Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 190, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 8, 2002, 11:15 PM CDT for Benson County, Nelson County, Ramsey County, North Dakota. It was in force for 60 min. 4 reports 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
- Aug 8, 2002, 11:15 PM CDT (04:15 UTC)
- Expired
- Aug 9, 2002, 12:15 AM CDT
- In force
- 60 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Benson County, ND, Nelson County, ND, Ramsey County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 11:15 PM CDT | Thunderstorm Wind | Maddock, ND | Trees were blown down. |
| Aug 8, 11:42 PM CDT | Thunderstorm Wind 73 M | Minnewaukan, ND | |
| Aug 9, 12:01 AM CDT | Thunderstorm Wind | Minnewaukan, ND | Trees and power lines were blown down. Some customers lost power for 10 hours. |
| Aug 9, 12:05 AM CDT | Thunderstorm Wind | Churchs Ferry, ND | Strong winds destroyed a 45,000 bushel grain bin and deposited it on the adjacent railroad tracks. An AMTRAK train was delayed for two hours while the debris was cleaned up. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 8, 8:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 4.3 hours before the alert went out and 186 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
- 863 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1927 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
911 WUUS53 KFGF 090415 SVRFAR NDC005-063-071-090515- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1114 PM CDT THU AUG 8 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BENSON COUNTY IN NORTHEAST NORTH DAKOTA... NELSON COUNTY IN NORTHEAST NORTH DAKOTA AND RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 1215 AM CDT. * AT 1109 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 36 MILES WEST OF DEVILS LAKE TO 40 MILES SOUTHEAST OF DEVILS LAKE... MOVEMENT WAS TO THE NORTHEAST AT 40 MPH. WINDS TO 65 MPH WERE REPORTED AT NEW ROCKFORD WITH THIS LINE OF THUNDERSTORMS. WINDS OVER 60 MPH WILL BE LIKELY AS THESE STORMS MOVE THROUGH THE DEVILS LAKE REGION. * SEVERE THUNDERSTORMS WILL BE NEAR... MADDOCK AT 1115 PM... OBERON AT 1120 PM... TOKIO AT 1130 PM... DEVILS LAKE AT 1135 PM AND LAKOTA AT 1140 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM FRIDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4790 9977 4784 9804 4829 9843 4834 9955 DTR 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 8, 10:05 PM CDT, 1 hour 10 minutes earlier.
Area forecast discussion, Aug 8, 10:05 PM CDT, 1 hour 10 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1005 PM CDT THU AUG 8 2002 FORECAST CHALLENGE FOR TODAY IS PRECIPITATION. LATEST SATELLITE IMAGERY SHOWS VARIETY OF CLOUD DECKS ALONG WITH SOME PATCHY FOG SCATTERED ACROSS THE AREA. KMVX HAS ONE THUNDERSTORM CLUSTER MOVING THROUGH WC MN...WITH SHOWERS MOVING INTO E ND. CURRENT MSAS SURFACE ANALYSIS SHOWS SURFACE LOW CENTERED IN SW MB...WITH FRONT EXTENDING THROUGH ND ALONG A MOT-BIS-MBG LINE. WHEN COMPARING MSAS DATA TO MODEL INITIALIZATIONS...ALL MODELS SIMILAR IN MOVING SURFACE FRONT INTO AREA...WITH UPPER LEVEL FLOW PARALLEL TO FRONT AS SHORTWAVE MOVES THROUGH UPPER LEVEL FLOW. CONSIDERING THAT HAVE PLENTY OF MOISTURE AVAILABLE IN LOW LEVELS (DEWPOINTS IN 65 TO 75 RANGE) AND ALSO PRECIPITABLE WATERS ON MODEL SOUNDINGS FROM 1.75 TO 2.0 INCHES...HEAVY RAINS REMAIN POSSIBLE...SO NO CHANGES NEEDED TO FLOOD WATCH FOR AREA AT THIS TIME. ONLY MINOR CHANGE NEEDED REST OF FORECAST. .FGF...FLOOD WATCH FOR DVL AREA TODAY AND TONIGHT...FOR RRV THIS AFTERNOON AND TONIGHT...AND FOR REST OF MN TONIGHT AND FRIDAY. NG
In the hours before
Local storm report, Aug 8, 7:22 PM CDT, 3 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
722 PM CDT THU AUG 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0305 PM 4 NW SOUTHAM ND .75 INCH HAIL
08/08/02 RAMSEY
0330 PM 3 W BARTLET ND .88 INCH HAIL
08/08/02 RAMSEY
0415 PM 8 W VALLEY CITY ND 1.00 INCH HAIL
08/08/02 BARNES
0450 PM FINLEY ND WIND DAMAGE
08/08/02 STEELE BUILDING UNDER
CONSTRUCTION COLAPSED.
ESTIMATED 75 MPH WINDS.
0450 PM FINLEY ND .75 INCH HAIL
08/08/02 STEELE
0515 PM COLGATE ND .75 INCH HAIL
08/08/02 STEELE
0530 PM 7 E HOPE ND .88 INCH HAIL
08/08/02 STEELE
0542 PM 1 S EMERADO ND .75 INCH HAIL
08/08/02 GRAND FORKS
0542 PM 1 S EMERADO ND 60 MPH WIND GUST
08/08/02 GRAND FORKS
0550 PM 7 E GRAND FORKS AFB ND .75 INCH HAIL
08/08/02 GRAND FORKS
0555 PM GRAND FORKS ND .88 INCH HAIL
08/08/02 GRAND FORKS @ FGF WFO.
0555 PM GRAND FORKS ND 59 MPH WIND GUST
08/08/02 GRAND FORKS @ FGF WFO.
0600 PM 6 W GRAND FORKS ND 62 MPH WIND GUST
08/08/02 GRAND FORKS @ KGFK AIRPORT.
0605 PM EAST GRAND FORKS MN WIND DAMAGE
08/08/02 POLK TREE DAMAGE, 4-5 DIA.
0625 PM 6 S BLABON ND .75 INCH HAIL
08/08/02 STEELE
0625 PM 6 S BLABON ND 60 MPH WIND GUST
08/08/02 STEELE
0645 PM 6 NE HOPE ND 1.00 INCH HAIL
08/08/02 STEELELocal storm report, Aug 8, 8:06 PM CDT, 3 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED...
NATIONAL WEATHER SERVICE GRAND FORKS, ND
806 PM CDT THU AUG 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0305 PM 4 NW SOUTHAM ND .75 INCH HAIL
08/08/02 RAMSEY
0330 PM 3 W BARTLET ND .88 INCH HAIL
08/08/02 RAMSEY
0415 PM 8 W VALLEY CITY ND 1.00 INCH HAIL
08/08/02 BARNES
0450 PM FINLEY ND WIND DAMAGE
08/08/02 STEELE BUILDING UNDER
CONSTRUCTION COLAPSED
ESTIMATED 75 MPH WINDS
0450 PM FINLEY ND .75 INCH HAIL
08/08/02 STEELE
0515 PM COLGATE ND .75 INCH HAIL
08/08/02 STEELE
0530 PM 7 E HOPE ND .88 INCH HAIL
08/08/02 STEELE
0542 PM 1 S EMERADO ND .75 INCH HAIL
08/08/02 GRAND FORKS
0542 PM 1 S EMERADO ND 60 MPH WIND GUST
08/08/02 GRAND FORKS
0550 PM 7 E GRAND FORKS AFB ND .75 INCH HAIL
08/08/02 GRAND FORKS
0555 PM GRAND FORKS ND .88 INCH HAIL
08/08/02 GRAND FORKS FGF WFO
0555 PM GRAND FORKS ND 59 MPH WIND GUST
08/08/02 GRAND FORKS FGF WFO
0600 PM 6 W GRAND FORKS ND 62 MPH WIND GUST
08/08/02 GRAND FORKS KGFK AIRPORT
0605 PM EAST GRAND FORKS MN WIND DAMAGE
08/08/02 POLK TREE DAMAGE...4-5 INCH DIA
0625 PM 6 S BLABON ND .75 INCH HAIL
08/08/02 STEELE
0625 PM 6 S BLABON ND 60 MPH WIND GUST
08/08/02 STEELE
0645 PM 6 NW HOPE ND 1.00 INCH HAIL
08/08/02 STEELELocal storm report, Aug 8, 9:35 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
935 PM CDT THU AUG 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0855 PM GRAND FORKS ND .88 INCH HAIL
08/08/02 GRAND FORKS NWS EMPLOYEE
0900 PM GRAND FORKS ND .75 INCH HAIL
08/08/02 GRAND FORKS KGFK POLICE DEPT
0931 PM ROSEAU MN 67 MPH TSTORM WIND
08/08/02 ROSEAU AWOS REPORT
DPThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:23 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 37 min |
| Aug 8, 7:30 PM CDT | Tornado Warning | FGF | Traill | 45 min |
| Aug 8, 7:31 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 44 min |
| Aug 8, 8:37 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 38 min |
| Aug 8, 9:59 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 46 min |
| Aug 8, 10:34 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 41 min |
| Aug 8, 11:05 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 40 min |
| Aug 8, 11:26 PM CDT | Tornado Warning | FGF | Benson | 49 min |
| Aug 8, 11:29 PM CDT | Severe Thunderstorm Warning | FGF | Steele | 46 min |
| Aug 9, 12:19 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey | 41 min |
| Aug 9, 12:21 AM CDT | Flash Flood Warning | FGF | Walsh | 6 hr |
| Aug 9, 12:24 AM CDT | Severe Thunderstorm Warning | FGF | Towner | 51 min |
| Aug 9, 12:56 AM CDT | Severe Thunderstorm Warning | FGF | Pembina | 49 min |
| Aug 9, 12:59 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.