Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 131, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2002, 6:12 AM CDT for Richland County, North Dakota. It was in force for 48 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
- Jul 21, 2002, 6:12 AM CDT (11:12 UTC)
- Expired
- Jul 21, 2002, 7:00 AM CDT
- In force
- 48 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Richland 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
Aberdeen, SD (KABR), launched 00:00Z, 11.2 hours before the alert went out and 182 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
- 2314 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 2061 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
142 WUUS53 KFGF 211112 SVRFAR NDC077-211200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 611 AM CDT SUN JUL 21 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 700 AM CDT. * AT 608 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTH OF LAMARS...OR ABOUT 18 MILES SOUTH OF WAHPETON...MOVEMENT WAS TO THE NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FAIRMOUNT AT 615 AM. THIS THUNDERSTORM HAS A HISTORY OF WIND GUSTS OVER 70 MPH. TAKE SHELTER IF IN THE PATH OF THIS STORM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4605 9684 4590 9671 4587 9653 4628 9668 8 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 Jul 21, 2:05 AM CDT, 4 hours 7 minutes earlier.
Area forecast discussion, Jul 21, 2:05 AM CDT, 4 hours 7 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 205 AM CDT SUN JUL 21 2002 FORECAST CHALLENGE IS PRECIP THREAT TODAY...THEN TEMPS .OVERVIEW... MAIN SFC COLD FRONT STILL SLOWLY PUSHING INTO NORTHEAST ND THIS AM...WITH ABUNDANT MOISTURE/INSTABILITY FROM GFK AND POINTS SOUTH AND EAST. ONE AREA OF ELEVATED CONVECTION IN CENTRAL MN JUST EAST OF AREA IN STRONG 850MB WARM AIR ADVECTION...ANOTHER PUSHING INTO NORTH CENTRAL SD IN LEFT EXIT REGION OF 40KT 850MB JET AHEAD OF 500MB SHORTWAVE MOVING INTO WESTERN DAKOTAS. MODELS STILL HAVING HARD TIME WITH CURRENT SET UP...BUT ETA DID BEST WITH MOISTURE/INSTABILITY SO WILL UTILIZE. .SHORT TERM... WILL MENTION PATCHY FOG IN ALL BUT NORTHERN ZONES THIS MORNING...WITH ABUNDANT LOW LEVEL MOISTURE AND WEAK SFC FLOW. MAIN 850MB FRONT AND UPPER SUPPORT MOVES THROUGH REGION TODAY...EXPECT A ROUND OF THUNDERSTORMS ACROSS SOUTHERN 2/3 OF FA SOUTH OF A GFK TO BJI LINE. CAPES STILL AROUND 2000J/KG FROM 12-18Z IN FAR SOUTH...SO WOULDN/T RULE OUT AN ISOLATED SEVERE EVENT HERE WITH NEW SLIGHT RISK AREA IN SWODY1 NEAR SOUTHEAST REGION. BEST 850MB COOLING WORKS INTO REGION THIS AFTERNOON...SO ONLY THING THAT WILL LIMIT INSOLATION IS CLOUD COVER. EXPECT TEMPS TO BE ABOUT 5 DEGREES COOLER THAN YESTERDAY...AS DRIER AIR FILTERS INTO REGION BY AFTERNOON. .LONG TERM... 850MB TEMPS COOL TO AROUND +8C BY MONDAY AFTERNOON...AS DRY HIGH PRESSURE SETTLES OVER REGION BY TUESDAY. THIS WILL MEAN TEMPS BELOW NORMAL FOR MONDAY TUESDAY...WITH LOWS TUESDAY MORNING INTO THE UPPER 40S NORTH TO AROUND 50 SOUTH...ALMOST 20 DEGREES BELOW NORMAL. .EXTENDED... NO CHANGES PLANNED AT THIS TIME. .FGF...NONE. KELLENBENZ
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 4:33 AM CDT | Severe Thunderstorm Warning | FGF | Sargent | 57 min |
| Jul 21, 5:14 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 61 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.