Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 260, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 2002, 5:31 PM CDT for Ramsey County, North Dakota. It was in force for 44 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
- Aug 26, 2002, 5:31 PM CDT (22:31 UTC)
- Expired
- Aug 26, 2002, 6:15 PM CDT
- In force
- 44 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Ramsey County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 26, 5:40 PM CDT | Hail 1.75 | Penn, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 26, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.5 hours before the alert went out and 210 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
- 292 J/kg
- Mixed-layer CIN
- -375 J/kg
- Mixed-layer LCL
- 1488 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
722 WUUS53 KFGF 262231 SVRFAR NDC071-262315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 530 PM CDT MON AUG 26 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 615 PM CDT. * AT 523 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTH OF PENN...OR ABOUT 11 MILES WEST OF DEVILS LAKE...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WEBSTER AT 535 PM AND GARSKE AT 540 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MONDAY EVENING FOR EASTERN NORTH DAKOTA. LAT...LON 4825 9919 4811 9896 4830 9871 4843 9891 BERG 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 26, 2:50 PM CDT, 2 hours 41 minutes earlier.
Area forecast discussion, Aug 26, 2:50 PM CDT, 2 hours 41 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 250 PM CDT MON AUG 26 2002 ...NEW SVR WATCH JUST ISSUED FOR ERN ND PER SPC CONF CALL... MAIN CHALLENGE IS SVR WX POTENTIAL TONIGHT. SFC MAP SHOWS CONTINUED WEAK FLOW OVER THE AREA MAKING BOUNDARY IDENTIFICATION DIFFICULT. SFC LOW IN SE WYOMING WITH A TROUGH NORTH INTO FAR WRN ND. OTHERWISE ERN/CNTRL ND AND WRN MN IN SOUTHEASTLY FLOW. DEW PTS HAVE MADE GOOD RECOVERY WITH MOST SITES IN THE 65 TO 70 RANGE...ONCE AGAIN A GOOD 4-8 DEGREES HIGHER THAN PROGGED BY ANY MODEL. MSAS SHOWS SFC LI DOWN TO -9 OVER NE ND AND ERN SD. VSBL SATELLITE HAS SHOWN TENDENCY FOR CU TO FORM IN AREA FROM BISMARCK TO JUST WEST OF GRAND FORKS...BUT NOT MUCH GROWTH SINCE 18Z. RADARS SHOW TSRA IN NRN SD BACKBUILDING WESTWARD INTO NW SD IN AREA OF THICKNESS DIFFLUENCE. .SHORT TERM... MODIFIED MESO ETA SOUNDINGS FOR TEMPS IN THE MID 80S AND DEW PTS IN THE UPR 60S SHOWS CAPES AT 00Z AROUND 3600 J/KG AND LI TO -10 AT KGFK. WATER VAPOR SHOWS SOME WEAK EMBEDDED SHORT WAVES MOVING SOUTH OF UPR LOW THRU SD/ND....BUT REALLLY HARD TO DISCERN WHICH ONE WILL SET OFF ACTIVITY. 85H JET/THETA-E VALUES INCREASE A BIT OVERNIGHT MAXING AROUND 06Z. BASED ON PAST DAYS WEATHER AND CURRENT INSTABILITY VALUES WOULD EXPECT SCT TSRA TO FIRE LATE THIS AFTN NORTHEAST OF BISMARCK WITH POTENTIAL FOR GROWTH INTO A LARGER AREA DURING THE EVENING. WILL CONTINUE MENTION OF SVR THIS EVENING FOR NW MN AND ERN ND. FZG LEVELS AROUND 11.5 KFT. THICKNESS FIELDS AND UPR FLOW ALOFT WOULD SUGGEST SLOW MOVES WITH POTENTIAL FOR BACKBUILDING OF ANY COMPLEX WHICH MAY FORM. THIS COULD GIVE LOCALLY HEAVY RAIN POTENTIAL. .LONGER TERM... 50H UPR LOW IN SRN SASK WILL DRIFT ENE VERY SLOWLY INTO SRN MANITOBA TUE-WED TIME FRAME AND WEAKEN FURTHER. 50H TEMPS WARM A BIT BUT LOW LEVEL MOISTURE REMAINS HIGH WITH DEW PTS HOLDING IN THE 60S. WITH CONTINUED SHORT WAVES MOVING THRU AREA IN BROAD SW FLOW WILL CONTINUE MENTION OF TSRA THRU WED. ETA BRINGS A TROUGH INTO ERN ND LATE WED AVN BRINGS IT THROUGH LATE TUESDAY. WILL LEAN TOWARD SLOWER ETA SOLN. WILL KEEP THURSDAY DRY AWAITING NEXT IMPULSE. WILL KEEP TEMPS NEARLY SAME THRU PD. .EXTENDED... LONG RANGE MODELS IN PRETTY GOOD AGREEMENT. 500MB TROF DEEPENS ALONG W US COAST...AS ANOTHER UPPER LEVEL TROF MOVES THROUGH THE REGION BY THE WEEKEND. THEN...UPPER LEVEL RIDGE STARTS BUILDING INTO THE AREA. WITH GOOD CONTINUITY TO PRIOR FORECAST...ONLY MINIMAL NEEDED TO BOTH PRECIPITATION AND TEMPERATURES. .FGF...NONE. RIDDLE/NG .FGF...NONE RIDDLE
In the hours before
Local storm report, Aug 26, 4:33 PM CDT, 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
433 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 PM 4 W ST. HILAIRE MN .88 INCH HAIL
08/26/02 PENNINGTON REPORTED BY PUBLIC.
0430 PM RED LAKE FALLS MN .75 INCH HAIL
08/26/02 RED LAKE REPORTED BY CO-OP OBSERVER.
DPORTERLocal storm report, Aug 26, 4:49 PM CDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
449 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0445 PM RED LAKE FALLS MN 1.00 INCH HAIL
08/26/02 RED LAKE REPORTED BY CO-OP
OBSERVER.
DPORTERLocal storm report, Aug 26, 5:04 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
504 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0430 PM RED LAKE FALLS MN 1.25 INCH HAIL
08/26/02 RED LAKE HAIL FELL FOR 25 MINUTES.
REPORTED BY CO-OP OBSERVER.
DPORTERLocal storm report, Aug 26, 5:13 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
513 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0455 PM 6 SW MINNEWAUKAN ND 1.00 INCH HAIL
08/26/02 BENSON REPORTED BY CO-OP
OBSERVER.
DPORTERLocal storm report, Aug 26, 5:19 PM CDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
519 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0512 PM 2 W TERREBONNE MN 1.00 INCH HAIL
08/26/02 RED LAKE SMALL BRANCHES DOWN.
DPORTERLocal storm report, Aug 26, 5:30 PM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
530 PM CDT MON AUG 26 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0500 PM MINNEWAUKAN ND .88 INCH HAIL
08/26/02 BENSON HAIL FELL FOR HALF AN
HOUR. REPORTED BY LAW
ENFORCEMENT.
DPORTERThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 12:36 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 39 min |
| Aug 26, 1:40 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey | 50 min |
| Aug 26, 5:02 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 43 min |
| Aug 26, 5:46 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 29 min |
| Aug 26, 6:00 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 45 min |
| Aug 26, 6:13 PM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 47 min |
| Aug 26, 6:48 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 42 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.