Alert archive / North Dakota / Tornado Warnings in 1998
Tornado Warning 22, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 26, 1998, 6:37 PM CDT for Cavalier County, Pembina County, North Dakota. It was in force for 33 min. 5 reports 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 26, 1998, 6:37 PM CDT (23:37 UTC)
- Expired
- Aug 26, 1998, 7:10 PM CDT
- In force
- 33 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Cavalier County, ND, Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 147 km from the middle of the area, began a volume at 23:36 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 26, 6:50 PM CDT | Tornado F0 | Hensel, ND | |
| Aug 26, 7:06 PM CDT | Hail 1.75 | Cavalier, ND | |
| Aug 26, 7:15 PM CDT | Hail 1 | Akra, ND | |
| Aug 26, 7:20 PM CDT | Hail 0.75 | Cavalier, ND | |
| Aug 26, 7:20 PM CDT | Hail 1.5 | Cavalier, 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.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.6 hours before the alert went out and 300 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
- 611 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
586 WFUS1 KFAR 262339 RRA TORFAR NDC019-067-270010- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 637 PM CDT WED AUG 26 1998 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... EXTREME EASTERN CAVALIER COUNTY IN NORTHEASTERN NORTH DAKOTA PEMBINA COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 710 PM CDT * AT 637 PM CDT...RADAR INDICATED A TORNADO 15 MILES SOUTH OF WALHALLA ...OR ABOUT 20 MILES NORTHEAST OF LANGDON. MOVEMENT WAS TOWARDS THE NORTHEAST 15 MPH. * THE TORNADO WILL BE NEAR... BACKOO AT 700 PM CDT THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. KELLENBENZ
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 12:10 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 35 min |
| Aug 26, 12:51 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey | 34 min |
| Aug 26, 3:53 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 32 min |
| Aug 26, 4:01 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 4:30 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 35 min |
| Aug 26, 5:01 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 6:08 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 32 min |
Nearby
Tornado Warnings in North Dakota, 1998Every tornado warning in 1998Tornadoes in 1998
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.