Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 252, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 22, 1999, 6:13 PM CDT for Steele County, North Dakota. It was in force for 32 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 22, 1999, 6:13 PM CDT (23:13 UTC)
- Expired
- Aug 22, 1999, 6:45 PM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 31 km from the middle of the area, began a volume at 23:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 22, 6:15 PM CDT | Hail 1.25 | Finley, ND | The large hail broke the windows in a pickup truck. |
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.
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 22, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.2 hours before the alert went out and 238 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
- 950 J/kg
- Mixed-layer CIN
- -206 J/kg
- Mixed-layer LCL
- 1371 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 311 m²/s²
- 0-3 km storm-relative helicity
- 274 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 222314 RRA SVRFAR NDC091-222345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 613 PM CDT SUN AUG 22 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... STEELE COUNTY IN SOUTHEASTERN NORTH DAKOTA * UNTIL 645 PM CDT * AT 609 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORMS 40 MILES SOUTHWEST OF GRAND FORKS. ONE STORM WAS 8 MILES EAST OF FINLEY... A SECOND STORM WAS 2 MILES SOUTHWEST OF SHARON...MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL PASS NEAR SHARON BY 620 PM CDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING. $$ KENNEDY
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 4:51 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 34 min |
| Aug 22, 5:09 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 31 min |
| Aug 22, 5:28 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 32 min |
| Aug 22, 5:35 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 35 min |
| Aug 22, 6:04 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 31 min |
| Aug 22, 6:23 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 32 min |
| Aug 22, 6:40 PM CDT | Severe Thunderstorm Warning | FGF | Steele | 15 min |
| Aug 22, 6:55 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 35 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.