Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 58, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 2002, 9:42 AM CDT for Cass County, North Dakota. It was in force for 48 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 9, 2002, 9:42 AM CDT (14:42 UTC)
- Expired
- Jun 9, 2002, 10:30 AM CDT
- In force
- 48 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 52 km from the middle of the area, began a volume at 14:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 9, 10:05 AM CDT | Hail 0.75 | Gardner, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 12:00Z, 2.7 hours before the alert went out and 258 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
- 2010 J/kg
- Mixed-layer CIN
- -275 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 332 m²/s²
- 0-3 km storm-relative helicity
- 344 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 091442 SVRFAR NDC017-091530- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 942 AM CDT SUN JUN 9 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 1030 AM CDT. * AT 937 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER AMENIA...OR ABOUT 22 MILES NORTHWEST OF FARGO...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ARTHUR AT 945 AM AND GARDNER AT 1015 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4704 9739 4692 9721 4711 9686 4723 9714 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 Jun 9, 3:33 AM CDT, 6 hours 9 minutes earlier.
Area forecast discussion, Jun 9, 3:33 AM CDT, 6 hours 9 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 333 AM CDT SUN JUN 9 2002 .SHORT TERM... WATER VAPOR LOOP SHOWS UPPER LOW OVER THE PACIFIC NORTHWEST WITH A WAVE ON THE WEST SIDE. WAVE APPEARS TO BE DIGGING FARTHER TO THE SOUTHWEST THAN THE ETA FORECAST. SO PREFER THE SLOWER AVN FOR THE UPPER AIR FEATURES. HOWEVER PREFER THE ETA HANDLING THE PRECIPITATION OVER THE NORTHERN PLAINS. 850 THETA-E RIDGE WAS ACROSS EXTENDED FROM TX TO SD. GOOD E-W THETA-E GRADIENT WAS ACROSS ND WITH LOW LEVEL JET FLOW ACROSS THE GRADIENT. GRADIENT WILL SHIFT INTO SOUTHERN CANADA TODAY. ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED SUNDAY NIGHT AS DRIER/COOLER AIR MOVES INTO WESTERN ND. STORMS WILL FIRE IN THE WEST AND MOVE INTO THE EASTERN ND. ALSO LOW LEVEL JET REDEVELOPS SUNDAY NIGHT. DRIER/COOLER AIR CONTINUES TO MOVE INTO EASTERN ND ON MONDAY. WRAP AROUND PRECIPITATION WILL MOVE INTO FOR TUESDAY. .LONG TERM... NO CHANGES. .FGF...FLOOD WATCH ENTIRE FORECAST AREA TODAY THROUGH MONDAY. SEVERE THUNDERSTORM WATCH FOR SOUTHEAST ND AND PARTS OF NORTHEAST ND TIL 7AM CDT. HOPPES
In the hours before
Local storm report, Jun 9, 6:13 AM CDT, 3 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
613 AM CDT SUN JUN 9 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1220 AM DEVILS LAKE ND 1.00 INCH HAIL
06/09/02 RAMSEY
1224 AM DEVILS LAKE ND 1.25 INCH HAIL
06/09/02 RAMSEY
1230 AM REYNOLDS ND .75 INCH HAIL
06/09/02 TRAILL
0140 AM 5 E WAUBUN MN .75 INCH HAIL
06/09/02 MAHNOMEN
0230 AM GRAND FORKS ND FLASH FLOODS
06/09/02 GRAND FORKS NUMEROUS CITY STREETS
FLOODED. CARS STRANDED
ALONG UNIVERSITY AVENUE
NEAR THE UNIVERSITY OF
NORTH DAKOTA CAMPUS.
0325 AM 9 NE ADA MN WIND DAMAGE
06/09/02 NORMAN SPOTTER ESTIMATED 80 MPH
WIND GUST. 8 TO 10 INCH
DIAMETER TREES DOWN AND
WINDOW BLOWN OUT.
0505 AM 6 SE TWIN VALLEY MN .75 INCH HAIL
06/09/02 NORMAN
0605 AM 5 W SYRE MN FLASH FLOODS
06/09/02 NORMAN HIGHWAY 113 FLOODEDSpecial weather statement, Jun 9, 7:18 AM CDT, 2 hours 24 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-091400- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 718 AM CDT SUN JUN 9 2002 ...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA EARLY THIS MORNING AND AGAIN TONIGHT... SYNOPSIS...VERY UNSTABLE AIR WILL REMAIN ACROSS THE NORTHERN PLAINS THROUGH MONDAY MORNING. TEMPERATURES WILL RISE TO THE UPPER 80S IN THE SOUTH AND EASTERN COUNTIES WITH DEWPOINTS APPROACHING 70 DEGREES. LOW PRESSURE OVER WESTERN SOUTH DAKOTA WILL MOVE SLOWLY INTO SOUTHEAST NORTH DAKOTA BY MONDAY MORNING. COOLER DRIER AIR OVER WESTERN NORTH DAKOTA WILL BEGIN TO SLOWLY SHIFT EAST THROUGH MONDAY MORNING. AREA OF CONCERN...A SLIGHT RISK OF SEVERE WEATHER WILL OCCUR EARLY THIS MORNING SOUTH OF A LINE FROM VALLEY CITY ND TO BEMIDJI MN. ANOTHER SLIGHT RISK OF SEVERE STORM WILL OCCUR SUNDAY NIGHT OVER ALL OF EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA. TIME...UNTIL 10 AM CDT FOR THE SOUTHERN PORTION OF THE REGION. THE SECOND ROUND OF THUNDERSTORMS ARE EXPECTED AFTER 4 PM. TYPE OF HAZARD...MAINLY FLOODING. SOME LARGE HAIL AND SOME DAMAGING WINDS. HOPPES NNNN
Special weather statement, Jun 9, 7:20 AM CDT, 2 hours 22 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-101430- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 720 AM CDT SUN JUN 9 2002 ...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA TODAY AND THIS EVENING... SYNOPSIS...A WARM FRONT EXTENDS FROM NEAR BEMIDJI TO FARGO TO MOBRIDGE SOUTH DAKOTA. LOW PRESSURE WILL MOVE NORTHEAST ALONG THE FRONT TODAY. A MOIST AND UNSTABLE AIRMASS WILL EXIST OVER THE AREA TODAY AND THIS EVENING. THEN AS THE SYSTEM MOVES EAST OF THE AREA OVERNIGHT...THE THREAT FOR SEVERE WEATHER WILL END. AREA OF CONCERN...A SLIGHT RISK OF SEVERE WEATHER WILL OCCUR EARLY THIS MORNING NORTH OF A DEVILS LAKE TO GRAFTON TO BAUDETTE LINE. THEN ALL OF EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA IS UNDER A SLIGHT RISK LATER THIS AFTERNOON AND EARLY EVENING. TIME...FROM 7 AM UNTIL 10 AM THIS MORNING...AND THEN AGAIN FROM 3 PM UNTIL 9 PM THIS EVENING. TYPE OF HAZARD...LARGE HAIL...DAMAGING WIND GUSTS...AND FLOODING. RIDDLE NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 10:24 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 36 min |
| Jun 8, 10:59 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 46 min |
| Jun 8, 11:40 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 35 min |
| Jun 8, 11:58 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey | 47 min |
| Jun 9, 12:30 AM CDT | Severe Thunderstorm Warning | FGF | Nelson | 45 min |
| Jun 9, 12:37 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 38 min |
| Jun 9, 1:10 AM CDT | Flash Flood Warning | FGF | Eddy | 6 hr |
| Jun 9, 1:18 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 42 min |
| Jun 9, 1:45 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey | 45 min |
| Jun 9, 2:00 AM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 45 min |
| Jun 9, 2:06 AM CDT | Flash Flood Warning | FGF | Grand Forks | 6 hr |
| Jun 9, 3:34 AM CDT | Flash Flood Warning | FGF | Benson, Nelson, Ramsey | 6 hr |
| Jun 9, 6:47 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Ransom | 58 min |
| Jun 9, 7:15 AM CDT | Flash Flood Warning | FGF | Barnes, Cass | 4 hr |
| Jun 9, 7:17 AM CDT | Flash Flood Warning | FGF | Barnes, Cass | 4 hr |
| Jun 9, 11:33 AM CDT | Flash Flood Warning | FGF | Grand Forks | 6 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.