. CONVECTION FIRING OVER
WESTERN MONTANA WITH A SHORTWAVE MOVING THROUGH THE WESTERN PART OF
THE STATE THIS AFTERNOON. THIS WAVE CONTINUES TO NNE A PIECE OF THIS
WAVE WILL MOVE ACROSS THE WESTERN AREAS THIS EVENING AND TONIGHT.
THIS EVENING...SHRA/TSRA SHOULD MOVING INTO THE REGION MAINLY OVER
THE WESTERN CWFA...ALREADY HAVING AFTERNOON POPCORN CONVECTION OVER
THE SOUTHERN CWFA WITH DAYTIME HEATING. SPC SWODY1 UPDATE PUTS THE
WESTERN ZONES IN A SLGT RISK FOR SVR. TIME HEIGHT SOUNDINGS SHOW A
BETTER SHEAR ENVIRONMENT FOR THIS EVENING ACROSS THE WEST...WET BULB
ZEROS ARE PRETTY HIGH FOR A SIGNIFICANT THREAT OF LARGE
HAIL...HOWEVER STRONG GUSTS CAN BE EXPECTED WITH LARGER STORMS...AND
MOST OF ALL VERY HEAVY RAINFALL. WILL HOLD UP ON A FLASH FLOOD WATCH
FOR THE EASTERN ZONES SINCE THE BEST CHANCE FOR TSRA REMAINS WEST
AND SOUTH.
AFTER THE CONVECTION MOVES OUT LATE THIS EVENING...DO EXPECT ANOTHER
ROUND OF LOWS ST/FG FOR THE EARLY MORNING HOURS FOR THE MISSOURI AND
MILK RIVER VALLEYS. WILL ADD AM FG TO THE ZONES. ETA TRIES TO KEEP
LOW CLOUDS IN ALL DAY ON FRIDAY...HOWEVER DO EXPECT WITH THIS TIME
OF YEAR THE CLOUDS WILL LIFT OUT WITH THE HEATING OF THE DAY.
LOOKING FOR MORE OF THE SAME WITH PM TSRA AGAIN. SAME PATTERN FOR
SATURDAY CONTINUES.
FOR TEMPS...GOING TO STAY WITH THE STATUS QUO...MODELS ARE TRYING TO
COOL DOWN THE TEMPS SOME ON SATURDAY...HOWEVER NOT BUYING INTO THAT
YET...WILL KEEP THEM UP. PROTON
EXTENDED...MODELS SUGGEST AN OMEGA BLOCK DEVELOPING OVER NORTH
AMERICA DURING THE EXTENDED PERIOD. THE UPPER LEVEL RIDGE IS
FORECAST TO REMAIN EAST OF MONTANA WITH A DEEP TROUGH ALONG THE WEST
COAST AND AN UPPER LOW OVER SOUTHWEST CANADA. THIS PATTERN KEEPS
NORTHEAST MONTANA IN SOUTHWEST FLOW ALOFT FOR THE ENTIRE PERIOD.
WILL CONTINUE WITH CHANCE POPS EACH DAY WITH TEMPERATURES REMAINING
NEAR NORMAL. WATERHOUSE
KGGW 064/088 062/088 062/088 061/087 060/086 060/086 059/085
TTTTTTT 943232/9933333
KGDV 064/090 064/092 063/090 062/089 061/088 060/087 059/086
TTTTTTT 943232/9933333
.GGW...NONE.The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 4:04 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 56 min |
| Jul 12, 4:52 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 53 min |
| Jul 12, 5:18 PM MDT | Tornado Warning | GGW | Garfield | 57 min |
Nearby
Flash Flood Warnings in Montana, 2001Every 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.