Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 86, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 24, 2001, 3:31 AM CDT for Cass County, North Dakota. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 24, 2001, 3:31 AM CDT (08:31 UTC)
- Expired
- Jun 24, 2001, 4:15 AM CDT
- In force
- 44 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 58 km from the middle of the area, began a volume at 08:30 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
Aberdeen, SD (KABR), launched 00:00Z, 8.5 hours before the alert went out and 248 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.
- Mixed-layer CAPE
- 929 J/kg
- Mixed-layer CIN
- -360 J/kg
- Mixed-layer LCL
- 2075 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 240831 SVRFAR NDC017-240915- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 331 AM CDT SUN JUN 24 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CASS COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 415 AM CDT * AT 325 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES NORTHEAST OF TOWER CITY...OR ABOUT 19 MILES EAST OF VALLEY CITY...MOVEMENT WAS TO THE EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... AYR AT 335 AM CDT... ERIE AT 340 AM CDT... ABSARAKA AT 345 AM CDT... WHEATLAND AT 350 AM CDT... sREMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4713 9765 4692 9770 4677 9687 4709 9692 $$ DJK NNNN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 24, 2:20 AM CDT, 1 hour 11 minutes earlier.
Area forecast discussion, Jun 24, 2:20 AM CDT, 1 hour 11 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 220 AM CDT SUN JUN 24 2001 ...MAIN FORECAST CHALLENGE CENTERS ON CONVECTIVE POTENTIAL THROUGH PERIOD... .CURRENT OBSERVATIONAL OVERVIEW... 07Z MSAS ANALYSIS DEPICTED DOUBLE BARREL LOW PRESSURE OVER THE DAKOTAS WITH ASSOCIATED TROUGH AXIS FROM WESTERN SOUTH DAKOTA INTO EXTREME NORTHWEST MINNESOTA. CONVECTION FIRING AHEAD OF FEATURE PER LATEST RADAR MOSAIC WHERE ENHANCED MOISTURE FLUX CONVERGENCE WAS EVIDENT. IN ADDITION CONVECTION BEING JUICED BY STRONG LOW-LEVEL INSTABILITY I.E. CAPES 2000-3000 J/KG...LIS TO MINUS 5 AND LOW LEVEL JET PUNCH...PER RUC ANALYSIS AND KMVX VAD WIND PROFILE. .FORECAST DETAILS... PERIODIC CONVECTIVE THREAT PERSISTS ACROSS PORTIONS OF THE NORTHERN PLAINS THROUGH SHORT TERM PERIOD AS EMBEDDED PIECES OF SHORTWAVE ENERGY EJECTING OUT OF MEAN LONGWAVE TROUGH OVER PACIFIC NORTHWEST RIDES NORTHEAST OVER TOP OF PLAINS MID-LEVEL RIDGE INTO SOUTHERN CANADA. DESPITE MUCH OF BETTER UPPER LEVEL SUPPORT REMAINING NORTH IN CANADA FEEL ENOUGH STRONG THERMODYNAMIC PARAMETERS PRESENT TO WARRANT SCATTERED POP THREAT. EXAMINATION OF FORECASTED SOUNDINGS SUGGESTS MUCH OF CWA WILL HAVE TO OVERCOME DEATH CAP (12C-14C 700MB TEMPS AND HIGH CINS) BASED ON THIS WILL ONLY KEEP POPS GOING FOR AREAS NORTH OF HIGHWAY 2 WHERE ENOUGH OF WEAKNESS PRESENT (VICINITY OF NORTHERN PERIPHERY OF CAP). NO CHANGES TO EXTENDED PLANNED ATTM. .FGF...NONE. BERG
Nearby
Severe Thunderstorm Warnings in North Dakota, 2001Every severe thunderstorm 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.