Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 7, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at May 3, 1999, 9:50 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 3, 1999, 9:50 PM CDT (02:50 UTC)
- Expired
- May 3, 1999, 10:25 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 00:00Z, 2.8 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
- 55 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1997 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 040251 SVRFAR NDC095-040325- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 950 PM CDT MON MAY 3 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... TOWNER COUNTY IN NORTH CENTRAL NORTH DAKOTA * UNTIL 1025 PM CDT * AT 948 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES WEST OF LANGDON OR 3 MILES SOUTH OF ROCK LAKE... MOVING NORTH AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE ROCK LAKE AT 1055 PM CDT DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL A PPLIANCES. BRAZZELL
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 3, 8:55 PM CDT, 55 minutes earlier.
Area forecast discussion, May 3, 8:55 PM CDT, 55 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 855 PM CDT MON MAY 3 1999 UPDATE PLANNED. ONLY MINOR TWEEKS NEEDED. THUNDERSTORM ACTIVITY HAS DIMINISHED IN MN ZONES AS UPPER WV LIFTS INTO CANADA. SYSTEM IN WRN NE LIFTING INTO WRN SD WITH GOOD DIFFLUENCE AHEAD...THROUGH ERN ND. TSTM ACTIVITY LIKELY TO INCREASE OVERNIGHT FM ND INTO NWRN MN AS MAIN WAVE APPROACHES. SFC PRESS GRADIENT REMAINS HIGH OVERNIGHT SO WILL NOT BACK WINDS OFF TO FAR. LOW TEMPS APPEAR OKAY. .FGF...SVR TSTM WATCH ND49-52 TIL 04Z. GUST
Hazardous weather outlook, May 3, 6:45 PM CDT, 3 hours 5 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 3, 6:45 PM CDT, 3 hours 5 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
Special weather statement, May 3, 6:45 PM CDT, 3 hours 5 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
Special weather statement, May 3, 8:22 PM CDT, 1 hour 28 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-040600- 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 THES*E STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. BRAZZELL
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 4, 2:20 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 35 min |
| May 4, 2:41 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 34 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.