Alert archive / Minnesota / Flash Flood Warnings in 2001

Flash Flood Warning 27, NWS Grand Forks, ND

July 31, 2001Pennington County, Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jul 31, 2001, 6:23 PM CDT for Pennington County, Polk County, Red Lake 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 counties it named.

The facts

Issued
Jul 31, 2001, 6:23 PM CDT (23:23 UTC)
Expired
Aug 1, 2001, 12:00 AM CDT
In force
6 hr
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Pennington County, MN, Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 95 km from the middle of the area, began a volume at 23:26 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, 11.4 hours before the alert went out and 226 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-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2001-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2851 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2001-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2851 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.8

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFGF 312326
FFWFGF
MNC113-119-125-010500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
623 PM CDT TUE JUL 31 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PENNINGTON COUNTY IN NORTHWESTERN MINNESOTA
  EASTERN POLK COUNTY IN NORTHWESTERN MINNESOTA
  RED LAKE COUNTY IN NORTHWESTERN MINNESOTA

* UNTIL 1200 AM CDT

* AT 615 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS CONTINUING TO DEVELOP AND MOVE NORTHEASTWARD OVER RED
  LAKE AND PENNINGTON COUNTIES. ADDITIONAL THUNDERSTORM DEVELOPMENT
  WAS OCCURING TO THE SOUTHWEST AND WILL PUSH INTO EASTERN POLK
  COUNTY DURING THE NEXT SEVERAL HOURS.

* RADAR INDICATES THAT THESE AREAS HAVE RECEIVED UPWARDS OF ONE TO
  TWO INCHES OF RAINFALL ALREADY. AS THESE THUNDERSTORMS CONTINUE TO
  DEVELOP AND MOVE OVER THE SAME AREAS...ONE TO TWO INCHES OF
  ADDITIONAL RAINFALL IS LIKELY WITHIN THE WARNING AREA. RAPID
  RUNOFF WILL OCCUR IN PLACES WHERE SOILS HAVE ALREADY BEEN
  SATURATED. SOME COMMUNITIES INCLUDED IN THE FLASH FLOOD WARNING
  ARE THIEF RIVER FALLS...RED LAKE FALLS...AND FOSSTON.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE. PLEASE DO NOT DRIVE YOUR VEHICLE INTO WATER
OF UNKNOWN DEPTH. ONE OR TWO FEET OF WATER WILL FLOAT MOST CARS
DOWNSTREAM.


$$
FISCHER


&
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 4:11 AM CDTSevere Thunderstorm WarningFGFNorman, Polk34 min
Jul 31, 4:11 AM CDTSevere Thunderstorm WarningFGFPennington, Red Lake34 min
Jul 31, 4:11 AM CDTSevere Thunderstorm WarningFGFMarshall34 min
Jul 31, 4:47 AM CDTSevere Thunderstorm WarningFGFPennington, Polk, Red Lake28 min
Jul 31, 4:47 AM CDTSevere Thunderstorm WarningFGFBeltrami, Kittson, Marshall, Roseau28 min
Jul 31, 4:47 AM CDTSevere Thunderstorm WarningFGFClearwater28 min
Jul 31, 5:37 AM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods38 min
Jul 31, 11:21 AM CDTSevere Thunderstorm WarningFGFPolk39 min
Jul 31, 11:57 AM CDTSevere Thunderstorm WarningFGFPennington, Polk, Red Lake48 min
Jul 31, 12:11 PM CDTSevere Thunderstorm WarningFGFMarshall64 min
Jul 31, 12:43 PM CDTSevere Thunderstorm WarningFGFPennington32 min
Jul 31, 12:46 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods59 min
Jul 31, 1:20 PM CDTSevere Thunderstorm WarningFGFPennington, Polk25 min
Jul 31, 1:35 PM CDTSevere Thunderstorm WarningFGFMarshall40 min
Jul 31, 1:44 PM CDTSevere Thunderstorm WarningFGFLake of the Woods31 min
Jul 31, 2:15 PM CDTSevere Thunderstorm WarningFGFBeltrami, Marshall30 min
Jul 31, 4:35 PM CDTFlash Flood WarningFGFMarshall6 hr
Jul 31, 4:39 PM CDTFlash Flood WarningFGFPolk4 hr
Jul 31, 4:54 PM CDTSevere Thunderstorm WarningFGFPolk51 min
Jul 31, 5:16 PM CDTSevere Thunderstorm WarningFGFLake of the Woods, Roseau44 min
Jul 31, 5:39 PM CDTTornado WarningFGFBeltrami, Lake of the Woods36 min
Jul 31, 6:05 PM CDTFlash Flood WarningFGFBeltrami, Lake of the Woods, Marshall, Roseau6 hr
Jul 31, 6:13 PM CDTSevere Thunderstorm WarningFGFClay32 min
Jul 31, 6:15 PM CDTTornado WarningFGFLake of the Woods30 min
Jul 31, 6:24 PM CDTSevere Thunderstorm WarningFGFNorman36 min
Jul 31, 6:54 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake36 min
Jul 31, 6:58 PM CDTSevere Thunderstorm WarningFGFNorman32 min

Nearby

Flash Flood Warnings in Minnesota, 2001Every flash flood warning in 2001

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.