Alert archive / Montana / Flash Flood Warnings in 2002
Flash Flood Warning 4, NWS Glasgow, MT
NWS Glasgow, MT issued this flash flood warning at Jun 23, 2002, 8:59 AM MDT for Garfield County, Montana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2002, 8:59 AM MDT (14:59 UTC)
- Expired
- Jun 23, 2002, 11:00 AM MDT
- In force
- 2 hr
- Issued by
- NWS Glasgow, MT
- Area
- Counties, with a storm outline in the text
County Garfield County, MT
The radar
The Glasgow radar (KGGW), 98 km from the middle of the area, began a volume at 15:01 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 3.0 hours before the alert went out and 100 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
- 71 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- -4 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 231459 CCA FFWGGW MTC033-231700- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTED NAME OF CREEK NATIONAL WEATHER SERVICE GLASGOW MT 849 AM MDT SUN JUN 23 2002 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * FLASH FLOOD WARNING FOR A DAM FAILURE IN... EAST CENTRAL GARFIELD COUNTY IN NORTHEAST MONTANA * UNTIL 1100 AM MDT * AT 730 AM MDT...TAYLOR DAM ON TAYLOR CREEK FAILED. * OTHER LOCATIONS AFFECTED INCLUDE VAN NORMAN THE TAYLOR DAM ON TAYLOR CREEK UPSTREAM FROM VAN NORMAN SCHOOL HAS GIVEN WAY AND HIGH WATERS CAN BE EXPECTED DOWN STREAM INTO THE LITTLE DRY CREEK. AREAS DOWNSTREAM FROM THE DAM ALONG TAYLOR CREEK AND LITTLE DRY CREEK SHOULD BE PREPARED FOR FLOODING. TAKE NECESSARY PRECAUTIONS IMMEDIATELY. LAT...LON 4751 10658 4709 10659 4708 10617 4730 10625 4736 10633 4749 10632 .END 77
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 Jun 23, 2:38 AM MDT, 6 hours 21 minutes earlier.
Area forecast discussion, Jun 23, 2:38 AM MDT, 6 hours 21 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
2 AM MDT SUN JUN 23 2002
.SHORT TERM...THUNDERSTORM ACTIVITY ON A WEAKENING TREND. IMPRESSIVE
CIRCULATION EVIDENT ON KGGW RADAR LOOP. DRY SLOT WORKING NORTH INTO
OUR SE ZONES...BUT EXPECT MOISTURE WRAPPING AROUND UPPER LOW TO FILL
IN MOST OF THIS AREA THIS MORNING. ALL MODELS CONSISTENT BRINGING
MOIST...SLOWING MOVING...UPPER LOW PRESSURE SYSTEM NE ACROSS OUR
AREA TODAY. AIRMASS ALREADY VERY MOIST...WONT TAKE MUCH TO GENERATE
LOTS OF SHOWERS. MODELS VERY MOIST...BUT SLOWLY BECOMING LESS
UNSTABLE. DONT PLAN TO MENTION SEVERE TODAY...BUT KEEPING HIGH
POPS. LAST OF THIS SYSTEM MOVES OUT OF THE AREA MONDAY
MORNING...MARKING BEGINNINGS OF A PATTERN CHANGE. SIMONSEN
.LONG TERM...HOT. MODELS ALL BUILD A LARGE AND STRONG 500 MB HIGH
OVER WESTERN STATES WITH HEIGHTS S. LOOKS LIKE A PATTERN MORE
TYPICAL OF LATE JULY/EARLY AUGUST. MODELS HAVE ALL HAVE COME
AROUND TO BEING VERY CONSISTENT AND PERSISTENT WITH THIS. APPEARS
TOO STRONG FOR MUCH CONVECTION...ESPECIALLY THIS FAR FROM MOUNTAINS
AND PLAN TO UP TEMPERATURES TO 90S. SIMONSEN
KGGW TBU /075 054/083 056/087 8275111
UUUU 058/091 060/093 062/090 062/090 056/ 82000000000
KGDV TBU /076 055/081 055/085 8276111
UUUU 057/089 059/092 062/095 062/095 056/ 82000000000
.GGW...NONEIn the hours before
Special weather statement, Jun 23, 6:00 AM MDT, 2 hours 59 minutes before
MTZ016>027-059>062-241200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 600 AM MDT SUN JUN 23 2002 ...SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE AREA THIS AFTERNOON AND TONIGHT... A STRONG UPPER LEVEL DISTURBANCE WILL PRODUCE MORE SHOWERS AND THUNDERSTORMS ACROSS NORTHEAST MONTANA TODAY AND TONIGHT. THE ATMOSPHERE CONTINUES VERY UNSTABLE WITH AMPLE MOISTURE IN PLACE...SETTING THE STAGE FOR POSSIBLE SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE PRIMARY THREAT FROM THESE THUNDERSTORMS WILL BE LARGE HAIL AND DAMAGING WINDS. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. FELTGEN
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 6:24 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 66 min |
| Jun 22, 8:35 PM MDT | Flash Flood Warning | GGW | Garfield | 3 hr |
| Jun 23, 8:54 AM MDT | Flash Flood Warning | GGW | Garfield | 2 hr |
| Jun 23, 10:57 AM MDT | Flash Flood Warning | GGW | Garfield | 4 hr |
| Jun 23, 3:06 PM MDT | Flash Flood Warning | GGW | Garfield | 3 hr |
Nearby
Flash Flood Warnings in Montana, 2002Every 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.