Alert archive / North Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 75, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 5, 1987, 8:32 PM CDT for Steele County, North Dakota. It was in force for 58 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 5, 1987, 8:32 PM CDT (01:32 UTC)
- Expired
- Aug 5, 1987, 9:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Steele County, ND
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 8:40 PM CDT | Hail 0.75 | Steele, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.5 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
- 282 J/kg
- Mixed-layer CIN
- -257 J/kg
- Mixed-layer LCL
- 2542 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -78 m²/s²
- 0-3 km storm-relative helicity
- -33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 060132 SVRFAR NDC091-060230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FARGO ND 832 PM CDT WED AUG 5 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF EAST CENTRAL NORTH DAKOTA...STEELE THIS INCLUDES THE TOWNS OF HOPE AND FINLEY NORTH DAKOTA. AT 825 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 45 MILES SOUTHWEST OF GRAND FORKS NORTH DAKOTA BETWEEN FINLEY AND HOPE NORTH DAKOTA. AT 825 PM CDT MARBLE SIZED AND LARGER SIZED HAIL WAS REPORTED 8 MILES SOUTH OF FINLEY NORTH DAKOTA. IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A PLACE OF SAFETY IMMEDIATELY. REPORT ALL SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT AGENCY AFTER THE STORM PASSES. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS... STAY AWAY FROM HIGH OBJECTS. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROMz WINDOWS AND DOORS AND AVOID USING TELEPHONES AND ELECTRICAL EQUIPMENT. ANDERSEN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 7:00 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 60 min |
| Aug 5, 7:05 PM CDT | Tornado Warning | FGF | Nelson | 60 min |
| Aug 5, 7:14 PM CDT | Severe Thunderstorm Warning | FGF | Steele, Traill | 56 min |
| Aug 5, 7:39 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 66 min |
| Aug 5, 7:49 PM CDT | Tornado Warning | FGF | Grand Forks | 56 min |
| Aug 5, 8:05 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Nelson | 55 min |
| Aug 5, 8:50 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 55 min |
| Aug 5, 8:57 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 63 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1987Every severe thunderstorm warning in 1987
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.