Alert archive / Minnesota / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 42, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 21, 2003, 10:20 PM CDT for Pennington County, Minnesota. It was in force for 40 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
- Jun 21, 2003, 10:20 PM CDT (03:20 UTC)
- Expired
- Jun 21, 2003, 11:00 PM CDT
- In force
- 40 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Pennington County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 108 km from the middle of the area, began a volume at 03:22 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.
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 |
|---|---|---|---|
| Jun 21, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 3.3 hours before the alert went out and 217 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
- 1935 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
987 WUUS53 KFGF 220320 SVRFGF MNC113-220400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1019 PM CDT SAT JUN 21 2003 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PENNINGTON COUNTY IN NORTHWEST MINNESOTA. * UNTIL 1100 PM CDT. * AT 1017 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTH OF CARPENTERS CORNER...OR ABOUT 15 MILES SOUTHWEST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE EAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CARPENTERS CORNER AT 1020 PM... ST. HILAIRE AT 1030 PM... HAZEL AT 1035 PM AND MAVIE AT 1045 PM. DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED BUILDING IMMEDIATELY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM SUNDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4815 9648 4798 9646 4801 9566 4817 9565 $$ HOPPES
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 21, 8:55 PM CDT, 1 hour 25 minutes earlier.
Area forecast discussion, Jun 21, 8:55 PM CDT, 1 hour 25 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 855 PM CDT SAT JUN 21 2003 MAIN FORECAST CHALLENGE IS SVR WEATHER. CURRENT SATELLITE IMAGERY SHOWS LARGE AREA OF CONVECTION MOVING FROM CENTRAL ND INTO E ND. LATEST MSAS SURFACE ANALYSIS HAS SURFACE LOW CENTERED S OF MBG WITH TROF EXTENDING THROUGH E ND ALONG A DVL TO JMS LINE. ETA AND GFS BOTH INITIALIZED PRETTY CLOSE. AREA REMAINS UNDER GUN FOR SEVERE WEATHER THROUGH THE NIGHT AS TROF CONTINUES MOVING SLOWLY E OVERNIGHT. CURRENT SEVERE WEATHER REPORTS HAVE HAD WINDS UP TO 70 MPH AND HAIL UP TO 1.5 INCHES...WITH STORMS EXPECTED TO MOVE INTO A MORE MOIST ENVIRONMENT AND INTERACT WITH SHORTWAVE THAT IS PUSHING INTO AREA. CONSEQUENTLY...WATCH UNTIL 2 AM LOOKS GOOD. AS FAR AS WIND ADVISORY...A FEW SITES STILL GUSTING TO AROUND 35 MPH...BUT WITH SEVERE WEATHER MAIN CONCERN...WILL LET WIND ADVISORY EXPIRE AT 9 PM CDT. ALL IN ALL...FORECAST IN PRETTY GOOD SHAPE WITH ONLY MINOR CHANGES NEEDED. .FGF...SEVERE THUNDERSTORM WATCH ALL BUT FAR E COUNTIES UNTIL 2 AM CDT. NG
Hazardous weather outlook, Jun 21, 5:47 AM CDT, 16 hours 33 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-211400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 547 AM CDT SAT JUN 21 2003 ...SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA THIS AFTERNOON THROUGH SUNDAY NIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA THIS AFTERNOON THROUGH SUNDAY. SEVERE THUNDERSTORMS MAY DEVELOP BY 3 PM THIS AFTERNOON IN EASTERN NORTH DAKOTA...THEN MOVE EAST INTO MINNESOTA THROUGH THE OVERNIGHT HOURS. THE MAIN THREAT WILL BE LARGE HAIL AND DAMAGING WINDS...ALTHOUGH THERE IS THE CHANCE FOR A FEW ISOLATED TORNADOES LATE THIS AFTERNOON AND EVENING ACROSS EASTERN NORTH DAKOTA AND EXTREME NORTHWEST AND WEST CENTRAL MINNESOTA. IN ADDITION ...SOME THUNDERSTORMS MAY PRODUCE LOCALIZED HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA ON SUNDAY. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ON SUNDAY ALONG AND SOUTH OF A LIDGERWOOD TO WAHPETON TO WADENA LINE. THE MAIN THREAT WILL BE LARGE HAIL AND DAMAGING WIND...WITH ISOLATED TORNADOES IN THE MODERATE RISK AREA. THUNDERSTORMS SHOULD DIMINISH SUNDAY MORNING...BUT ONCE AGAIN DEVELOP EARLY SUNDAY AFTERNOON ACROSS THE ENTIRE REGION AND PERSIST THROUGH SUNDAY NIGHT. HEAVY RAIN IS ONCE AGAIN POSSIBLE...WHICH MAY CAUSE LOCALIZED FLOODING...ESPECIALLY TO AREAS RECEIVING HEAVY RAIN ON SATURDAY AND SATURDAY NIGHT. THERE IS THE CHANCE FOR THUNDERSTORMS ACROSS THE REGION MONDAY NIGHT AND TUESDAY...THEN AGAIN ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED LATER THIS AFTERNOON THROUGH SUNDAY NIGHT ACROSS THE AREA. KELLENBENZ
In the hours before
Local storm report, Jun 21, 8:55 PM CDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
855 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0845 PM ORISKA ND WIND DAMAGE
06/21/03 BARNES 3 TREE LIMBS
BROKENREPORTED BY PUBLIC.
MMLLocal storm report, Jun 21, 9:20 PM CDT, 1 hour before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
920 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0855 PM FINLEY ND .75 INCH HAIL
06/21/03 STEELE REPORTED BY LAW
ENFORCEMENT.
MMLLocal storm report, Jun 21, 9:47 PM CDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
947 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0942 PM GRAND FORKS ND 67 MPH WIND GUST
06/21/03 GRAND FORKS REPORTED AT NWS FGF.
0945 PM GRAND FORKS ND WIND DAMAGE
06/21/03 GRAND FORKS LARGE TREES DOWN. REPORTED
BY OFF DUTY NWS EMPLOYEE.
NGLocal storm report, Jun 21, 9:59 PM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
959 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0927 PM 3 N ARVILLA ND WIND DAMAGE
06/21/03 GRAND FORKS 3 INCH TREE LIMBS DOWN AT
TURTLE RIVER STATE PARK.
REPORTED BY HAM RADIO
OPERATOR.
NGLocal storm report, Jun 21, 10:04 PM CDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1004 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0941 PM 8 W GRAND FORKS ND 58 MPH WIND GUST
06/21/03 GRAND FORKS REPORTED BY ASOS AT GRAND
FORKS AIRPORT.
NGLocal storm report, Jun 21, 10:10 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1010 PM CDT SAT JUN 21 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0950 PM 2 SW GRANDIN ND 1.00 INCH HAIL
06/21/03 CASS REPORTED BY PUBLIC.
NGThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 9:37 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 23 min |
| Jun 21, 9:54 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman | 51 min |
| Jun 21, 10:01 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 44 min |
| Jun 21, 10:46 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 44 min |
| Jun 21, 10:49 PM CDT | Severe Thunderstorm Warning | FGF | Mahnomen | 41 min |
| Jun 22, 5:48 PM CDT | Severe Thunderstorm Warning | FGF | Grant | 42 min |
| Jun 22, 6:03 PM CDT | Flash Flood Warning | FGF | Clay, Wilkin | 12 hr |
| Jun 22, 6:24 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 36 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2003Every severe thunderstorm warning in 2003
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.