Alert archive / North Dakota / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 139, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 20, 1996, 11:35 PM CDT for Benson County, North Dakota. It was in force for 40 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 20, 1996, 11:35 PM CDT (04:35 UTC)
- Expired
- Aug 21, 1996, 12:15 AM CDT
- In force
- 40 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Benson County, ND
The radar
The Minot AFB radar (KMBX), 117 km from the middle of the area, began a volume at 04:36 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 21, 12:00 AM CDT | Hail 0.75 | Devils Lake, 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, 4.6 hours before the alert went out and 176 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
- 1259 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 2050 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 210436 SVRFAR NDC005-210515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA ND 1135 PM CDT TUE AUG 20 1996 THE NATIONAL WEATHER SERVICE IN EASTERN NORTH DAKOTA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST NORTH DAKOTA ...BENSON COUNTY AT 1137 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 40 MILES WEST OF DEVILS LAKE...OR BETWEEN ESMOND AND KNOX. MOVEMENT WAS TO THE NORTHEAST AT 25 MPH. THE STORM WILL REACH THE TOWN OF LEEDS AROUND 1210 AM WEDNESDAY. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. ARMSTRONG
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:30 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 30 min |
| Aug 21, 2:52 AM CDT | Severe Thunderstorm Warning | FGF | Walsh | 38 min |
| Aug 21, 4:11 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Towner | 34 min |
| Aug 21, 4:21 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 39 min |
| Aug 21, 4:46 AM CDT | Severe Thunderstorm Warning | FGF | Pembina | 29 min |
| Aug 21, 4:49 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 41 min |
| Aug 21, 10:59 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 31 min |
| Aug 21, 6:12 PM CDT | Severe Thunderstorm Warning | FGF | Richland | 48 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1996Every severe thunderstorm warning in 1996
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.