Alert archive / North Dakota / Flash Flood Warnings in 2001

Flash Flood Warning 23, NWS Grand Forks, ND

July 31, 2001Grand Forks County, Griggs County, Steele County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jul 31, 2001, 10:29 AM CDT for Grand Forks County, Griggs County, Steele County, North Dakota. It was in force for 3 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, 10:29 AM CDT (15:29 UTC)
Expired: Jul 31, 2001, 1:30 PM CDT
In force: 3 hr
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Grand Forks County, ND, Griggs County, ND, Steele County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 37 km from the middle of the area, began a volume at 15:32 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 3.5 hours before the alert went out and 238 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: 381 J/kg
Mixed-layer CIN: -626 J/kg
Mixed-layer LCL: 1544 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFGF 311533
FFWFGF
NDC035-039-091-311830-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1029 AM CDT TUE JUL 31 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  WESTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...
  GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA AND   STEELE COUNTY IN
  SOUTHEAST NORTH DAKOTA.

* UNTIL 130 PM CDT

* AT 1027 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED   THUNDERSTORMS WITH HEAVY RAIN CONTINUE TO MOVE
  NORTHEAST AT 35 MILES AN HOUR.

* LARIMORE...FINLEY...ORR...MCCANNA AND NIAGARA WILL BE AFFECTED
  BY  THE HEAVY RAIN. RAINFALL AMOUNTS OF UP TO TWO INCHES
  ARE POSSIBLE WITH THESE STORMS. FLOODING IS EXPECTED
  OVER ROADWAYS...STREETS AND FLOOD PRONE LOW LYING AREAS.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DOm NOT DRIVE YOUR
VEHICLE INTO WATER OF UNKNOWN DEPTH. ONE OR TWO FEET OF WATER WILL
FLOAT MOST CARS DOWNSTREAM.


$$
04

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 2:37 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	23 min
Jul 31, 3:26 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	34 min
Jul 31, 10:14 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele	46 min
Jul 31, 10:52 AM CDT	Severe Thunderstorm Warning	FGF	Traill	38 min
Jul 31, 10:59 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele	46 min
Jul 31, 4:39 PM CDT	Flash Flood Warning	FGF	Grand Forks	4 hr
Jul 31, 4:41 PM CDT	Severe Thunderstorm Warning	FGF	Cass	49 min
Jul 31, 4:54 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	51 min
Jul 31, 4:58 PM CDT	Severe Thunderstorm Warning	FGF	Traill	32 min
Jul 31, 6:13 PM CDT	Severe Thunderstorm Warning	FGF	Cass	32 min

Nearby

Flash Flood Warnings in North Dakota, 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.