Alert archive / North Dakota / Flash Flood Warnings in 2011
Flash Flood Warning 7, NWS Grand Forks, ND
NWS Grand Forks, ND issued this flash flood warning at Jul 19, 2011, 5:14 AM CDT for Cass County, North Dakota; Clay County, Minnesota. It was in force for 5 hr. 3 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
- Jul 19, 2011, 5:14 AM CDT (10:14 UTC)
- Expired
- Jul 19, 2011, 10:15 AM CDT
- In force
- 5 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clay County, MN, Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 84 km from the middle of the area, began a volume at 10:17 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 |
|---|---|---|---|
| Jul 19, 5:14 AM CDT | FLASH FLOOD | Fargo, ND | EXTENSIVE STREET FLOODING. 2 TO 3 INCHES OF RAINFALL IN 30 TO 60 MINTUES. |
| Jul 19, 5:15 AM CDT | FLASH FLOOD | Moorhead, MN | STREET FLOODING RENDERING ROADS IMPASSABLE. INCLUDES PHOTOGRAPHIC EVIDENCE FROM SOCIAL MEDIA. |
| Jul 19, 5:30 AM CDT | FLASH FLOOD | Fargo, ND | 2 TO 3 INCHES OF RAIN WITHIN AN HOUR CAUSING STREET FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 10.2 hours before the alert went out and 252 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
- 6467 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 882 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 318 m²/s²
- Significant tornado parameter
- 10.1
- Supercell composite
- 42.1
The text
As transmitted, in the capitals the NWS used until 2016.
342 WGUS53 KFGF 191016 FFWFGF MNC027-NDC017-191600- /O.NEW.KFGF.FF.W.0007.110719T1016Z-110719T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 514 AM CDT TUE JUL 19 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL CLAY COUNTY IN NORTHWEST MINNESOTA... EXTREME EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 1100 AM CDT * AT 514 AM CDT...THE PUBLIC REPORTED MANY STREETS IN FARGO FLOODED AND IMPASSABLE. ONE TO TWO INCHES OF RAIN OCCURRED IN A SHORT DURATION. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FARGO... MOORHEAD AND OXBOW. THE FOLLOWING STREAM IS INCLUDED IN THE WARNING...SHEYENNE RIVER. THE FOLLOWING TOWNSHIPS ARE INCLUDED IN THE WARNING...STANLEY TOWNSHIP...KURTZ TOWNSHIP...MOORHEAD TOWNSHIP...BARNES TOWNSHIP AND OAKPORT TOWNSHIP. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND DONT DROWN. AVOID DRIVING ON FLOODED ROADS. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. && LAT...LON 4690 9672 4682 9672 4682 9687 4690 9687 $$ TG
1 follow-up statement
919 WGUS73 KFGF 191515 FFSFGF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1015 AM CDT TUE JUL 19 2011 MNC027-NDC017-191530- /O.CAN.KFGF.FF.W.0007.000000T0000Z-110719T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CASS ND-CLAY MN- 1015 AM CDT TUE JUL 19 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WEST CENTRAL CLAY COUNTY IN NORTHWEST MINNESOTA...AND EXTREME EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND DONT DROWN. AVOID DRIVING ON FLOODED ROADS. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. && LAT...LON 4690 9672 4682 9672 4682 9687 4690 9687 $$ VG
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 2:25 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 65 min |
| Jul 19, 2:57 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Traill | 63 min |
| Jul 19, 3:29 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 61 min |
| Jul 19, 3:52 AM CDT | Tornado Warning | FGF | Cass | 38 min |
| Jul 19, 4:17 AM CDT | Areal Flood Advisory | FGF | Cass | 6 hr |
| Jul 19, 5:31 AM CDT | Flash Flood Warning | FGF | Cass | 5 hr |
| Jul 19, 5:45 AM CDT | Flash Flood Warning | FGF | Cass | 5 hr |
| Jul 19, 8:52 AM CDT | River Flood Warning | FGF | Cass | 6 days |
| Jul 19, 8:52 AM CDT | River Flood Warning | FGF | Cass | 6 days |
| Jul 19, 8:52 AM CDT | River Flood Warning | FGF | Cass | 50 hr |
| Jul 19, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Clay | 58 min |
| Jul 19, 5:15 AM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Otter Tail, Wilkin | 60 min |
| Jul 19, 6:00 AM CDT | Flash Flood Warning | FGF | Becker, Otter Tail | 4 hr |
| Jul 19, 6:00 AM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 60 min |
| Jul 19, 6:44 AM CDT | Flash Flood Warning | FGF | Becker, Hubbard, Otter Tail, Wadena | 4 hr |
| Jul 19, 6:50 AM CDT | Severe Thunderstorm Warning | FGF | Becker, Hubbard, Otter Tail, Wadena | 55 min |
| Jul 19, 10:00 AM CDT | River Flood Warning | FGF | Clay | 25 hr |
| Jul 19, 10:00 AM CDT | River Flood Warning | FGF | Clay | 49 hr |
| Jul 19, 2:15 PM CDT | Areal Flood Advisory | FGF | Beltrami, Clearwater | 10 hr |
Nearby
Flash Flood Warnings in North Dakota, 2011Flash Flood Warnings in Minnesota, 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.