Alert archive / Minnesota / Flash Flood Warnings in 2002

Flash Flood Warning 47, NWS Grand Forks, ND

August 28, 2002Becker County, Clay County, Mahnomen County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Aug 28, 2002, 6:57 PM CDT for Becker County, Clay County, Mahnomen County, Minnesota. It was in force for 6 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: Aug 28, 2002, 6:57 PM CDT (23:57 UTC)
Expired: Aug 29, 2002, 12:45 AM CDT
In force: 6 hr
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Becker County, MN, Clay County, MN, Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 103 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.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 12.0 hours before the alert went out and 280 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 208 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 749 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KFGF 282357
FFWFAR
MNC005-027-087-290545-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
650 PM CDT WED AUG 28 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  WESTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  CLAY COUNTY IN NORTHWEST MINNESOTA AND
  MAHNOMEN COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 1245 AM CDT.

* AT 644 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED       
  THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUE TO MOVE OVER           
  WESTERN BECKER...CLAY AND MAHNOMEN COUNTIES.

* LATEST DOPPLER RAINFALL ESTIMATES INDICATED THAT TWO TO THREE      
  INCHES OF RAIN HAVE FALLEN OVER THE CITIES OF                      
  GLYNDON...SABIN...MUSKODA AND HITTERDAL WITH THE POTENTIAL FOR     
  ADDITIONAL HEAVY RAINFALL DURING THE NEXT FEW HOURS. ANY FURTHER   
  HEAVY RAINS WILL ONLY FURTHER AGGRAVATE THE POTENTIAL FOR STREET   
  AND OVERLAND FLOODING.

  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.

LAT...LON 4680 9671 4665 9649 4724 9557 4746 9559


BERG

NNNN

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 27, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	58 min
Aug 27, 11:18 PM CDT	Flash Flood Warning	FGF	Marshall	6 hr
Aug 28, 1:15 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater	45 min
Aug 28, 1:44 PM CDT	Severe Thunderstorm Warning	FGF	Becker	46 min
Aug 28, 2:00 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater, Hubbard	45 min
Aug 28, 4:30 PM CDT	Severe Thunderstorm Warning	FGF	Wilkin	45 min
Aug 28, 4:44 PM CDT	Severe Thunderstorm Warning	FGF	Clay	46 min
Aug 28, 5:01 PM CDT	Tornado Warning	FGF	Wilkin	44 min
Aug 28, 5:09 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Mahnomen	51 min
Aug 28, 5:27 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	48 min
Aug 28, 5:29 PM CDT	Severe Thunderstorm Warning	FGF	Clay	46 min
Aug 28, 5:47 PM CDT	Tornado Warning	FGF	Wilkin	43 min
Aug 28, 6:00 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Mahnomen	60 min
Aug 28, 6:14 PM CDT	Flash Flood Warning	FGF	Wilkin	6 hr
Aug 28, 6:16 PM CDT	Flash Flood Warning	FGF	Wilkin	6 hr
Aug 28, 6:16 PM CDT	Severe Thunderstorm Warning	FGF	Clay	59 min

Nearby

Flash Flood Warnings in Minnesota, 2002 Every 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.