Alert archive / Montana / Flash Flood Warnings in 2011
Flash Flood Warning 21, NWS Glasgow, MT
NWS Glasgow, MT issued this flash flood warning at Jul 2, 2011, 8:30 PM MDT for Richland 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 as issued.
The facts
- Issued
- Jul 2, 2011, 8:30 PM MDT (02:30 UTC)
- Expired
- Jul 2, 2011, 11:18 PM MDT
- In force
- 3 hr
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
- Flood severity
- None
County Richland County, MT
The radar
The Glasgow radar (KGGW), 193 km from the middle of the area, began a volume at 02:33 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, 2.5 hours before the alert went out and 192 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
- 204 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 2352 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
029 WGUS55 KGGW 030230 FFWGGW MTC083-030530- /O.NEW.KGGW.FF.W.0021.110703T0230Z-110703T0530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GLASGOW MT 830 PM MDT SAT JUL 2 2011 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN RICHLAND COUNTY IN NORTHEAST MONTANA... * UNTIL 1130 PM MDT. * AT 824 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE... SAVAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...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. && LAT...LON 4747 10422 4735 10421 4736 10446 4748 10446 $$ SCT WEATHER.GOV/GLASGOW
2 follow-up statements
856 WGUS75 KGGW 030347 FFSGGW FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 947 PM MDT SAT JUL 2 2011 MTC083-030530- /O.CON.KGGW.FF.W.0021.000000T0000Z-110703T0530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RICHLAND- 947 PM MDT SAT JUL 2 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM MDT FOR SOUTHERN RICHLAND COUNTY... AT 941 PM MDT...A THUNDERSTORM PRODUCING VERY HEAVY RAIN WAS REPORTED OVER THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE... SAVAGE. LAT...LON 4747 10422 4735 10421 4736 10446 4748 10446 $$ SCT WEATHER.GOV/GLASGOW
614 WGUS75 KGGW 030518 FFSGGW FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 1118 PM MDT SAT JUL 2 2011 MTC083-030528- /O.CAN.KGGW.FF.W.0021.000000T0000Z-110703T0530Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RICHLAND- 1118 PM MDT SAT JUL 2 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN RICHLAND COUNTY... LAT...LON 4747 10422 4735 10421 4736 10446 4748 10446 $$ SCT WEATHER.GOV/GLASGOW
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:21 PM MDT | Special Weather Statement | GGW | Valley | 54 min |
| Jul 2, 6:45 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 60 min |
| Jul 2, 7:35 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Wibaux | 55 min |
| Jul 2, 7:40 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 45 min |
| Jul 2, 8:19 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 56 min |
| Jul 2, 8:49 PM MDT | Flash Flood Warning | GGW | Dawson | 3 hr |
Nearby
Flash Flood Warnings in Montana, 2011Every flash flood warning in 2011
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.