Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 8, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at May 4, 1999, 2:20 PM CDT for Towner County, North Dakota. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 4, 1999, 2:20 PM CDT (19:20 UTC)
- Expired
- May 4, 1999, 2:55 PM CDT
- In force
- 35 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Towner County, ND
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.3 hours before the alert went out and 239 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
- 1250 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 May 4, 9:55 AM CDT, 4 hours 25 minutes earlier.
Area forecast discussion, May 4, 9:55 AM CDT, 4 hours 25 minutes before
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</html>Hazardous weather outlook, May 3, 6:45 PM CDT, 19 hours 35 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-031400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 645 PM CDT MON MAY 3 1999 ...A FEW SEVERE THUNDERSTORMS ARE POSSIBLE OVER EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA... .SYNOPSIS...AN UPPER-LEVEL DISTURBANCE EXITING THE AREA OVER SOUTHERN CANADA THIS EVENING HAS BEEN PRODUCING WIDELY SCATTERED THUNDERSTORMS...SOME OF WHICH HAVE BEEN SEVERE FOR A BRIEF TIME OVER NORTHERN BELTRAMI COUNTY. AS THIS ACTIVITY SUBSIDES THROUGH THE EVENING ALL EYES WILL TURN TO ANOTHER...EVEN STRONGER DISTURBANCE OVER NORTHERN COLORADO. THIS DISTURBANCE WILL RACE NORTHEAST THROUGH THE EVENING HOURS AND MAY TOUCH OF A ROUND OF SEVERE WEATHER OVER PORTIONS OF CENTRAL SOUTH DAKOTA INTO SOUTHEASTERN NORTH DAKOTA. A SEVERE THUNDERSTORM WATCH IS CURRENTLY IN EFFECT UNTIL 1100 PM FOR RANSOM AND SARGENT COUNTIES. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. BRAZZELL
In the hours before
Special weather statement, May 4, 1:30 PM CDT, 50 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-042300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 130 PM CDT TUE MAY 4 1999 ...SEVERE THUNDERSTORMS ARE POSSIBLE OVER EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA FOR THE REST OF THIS AFTERNOON AND EVENING... .SYNOPSIS...LOW PRESSURE WILL REMAIN NEARLY STATIONARY NEAR THE SOUTH DAKOTA/NORTH DAKOTA THROUGH THIS EVENING. SOUTHEAST WINDS WILL TRANSPORT WARM...MOIST AND UNSTABLE AIR INTO THE AREA. THUNDERSTORMS DEVELOPING IN SOUTH DAKOTA WILL MOVE NORTHWEST THROUGH THE AFTERNOON AS JET STREAM ENERGY COMBINES WITH AN IMPRESSIVE MOISTURE PLUME. THE AMPLE MOISTURE WILL COMBINE WITH THE STRONG DYNAMICS TO PRODUCE THE POSSILITY OF SEVERE THUNDERSTORMS. .AREA OF CONCERN...THE BEST CHANCE FOR ISOLATED SEVERE THUNDERSTORMS WILL BE IN THE ZONE FROM DEVILS LAKE EASTWARD THROUGH GRAND FORKS AND SOUTHEASTWARD THROUGH THE LAKES COUNTRY OF MINNESOTA. .TIME...THE SEVERE THREAT WILL BE BETWEEN 1 AND 9 PM. .TYPE OF HAZARD...THE MAIN THREAT FROM THUNDERSTORMS WILL BE HAIL UP TO ONE INCH DIAMETER AND ISOLATED DOWNBURST WINDS. SOROKA
Special weather statement, May 4, 1:30 PM CDT, 50 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-042300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 130 PM CDT TUE MAY 4 1999 ...SEVERE THUNDERSTORMS ARE POSSIBLE OVER EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA FOR THE REST OF THIS AFTERNOON AND EVENING... .SYNOPSIS...LOW PRESSURE WILL REMAIN NEARLY STATIONARY NEAR THE SOUTH DAKOTA/NORTH DAKOTA THROUGH THIS EVENING. SOUTHEAST WINDS WILL TRANSPORT WARM...MOIST AND UNSTABLE AIR INTO THE AREA. THUNDERSTORMS DEVELOPING IN SOUTH DAKOTA WILL MOVE NORTHWEST THROUGH THE AFTERNOON AS JET STREAM ENERGY COMBINES WITH AN IMPRESSIVE MOISTURE PLUME. THE AMPLE MOISTURE WILL COMBINE WITH THE STRONG DYNAMICS TO PRODUCE THE POSSILITY OF SEVERE THUNDERSTORMS. .AREA OF CONCERN...THE BEST CHANCE FOR ISOLATED SEVERE THUNDERSTORMS WILL BE IN THE ZONE FROM DEVILS LAKE EASTWARD THROUGH GRAND FORKS AND SOUTHEASTWARD THROUGH THE LAKES COUNTRY OF MINNESOTA. .TIME...THE SEVERE THREAT WILL BE BETWEEN 1 AND 9 PM. .TYPE OF HAZARD...THE MAIN THREAT FROM THUNDERSTORMS WILL BE HAIL UP TO ONE INCH DIAMETER AND ISOLATED DOWNBURST WINDS. SOROKA
Special weather statement, May 4, 1:31 PM CDT, 49 minutes before
...SEVERE THUNDERSTORMS ARE POSSIBLE OVER EASTERN NORTH DAKOTA AND .SYNOPSIS...LOW PRESSURE WILL REMAIN NEARLY STATIONARY NEAR THE SOUTH .AREA OF CONCERN...THE BEST CHANCE FOR ISOLATED SEVERE THUNDERSTORMS .TIME...THE SEVERE THREAT WILL BE BETWEEN 1 AND 9 PM. .TYPE OF HAZARD...THE MAIN THREAT FROM THUNDERSTORMS WILL BE HAIL UP TO
Special weather statement, May 4, 1:32 PM CDT, 48 minutes before
...SEVERE THUNDERSTORMS ARE POSSIBLE OVER EASTERN NORTH DAKOTA AND .SYNOPSIS...LOW PRESSURE WILL REMAIN NEARLY STATIONARY NEAR THE SOUTH .AREA OF CONCERN...THE BEST CHANCE FOR ISOLATED SEVERE THUNDERSTORMS .TIME...THE SEVERE THREAT WILL BE BETWEEN 1 AND 9 PM. .TYPE OF HAZARD...THE MAIN THREAT FROM THUNDERSTORMS WILL BE HAIL UP TO
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:40 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 50 min |
| May 3, 9:50 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 35 min |
| May 4, 2:41 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 34 min |
| May 3, 7:08 PM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods | 32 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1999Every severe thunderstorm warning in 1999
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.