Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 237, NWS Grand Forks, ND

August 23, 2002Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 2002, 5:30 PM CDT for Towner County, North Dakota. It was in force for 45 min. 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 23, 2002, 5:30 PM CDT (22:30 UTC)
Expired
Aug 23, 2002, 6:15 PM CDT
In force
45 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Towner County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.5 hours before the alert went out and 251 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 12:00Z on 2002-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2002-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
855 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
306 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.

475 
WUUS53 KFGF 232230
SVRFAR
NDC095-232315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
529 PM CDT FRI AUG 23 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  TOWNER COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 615 PM CDT.

* AT 524 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES WEST OF AMOURDALE...OR ABOUT 50 MILES
  WEST OF LANGDON...MOVEMENT WAS TO THE SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  AMOURDALE AT 530 PM AND
  ROCKLAKE AT 545 PM.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4898 9941 4886 9951 4860 9928 4875 9905


30
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 4:52 PM CDTSevere Thunderstorm WarningFGFTowner38 min
Aug 23, 5:07 PM CDTSevere Thunderstorm WarningFGFCavalier38 min
Aug 23, 5:42 PM CDTSevere Thunderstorm WarningFGFCavalier48 min
Aug 23, 5:44 PM CDTSevere Thunderstorm WarningFGFPembina46 min
Aug 23, 6:13 PM CDTSevere Thunderstorm WarningFGFTowner47 min
Aug 23, 6:20 PM CDTTornado WarningFGFPembina40 min
Aug 23, 6:32 PM CDTSevere Thunderstorm WarningFGFCavalier, Ramsey43 min
Aug 23, 6:43 PM CDTSevere Thunderstorm WarningFGFWalsh47 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm 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.