Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 82, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 15, 1987, 5:06 PM CDT for Mahnomen County, Norman County, Minnesota. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Aug 15, 1987, 5:06 PM CDT (22:06 UTC)
- Expired
- Aug 15, 1987, 6:00 PM CDT
- In force
- 54 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Mahnomen County, MN, Norman County, MN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 10.1 hours before the alert went out and 252 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 940 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 72 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 152206 SVRFAR MNC027-087-107-152300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FARGO ND 506 PM CDT SAT AUG 15 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHWEST MINNESOTA...NORTHERN CLAY...MAHNOMEN AND NORMAN AT 500PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTH OF THE FARGO/MOORHEAD AREA NEAR GEORGETOWN MINNESOTA MOVING EAST AT 35 MILES AN HOUR. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND/OR HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING... AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. THIS STORM WILL AFFECT THE CITIES OF TWIN VALLEY AND THE ULEN/FELTON LOCALIZED FLOODING IS LIKELY DUE TO THE TORRENTIAL RAINS ASSOCIATED WITH THESE STORMS. EWENS
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 15, 12:50 PM CDT, 4 hours 16 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 1237 PM CDT SAT AUG 15 1987 ...STRONG THUNDERSTORMS FIRE-UP OVER NORTHWEST MINNESOTA... AT 1228 PM CDT SEVERAL STRONG THUNDERSTORMS WERE OVER NORTHWEST MINNESOTA. ONE STRONG STORM WAS JUST WEST OF THE LOWER RED LAKE AND SHOULD MOVE OVER THE NORTHWEST CORNER OF THE LAKE AND ON ACROSS THE UPPER RED LAKE BY 130 PM. ANOTHER CLUSTER OF STRONG STORMS WAS IN THE FOSSTON AREA. THESE STORMS PRODUCE MARBLE SIZE HAIL..VERY HEAVY RAIN AND STRONG..GUSTY WIND IN FOSSTON. THESE STORM SHOULD MOVE TO THE WEST OF THE LOWER RED LAKE BY 130 PM. ANOTHER CLUSTER OF STRONG STORMS WAS IN THE SHELLY/HALSTAD AREA. THESE STORMS SHOULD MOVE INTO THE FOSSTON AREA BY 130 PM. OTHER SHOWERS AND THUNDERSTORMS REACHED FROM 30 MILES SOUTH OF FARGO NORTH DAKOTA TO THE UPPER RED LAKE IN NORTHCENTRAL MINNESOTA. ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WAS DEVELOPING OVER CENTRAL AND NORTH CENTRAL NORTH DAKOTA TO THE WEST OF DEVILS LAKE. MOVEMENT OF ALL OF THESE STORMS AND SHOWERS WAS EAST AT 35 MILES AN HOUR. PEOPLE IN THE PATH OF THESE STORMS SHOULD STAY ABREAST OF THE WEATHER CONDITIONS AND BE PREPARED TO GO TO A SAFE SHELTER..IF THE NEED ARISES. BENNETT
Local storm report, Aug 15, 12:55 PM CDT, 4 hours 11 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1253 PM CDT SAT AUG 15 1987
TIME EVENT
1232PM POLK CTY MN SHERIFF REPORTED STRONG WIND AND MARBLE SIZE HAIL
IN THE CITY OF FOSSTON MN.
1233 RADIO STATION IN FOSSTON MN REPORTED VERY HEAVY RAIN..SMALL
HAIL.The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 1:50 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 60 min |
| Aug 15, 3:49 PM CDT | Tornado Warning | FGF | Wilkin | 41 min |
| Aug 15, 4:25 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Otter Tail | 65 min |
| Aug 15, 5:06 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 54 min |
| Aug 15, 5:29 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail, Wadena | 61 min |
| Aug 15, 5:29 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 61 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive.