Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 271, NWS Grand Forks, ND

August 26, 2002Pembina County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 2002, 7:49 PM CDT for Pembina County, North Dakota. It was in force for 41 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 26, 2002, 7:49 PM CDT (00:49 UTC)
Expired
Aug 26, 2002, 8:30 PM CDT
In force
41 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Pembina County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 141 km from the middle of the area, began a volume at 00:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 26, 2:50 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.8 hours before the alert went out and 313 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 00:00Z on 2002-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 643 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, International Fa, MN at 00:00Z on 2002-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.1939Sfc1 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
643 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1520 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

786 
WUUS53 KFGF 270049
SVRFAR
NDC067-270130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
749 PM CDT MON AUG 26 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 830 PM CDT.

* AT 747 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HENSEL...OR ABOUT 22 MILES NORTHWEST OF
  GRAFTON...MOVEMENT WAS TO THE NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  CAVALIER AT 750 PM...
  GLASSTON AT 800 PM AND
  HAMILTON AT 810 PM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MONDAY
EVENING FOR EASTERN NORTH DAKOTA.

LAT...LON 4872 9780 4859 9760 4882 9723 4908 9734


BERG

NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 7:44 PM CDTSevere Thunderstorm WarningFGFWalsh46 min
Aug 26, 8:08 PM CDTFlash Flood WarningFGFWalsh6 hr
Aug 26, 11:18 PM CDTSevere Thunderstorm WarningFGFGrand Forks42 min
Aug 27, 12:26 AM CDTSevere Thunderstorm WarningFGFBenson49 min
Aug 27, 1:33 AM CDTSevere Thunderstorm WarningFGFRamsey42 min
Aug 27, 2:07 AM CDTSevere Thunderstorm WarningFGFBenson38 min
Aug 27, 3:34 AM CDTFlash Flood WarningFGFBenson, Ramsey6 hr
Aug 27, 10:05 AM CDTSevere Thunderstorm WarningFGFCavalier55 min
Aug 27, 5:23 PM CDTSevere Thunderstorm WarningFGFCavalier, Pembina37 min
Aug 27, 5:58 PM CDTSevere Thunderstorm WarningFGFCavalier, Pembina47 min
Aug 27, 6:34 PM CDTSevere Thunderstorm WarningFGFCavalier, Pembina56 min
Aug 27, 6:48 PM CDTSevere Thunderstorm WarningFGFCavalier, Pembina42 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; radar from the NEXRAD Level II archive.