Alert archive / Minnesota / Flash Flood Warnings in 2007
Flash Flood Warning 5, NWS Grand Forks, ND
NWS Grand Forks, ND issued this flash flood warning at May 18, 2007, 9:08 PM CDT for Clay County, Minnesota; Cass County, North Dakota. It was in force for 12 hr. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 18, 2007, 9:08 PM CDT (02:08 UTC)
- Expired
- May 19, 2007, 9:00 AM CDT
- In force
- 12 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Clay County, MN, Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 77 km from the middle of the area, began a volume at 02:11 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 |
|---|---|---|---|
| May 18, 9:19 PM CDT | FLASH FLOOD | Moorhead, MN | STREETS IN MOORHEARD FLOODING OVER THE CURBS. DITCHES FILLING UP. |
| May 18, 9:30 PM CDT | FLASH FLOOD | Fargo, ND | STREET FLOODING. |
| May 18, 11:45 PM CDT | FLASH FLOOD | Moorhead, MN | AIRPORT MANAGER/SHERIFF OBSERVED FLOODING OF RUNWAYS AND TAXIWAYS AT MOORHEAD AIRPORT. |
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, 2.1 hours before the alert went out and 253 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
- 859 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 2529 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KFGF 190208
FFWFGF
MNC027-NDC017-191400-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
908 PM CDT FRI MAY 18 2007
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN CLAY COUNTY IN NORTHWEST MINNESOTA...
SOUTHEASTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA...
THIS INCLUDES THE CITY OF FARGO...
* UNTIL 900 AM CDT SATURDAY
* AT 905 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED VERY HEAVY
RAIN FROM A THUNDERSTORM 4 MILES SOUTH OF GLYNDON...OR ABOUT 14
MILES EAST OF FARGO. THE STORM PRODUCING VERY HEAVY RAIN WAS
NEARLY STATIONARY. THE THUNDERSTORMS ARE CAPABLE OF PRODUCING
RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. THIS WILL CAUSE STREET
FLOODING AND RAPID RISES IN SMALL STREAMS AND RIVERS.
* SOME LOCATIONS IN THE WARNING INCLUDE FARGO...MOORHEAD...GLYNDON
AND DILWORTH.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE.
LAT...LON 4665 9686 4665 9671 4665 9619 4692 9619
4693 9692 4683 9688
$$
BRAMER1 follow-up statement
000
WGUS73 KFGF 190400
FFSFGF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1058 PM CDT FRI MAY 18 2007
MNC027-NDC017-191400-
CLAY MN-CASS ND-
1058 PM CDT FRI MAY 18 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM CDT SATURDAY
FOR SOUTHERN CLAY COUNTY IN NORTHWEST MINNESOTA...AND SOUTHEASTERN
CASS COUNTY IN SOUTHEAST NORTH DAKOTA...
AT 1040 PM CDT...CLAY COUNTY LAW ENFORCEMENT OFFICIALS REPORTED
FLOODING WAS IN PROGRESS IN THE GLYNDON...SABIN AND AREAS JUST TO
THE EAST AND SOUTH OF MOORHEAD. DOPPLER RADAR INDICATES THE AXIS OF
THE MOST SIGNIFICANT RAIN FROM JUST SOUTHEAST OF MOORHEAD TO BETWEEN
SABIN...DILWORTH AND DOWNER. RADAR ESTIMATES SHOW THAT 3 TO 6 INCHES
OF RAIN HAVE FALLEN IN THIS AREA.
STREET FLOODING WAS REPORTED IN THE CITY OF MOORHEAD EARLIER.
DOPPLER RADAR SHOWS THAT ANOTHER BATCH OF HEAVY RAIN WILL BE MOVING
ACROSS THE WARNING AREA THROUGH MIDNIGHT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR
VEHICLE INTO WATER OF UNKNOWN DEPTH. ONE OR TWO FEET OF WATER WILL
FLOAT MOST CARS DOWNSTREAM.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
FRIDAY EVENING FOR NORTHWESTERN MINNESOTA.
LAT...LON 4665 9686 4665 9671 4665 9619 4692 9619
4693 9692 4683 9688
$$
EWENSThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 8:07 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 53 min |
| May 18, 9:01 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 59 min |
| May 18, 10:17 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 58 min |
| May 18, 11:25 PM CDT | Severe Thunderstorm Warning | FGF | Norman | 65 min |
| May 18, 8:02 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey | 58 min |
| May 18, 8:11 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 64 min |
| May 18, 8:20 PM CDT | Tornado Warning | FGF | Barnes | 55 min |
| May 18, 9:16 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 43 min |
| May 18, 11:53 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 52 min |
Nearby
Flash Flood Warnings in Minnesota, 2007Flash Flood Warnings in North Dakota, 2007Every flash flood warning in 2007
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.