Alert archive / Montana / Flash Flood Warnings in 2011
Flash Flood Warning 13, NWS Glasgow, MT
NWS Glasgow, MT issued this flash flood warning at Jun 11, 2011, 5:57 PM MDT for Valley County, Montana. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 11, 2011, 5:57 PM MDT (23:57 UTC)
- Expired
- Jun 11, 2011, 8:46 PM MDT
- In force
- 3 hr
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
- Flood severity
- None
County Valley County, MT
The radar
The Glasgow radar (KGGW), 35 km from the middle of the area, began a volume at 23:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 11, 6:00 PM MDT | HEAVY RAIN 3 | 14 Nne Nashua, MT | TWO TO THREE INCHES OF RAIN FELL BETWEEN 12 MILES NORTH AND 17 MILES NORTH OF NASHUA ALONG HIGHWAY 438. WATER IS COVERING THE FIELDS. |
| Jun 11, 7:00 PM MDT | FLASH FLOOD | 11 Nne Nashua, MT | SARGENT CREEK...11 MILES NORTH OF NASHUA IS RUNNING OUT OF ITS BANKS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 12.0 hours before the alert went out and 32 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 803 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
822 WGUS55 KGGW 112357 FFWGGW MTC105-120300- /O.NEW.KGGW.FF.W.0013.110611T2357Z-110612T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GLASGOW MT 557 PM MDT SAT JUN 11 2011 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN VALLEY COUNTY IN NORTHEAST MONTANA... * UNTIL 900 PM MDT. * AT 551 PM MDT...THE PUBLIC REPORTED FLASH FLOODING FROM A THUNDERSTORM NORTH OF NASHUA ALONG HIGHWAY 438. TWO INCHES OF RAIN FELL IN 30 MINUTES AND WATER IS RAPIDLY RUNNING OFF FIELDS. * THE STORM PRODUCING FLASH FLOODING WILL REMAIN OVER RURAL AREAS OF VALLEY COUNTY. 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. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GLASGOW. && LAT...LON 4845 10637 4855 10592 4806 10598 4812 10632 $$ SCHNETZLER WEATHER.GOV/GLASGOW
2 follow-up statements
900 WGUS75 KGGW 120129 FFSGGW FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 729 PM MDT SAT JUN 11 2011 MTC105-120300- /O.CON.KGGW.FF.W.0013.000000T0000Z-110612T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ VALLEY- 729 PM MDT SAT JUN 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR EASTERN VALLEY COUNTY... AT 725 PM MDT...THE PUBLIC REPORTED THAT SARGENT CREEK WAS FLOWING OUT OF ITS BANK FROM RECENT HEAVY RAINFALL NORTH OF NASHUA. WATER LEVELS WILL REMAIN HIGH AS RUNOFF CONTINUES OVER THIS AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 4845 10637 4855 10592 4806 10598 4812 10632 $$ SCHNETZLER WEATHER.GOV/GLASGOW
628 WGUS75 KGGW 120246 FFSGGW FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 846 PM MDT SAT JUN 11 2011 MTC105-120254- /O.CAN.KGGW.FF.W.0013.000000T0000Z-110612T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ VALLEY- 846 PM MDT SAT JUN 11 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN VALLEY COUNTY... THE THREAT OF FLASH FLOODING ACROSS THE AREA HAS DIMINISHED HOWEVER FLOODING OF SOME LOW LYING AREAS REMAIN POSSIBLE. LAT...LON 4845 10637 4855 10592 4806 10598 4812 10632 $$ SCHNETZLER WEATHER.GOV/GLASGOW
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 10:57 AM MDT | Areal Flood Warning | GGW | McCone, Richland, Roosevelt, Valley | 67 hr |
| Jun 11, 12:48 PM MDT | Special Weather Statement | GGW | 42 min | |
| Jun 11, 12:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 55 min |
| Jun 11, 1:34 PM MDT | Special Weather Statement | GGW | Phillips | 41 min |
| Jun 11, 1:49 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 41 min |
| Jun 11, 2:17 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 43 min |
| Jun 11, 2:25 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 38 min |
| Jun 11, 2:56 PM MDT | Special Weather Statement | GGW | Petroleum | 49 min |
| Jun 11, 3:10 PM MDT | Special Weather Statement | GGW | Valley | 65 min |
| Jun 11, 3:29 PM MDT | Special Weather Statement | GGW | 31 min | |
| Jun 11, 3:34 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 56 min |
| Jun 11, 4:10 PM MDT | Flash Flood Watch | GGW | Phillips, Valley | 5 hr |
| Jun 11, 4:11 PM MDT | Flash Flood Warning | GGW | Valley | 86 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.