Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 21, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 3, 1999, 9:20 PM CDT for Griggs 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
- Jun 3, 1999, 9:20 PM CDT (02:20 UTC)
- Expired
- Jun 3, 1999, 9:55 PM CDT
- In force
- 35 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Griggs County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 69 km from the middle of the area, began a volume at 02:22 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.
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 3, 6:00 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 3, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.3 hours before the alert went out and 201 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
- 59 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1938 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 270 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 040220 RRA SVRFAR NDC039-040255- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 920 PM CDT THU JUN 3 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GRIGGS COUNTY IN SOUTHEASTERN NORTH DAKOTA * UNTIL 955 PM CDT * AT 918 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 43 MILES SOUTHEAST OF DEVILS LAKE OR 3 MILES NORTHEAST OF BINFORD... MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN IN RURAL AREAS NORTH AND WEST OF BINFORD. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING. VOELKER
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 7:25 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 35 min |
| Jun 3, 8:23 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 32 min |
| Jun 3, 8:46 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 34 min |
| Jun 3, 8:54 PM CDT | Severe Thunderstorm Warning | FGF | Eddy, Nelson | 36 min |
| Jun 3, 9:27 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 33 min |
| Jun 3, 9:53 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 32 min |
| Jun 4, 1:11 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Steele, Traill | 29 min |
| Jun 4, 4:04 AM CDT | Severe Thunderstorm Warning | FGF | Nelson, Walsh | 31 min |
| Jun 4, 4:04 AM CDT | Severe Thunderstorm Warning | FGF | Pembina | 31 min |
| Jun 4, 4:43 AM CDT | Severe Thunderstorm Warning | FGF | Walsh | 32 min |
| Jun 4, 5:14 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 31 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; radar from the NEXRAD Level II archive.