Alert archive / Minnesota / Flash Flood Warnings in 2001

Flash Flood Warning 28, NWS Grand Forks, ND

July 31, 2001Clearwater County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jul 31, 2001, 10:05 PM CDT for Clearwater County, Minnesota. It was in force for 5 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, 10:05 PM CDT (03:05 UTC)
Expired: Aug 1, 2001, 3:00 AM CDT
In force: 5 hr
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Clearwater County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 146 km from the middle of the area, began a volume at 03:08 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 00:00Z, 3.1 hours before the alert went out and 190 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: 1223 J/kg
Mixed-layer CIN: -187 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 558 m²/s²
0-3 km storm-relative helicity: 694 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 26.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFGF 010306
FFWFGF
MNC029-010800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1005 PM CDT TUE JUL 31 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLEARWATER COUNTY IN NORTHWESTERN MINNESOTA

* UNTIL 300 AM CDT

* AT 1004 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
  THUNDERSTORMS CONTINUING TO DEVELOP AND AFFECT AREAS OF NORTHERN
  CLEARWATER COUNTY.

* RADAR ESTIMATES THAT WIDESPREAD ONE TO TWO INCHES HAVE FALLEN
  ACROSS NORTHERN CLEARWATER COUNTY...WITH LOCALIZED AMOUNTS OF
  THREE TO FOUR INCHES. ADDITIONAL RAINFALL WILL QUICKLY RUN OFF.
  SOME COMMUNITIES INCLUDED IN THE FLASH FLOOD WARNING ARE BAGLEY...
  CLEARBROOK...AND LEONARD.

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 DEPT5H. 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.

Issued	Product	Office	Counties	Lasted
Jul 31, 7:30 PM CDT	Severe Thunderstorm Warning	FGF	Polk, Red Lake	30 min
Jul 31, 7:58 PM CDT	Severe Thunderstorm Warning	FGF	Polk	32 min
Jul 31, 8:08 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater	52 min
Jul 31, 8:23 PM CDT	Severe Thunderstorm Warning	FGF	Pennington	37 min
Jul 31, 8:43 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	32 min
Jul 31, 9:00 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington	30 min
Jul 31, 11:10 PM CDT	Flash Flood Warning	FGF	Beltrami, Lake of the Woods	4 hr

Nearby

Flash Flood Warnings in Minnesota, 2001 Every 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.