Alert archive / North Dakota / Flash Flood Warnings in 2002

Flash Flood Warning 51, NWS Grand Forks, ND

August 31, 2002Cavalier County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Aug 31, 2002, 7:22 PM CDT for Cavalier County, North Dakota. It was in force for 4 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 31, 2002, 7:22 PM CDT (00:22 UTC)
Expired
Aug 31, 2002, 11:00 PM CDT
In force
4 hr
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Cavalier County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.4 hours before the alert went out and 286 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, Bismarck Municip, ND at 00:00Z on 2002-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1564 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2002-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.19395878Sfc1 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
1564 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
2744 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFGF 010022
FFWFAR
NDC019-010400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
720 PM CDT SAT AUG 31 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  NORTHERN CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 1100 PM CDT.

* AT 715 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH HEAVY RAIN CONTINUE TO MOVE ACROSS THE 
  SARLES...HANNAH...WALES AND MOUNT CARMEL AREAS. DOPPLER RADAR 
  ESTIMATES SHOW THAT RAINFALLS OF ONE AND ONE HALF TO TWO INCHES IN 
  AN HOUR ARE ASSOCIATED WITH THESE STORMS.

* SARLES...CALVIN...OLGA...VANG AND MOUNT CARMEL WILL BE AFFECTED BY 
  THE HEAVY RAIN. RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE 
  THROUGH THE EVENING HOURS. WITH RECENT RAINFALLS THE GROUND IS 
  SATURATED AND FLOODING WILL OCCUR IN A VERY SHORT PERIOD OF TIME.

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 4900 9901 4878 9900 4878 9795 4900 9796

100
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 7:13 PM CDTSevere Thunderstorm WarningFGFCavalier47 min
Aug 31, 7:45 PM CDTSevere Thunderstorm WarningFGFPembina45 min
Aug 31, 7:56 PM CDTSevere Thunderstorm WarningFGFCavalier34 min
Aug 31, 8:32 PM CDTSevere Thunderstorm WarningFGFCavalier43 min
Aug 31, 8:42 PM CDTTornado WarningFGFCavalier33 min
Aug 31, 8:53 PM CDTSevere Thunderstorm WarningFGFPembina52 min
Aug 31, 9:00 PM CDTSevere Thunderstorm WarningFGFBenson, Towner45 min
Aug 31, 9:11 PM CDTSevere Thunderstorm WarningFGFCavalier49 min
Aug 31, 9:43 PM CDTSevere Thunderstorm WarningFGFBenson, Ramsey, Towner62 min
Aug 31, 9:47 PM CDTSevere Thunderstorm WarningFGFPembina43 min
Aug 31, 10:02 PM CDTSevere Thunderstorm WarningFGFCavalier43 min
Aug 31, 10:07 PM CDTFlash Flood WarningFGFCavalier, Pembina3 hr
Aug 31, 10:20 PM CDTSevere Thunderstorm WarningFGFBarnes, Griggs55 min
Aug 31, 10:30 PM CDTSevere Thunderstorm WarningFGFPembina45 min
Aug 31, 10:45 PM CDTSevere Thunderstorm WarningFGFCavalier45 min
Aug 31, 10:52 PM CDTSevere Thunderstorm WarningFGFCass53 min
Aug 31, 11:15 PM CDTSevere Thunderstorm WarningFGFBarnes30 min
Aug 31, 11:18 PM CDTSevere Thunderstorm WarningFGFPembina42 min
Sep 1, 12:28 AM CDTSevere Thunderstorm WarningFGFSargent47 min
Sep 1, 1:19 AM CDTSevere Thunderstorm WarningFGFRichland41 min

Nearby

Flash Flood Warnings in North Dakota, 2002Every 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.