Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 236, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 2002, 5:07 PM CDT for Cavalier County, North Dakota. It was in force for 38 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, 5:07 PM CDT (22:07 UTC)
- Expired
- Aug 23, 2002, 5:45 PM CDT
- In force
- 38 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Cavalier County, ND
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.1 hours before the alert went out and 276 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
600 WUUS53 KFGF 232207 SVRFAR NDC019-232245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 506 PM CDT FRI AUG 23 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 545 PM CDT. * AT 500 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 33 MILES NORTHWEST OF ALSEN...OR ABOUT 35 MILES NORTHWEST OF LANGDON...MOVEMENT WAS TO THE SOUTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SARLES AT 515 PM. HANNAH AT 520 PM. WALES AT 525 PM. ALSEN AT 545 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4911 9888 4908 9903 4858 9878 4860 9837 30 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 Aug 23, 1:09 PM CDT, 3 hours 58 minutes earlier.
Area forecast discussion, Aug 23, 1:09 PM CDT, 3 hours 58 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 109 PM CDT FRI AUG 23 2002 ...FORECAST CHALLENGE WILL BE PRECIPITATION CHANCES OVERNIGHT... .CURRENT OBSERVATIONS... WEAK SURFACE FRONT LOCATED WELL NORTH OF THE BORDER AND IS SLOWLY MOVING SOUTH. SHORT WAVE EVIDENT ON WATER VAPOR IMAGERY ALONG AND AHEAD OF FRONT. A FEW LIGHTNING STRIKES HAVE BEEN NOTED ALONG FRONT. DEWPOINTS ACROSS AREA REMAIN IN THE MID 60S WITH ALL MODELS UNDERDOING THE LOW LEVEL MOISTURE. .SHORT TERM... MAIN CHALLENGE IS THUNDER OVERNIGHT. SOME LOW LEVEL MOISTURE PRESENT BUT LIMITED ABOVE THIS LAYER. SOME WEAK SURFACE/850MB CONVERGENCE AND INSTABILITY TONIGHT. WILL PUT ISOLATED MENTION ACROSS MUCH OF THE FORECAST AREA(FA) WITH SLIGHTLY HIGHER POPS ACROSS NORTHWEST MINNESOTA. .MID TERM... WEAK SURFACE HIGH WILL PUSH FRONT SOUTH OF FA ON SATURDAY AND WILL KEEP PRECIPITATION OUT OF THE REGION UNTIL SUNDAY NIGHT. BY SUNDAY NIGHT...UPPER LEVEL LOW EJECTS OUT OF THE PACIFIC NORTHWEST AND INTO THE NORTHERN HIGH PLAINS. SEVERAL WAVES EXPECTED TO ROTATE AROUND SYSTEM AND WILL BRING CHANCE OF THUNDERSTORMS TO THE RED RIVER VALLEY AND AREAS WEST INTO MONDAY...HOWEVER MOISTURE WILL BE LIMITED WITH A BLOCKING PATTERN TO THE SOUTH. .EXTENDED FORECAST... ECMWF IS ODD MODEL OUT IS SHOWING AMPLIFYING UPR LOW AND COLD AIR DROPPING SOUTHEAST TOWARD NRN MN BY 12Z THU. NCEP ENSEMBLES/NOGAPS/MRF/CANADIAN ALL GO AGAINST THIS SHOWING MAIN POLAR JET AND COLD AIR WELL NORTH ACROSS NRN CANADA WITH MUCH WEAKER 50H SYSTEMS DROPPING THRU NRN PLAINS TUE-WED TIME FRAME. CANADIAN AND NOGAPS ARE EVEN WEAKER THAN THE MRF AND WOULD IMPLY ONLY SMALL CHANCES OF PCPN TUE-WED VERSUS HEAVIER QPF OF MRF. BELIEVE THIS MAY BE RIGHT. WILL HOWEVER STILL KEEP CHC IN PER CURRENT EXTENDED FOR TUE-WED...THEN DRY THU-FRI AND STILL MILD WITH NEAR NORMAL TEMPS. .FGF...NONE DONAVON/RIDDLE
In the hours before
Special weather statement, Aug 23, 3:50 PM CDT, 1 hour 17 minutes before
MNZ001>009-013>017-022>024-027>031-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-232345- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 350 PM CDT FRI AUG 23 2002 ...ISOLATED SEVERE THUNDERSTORMS POSSIBLE TONIGHT ACROSS NORTHEAST NORTH DAKOTA AND ADJACENT NORTHWEST MINNESOTA... SYNOPSIS... SCATTERED THUNDERSTORMS ARE EXPECTED TONIGHT ACROSS EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA. A WEAK COLD FRONT WILL MOVE FROM NORTH TO SOUTH ACROSS THE REGION OVERNIGHT. MOISTURE ASSOCIATED ALONG THE FRONT COUPLED WITH LIFT FROM AN UPPER LEVEL DISTURBANCE WILL ENHANCE THUNDERSTORM ACTIVITY THIS EVENING ALONG THE INTERNATIONAL BORDER...AS THE THUNDERSTORMS MOVE INTO THE AREA AFTER 5 PM. AREA OF CONCERN... NORTHEAST NORTH DAKOTA AND ADJACENT PORTIONS OF NORTHWEST MINNESOTA. TIME... 5 PM UNTIL 10 PM. TYPE OF HAZARD... LARGE HAIL WILL BE THE MAIN THREAT. KELLENBENZ NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 4:52 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 38 min |
| Aug 23, 5:30 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 45 min |
| Aug 23, 5:42 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 48 min |
| Aug 23, 5:44 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 46 min |
| Aug 23, 6:13 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 47 min |
| Aug 23, 6:20 PM CDT | Tornado Warning | FGF | Pembina | 40 min |
| Aug 23, 6:32 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey | 43 min |
| Aug 23, 6:43 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 47 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.