Alert archive / North Dakota / Tornado Warnings in 1998
Tornado Warning 23, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 26, 1998, 7:49 PM CDT for Pembina County, Walsh County, North Dakota. It was in force for 31 min. 2 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, 7:49 PM CDT (00:49 UTC)
- Expired
- Aug 26, 1998, 8:20 PM CDT
- In force
- 31 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Pembina County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 118 km from the middle of the area, began a volume at 00:52 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, 7:55 PM CDT | Hail 2 | St Thomas, ND | The hail lasted for 20 minutes and covered the ground. |
| Aug 26, 8:05 PM CDT | Hail 1.75 | St Thomas, 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 00:00Z, 0.8 hours before the alert went out and 304 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
- 815 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 1685 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
971 WFUS1 KFAR 270051 RRA TORFAR NDC067-099-270120- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 749 PM CDT WED AUG 26 1998 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN PEMBINA COUNTY IN NORTHEASTERN NORTH DAKOTA NORTHERN WALSH COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 820 PM CDT * AT 747 PM CDT...RADAR INDICATED A TORNADO NEAR HOOPLE ALONG THE PEMBINA AND WALSH COUNTY LINE...OR 15 MILES NORTHWEST OF GRAFTON. MOVEMENT TO THE SOUTHEAST AT 15 MPH. * THE TORNADO WILL BE NEAR... HOOPLE AT 755 PM CDT NASH AT 810 PM CDT NEAR GRAFTON AT 820 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, 7:05 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 35 min |
| Aug 26, 7:36 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 8:17 PM CDT | Tornado Warning | FGF | Pembina, Walsh | 33 min |
| Aug 26, 8:48 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 32 min |
| Aug 26, 9:17 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 33 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.