Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 199, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 11, 2002, 5:08 PM CDT for Benson County, Nelson County, Ramsey County, North Dakota. It was in force for 37 min. 5 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 11, 2002, 5:08 PM CDT (22:08 UTC)
- Expired
- Aug 11, 2002, 5:45 PM CDT
- In force
- 37 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 11, 5:30 PM CDT | Hail 0.75 | Doyon, ND | |
| Aug 11, 5:30 PM CDT | Hail 1.75 | Crary, ND | |
| Aug 11, 5:30 PM CDT | Hail 0.75 | Lakota, ND | |
| Aug 11, 5:35 PM CDT | Hail 0.75 | Devils Lake, ND | |
| Aug 11, 5:55 PM CDT | Hail 1.25 | Lakota, 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 11, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.1 hours before the alert went out and 209 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
- 194 J/kg
- Mixed-layer CIN
- -368 J/kg
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 423 m²/s²
- 0-3 km storm-relative helicity
- 466 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
269 WUUS53 KFGF 112208 SVRFAR NDC005-063-071-112245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 507 PM CDT SUN AUG 11 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN BENSON COUNTY IN NORTHEAST NORTH DAKOTA... WESTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA AND SOUTHEASTERN RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 545 PM CDT. * AT 504 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF DOYON...OR ABOUT 19 MILES SOUTHEAST OF DEVILS LAKE...MOVEMENT WAS TO THE NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WARWICK AT 515 PM... DOYON AT 525 PM... LAKOTA AT 535 PM AND MAPES 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 700 PM SUNDAY EVENING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4788 9888 4787 9854 4805 9816 4823 9842 30 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 11, 3:15 PM CDT, 1 hour 53 minutes earlier.
Area forecast discussion, Aug 11, 3:15 PM CDT, 1 hour 53 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 315 PM CDT SUN AUG 11 2002 ...FCST CHALLENGE IS SEVERE WEATHER THREAT THROUGH THIS EVENING... ANALYSIS/NEAR TERM...DISCUSSION IS ABBREVIATED DUE TO SEVERE WEATHER THREAT. SUPERCELL TSTMS DEVELOPING QUICKLY AHEAD OF A DEEPENING LOW PRESSURE SYSTEM IN SCNTRL ND...IN AREA OF LOW LVL MOISTURE CONVERGENCE. STRENGTHENING 500MB (50KT PLUS) JET STREAK NOW ROUNDING THE BASE OF THE 500MB TROF IN SOUTHWEST MT WILL PROVIDE INCREASING DYNAMIC SUPPORT FOR STRONG TSTM DEVELOPMENT AND ORGANIZATION THROUGH THE LATE AFTERNOON AND EVENING HOURS. SWOMCD PROJECTS POSSIBLE SQUALL LINE DEVELOPMENT...LATE AFTERNOON IN ERN ND THEN EARLY EVENING INTO WRN MN. SEVERE WATCH IN EFFECT ACROSS ERN ND ATTM. WILL POSSIBLY NEED ADDN WATCH INTO WRN MN BY EARLY EVENING AS LINE DEVELOPS. MONDAY AND TUESDAY...COLD POOL ALOFT SHIFTS ACROSS THE NRN PLAINS ON MONDAY WITH SHOWERS EXPECTED TO REDEVLOP BY MID AFTERNOON. UPPER LVL TROUGH THEN ANCHORS OVR THE NRN PLAINS THROUGH THE MIDWEEK PERIOD KEEPING AREA UNDER SEASONABLY COOLER FLOW NEXT WEAK IMPULSE INTO THE AREA LATE AFTERNOON TUESDAY. SOME DRYING POSSIBLE BY LATE WEK PERIOD THOUGH TEMPS REMAIN BELOW SEASONAL NORMALS. .FGF...SEVERE THUNDERSTORM WATCH FOR EASTERN ND THIS EVENING. GUST
In the hours before
Special weather statement, Aug 11, 12:15 PM CDT, 4 hours 53 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-112000- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1215 PM CDT SUN AUG 11 2002 ...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN NORTH DAKOTA AND WEST CENTRAL AND NORTHWEST MINNESOTA THIS AFTERNOON AND TONIGHT... SYNOPSIS...LOW LEVEL MOISTURE WILL INCREASE INTO THE EASTERN DAKOTAS AND WESTERN MINNESOTA THROUGHTHE AFTERNOON...AHEAD OF A STRENGTHENING LOW PRESSURE SYSTEM. SCATTERED THUNDERSTORMS WILL DEVELOP IN EASTERN NORTH DAKOTA BY LATE AFTERNOON...WITH A THREAT OF LARGE HAIL AND ISOLATED TORNADOES. THESE STORMS WILL LIKELY BECOME STRONGER AND MORE ORGANIZED THROUGH EARLY EVENING AS UPPER LEVEL WINDS INCREASE. THROUGH THE EVENING...STORMS MAY BECOME ORGANIZED INTO A SQUALL LINE...WITH THE POTENTIAL TO PRODUCE AREAS OF DAMAGING DOWNBURST WINDS. AREA OF CONCERN...ENTIRE AREA. TIME...4 PM THROUGH 2 AM. TYPE OF HAZARD...LARGE HAIL AND ISOLATED TORNADOES LATE AFTERNOON THROUGH EARLY EVENING...MAINLY DAMAGING WINDS THROUGH LATE EVENING. GUST NNNN
Special weather statement, Aug 11, 12:15 PM CDT, 4 hours 53 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-112000- SPECIAL WEATHER STATEMENT...CORRECTED... HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1215 PM CDT SUN AUG 11 2002 ...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN NORTH DAKOTA AND WEST CENTRAL AND NORTHWEST MINNESOTA THIS AFTERNOON AND TONIGHT... SYNOPSIS...LOW LEVEL MOISTURE WILL INCREASE INTO THE EASTERN DAKOTAS AND WESTERN MINNESOTA THROUGH THE AFTERNOON...AHEAD OF A STRENGTHENING LOW PRESSURE SYSTEM. SCATTERED THUNDERSTORMS WILL DEVELOP IN EASTERN NORTH DAKOTA BY LATE AFTERNOON...WITH A THREAT OF LARGE HAIL AND ISOLATED TORNADOES. THESE STORMS WILL LIKELY BECOME STRONGER AND MORE ORGANIZED THROUGH EARLY EVENING AS UPPER LEVEL WINDS INCREASE. THROUGH THE EVENING...STORMS MAY BECOME ORGANIZED INTO A SQUALL LINE...WITH THE POTENTIAL TO PRODUCE AREAS OF DAMAGING DOWNBURST WINDS. AREA OF CONCERN...ENTIRE AREA. TIME...4 PM THROUGH 2 AM. TYPE OF HAZARD...LARGE HAIL AND ISOLATED TORNADOES LATE AFTERNOON THROUGH EARLY EVENING...MAINLY DAMAGING WINDS THROUGH LATE EVENING. GUST NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 4:54 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 51 min |
| Aug 11, 5:44 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 61 min |
| Aug 11, 5:47 PM CDT | Severe Thunderstorm Warning | FGF | Nelson, Ramsey, Walsh | 43 min |
| Aug 11, 5:54 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 51 min |
| Aug 11, 6:29 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 56 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.