Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 65, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 1, 1987, 4:58 AM CDT for Beltrami County, Minnesota. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Aug 1, 1987, 4:58 AM CDT (09:58 UTC)
- Expired
- Aug 1, 1987, 5:30 AM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Beltrami 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 00:00Z, 10.0 hours before the alert went out and 138 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
- 10 J/kg
- Mixed-layer CIN
- -505 J/kg
- Mixed-layer LCL
- 958 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 135 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 KINL 011004 SVRINL MNC007-011030- BULLETIN-IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN 458 AM CDT SAT AUG 1 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF.. NORTH CENTRAL MINNESOTA...EASTERN HALF OF BELTRAMI...INCLUDING THE TOWN OF PENNINGTON... AT 457 AM CDT...WINDS WERE ESTIMATED AT 75 MILES AN HOUR NEAR LAKE ANDRUSIA IN SOUTHEAST BELTRAMI COUNTY...ABOUT 10 MILES EAST OF BEMIDJI MINNESOTA. REMEMBER...SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MILES AN HOUR..DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. ALSO..SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A SAFE PLACE IF ONE IS SPOTTED. JOSEPHS
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 1, 12:52 AM CDT, 4 hours 6 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 1240 AM CDT SAT AUG 01 1987 ...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN MOVING INTO SOUTHEAST NORTH DAKOTA... AT 1228 AM CDT...AN AREA OF INTENSE THUNDERSTORMS..SOME WITH VERY HEAVY RAIN WAS MOVING INTO PART OF SOUTHEAST NORTH DAKOTA. THIS AREA WAS ABOUT 25 MILES WIDE THAT EXTENED FROM 30 MILES NORTHWEST OF FARGO TO ABOUT 30 MILES WEST OF ABERDEEN IN NORTHEAST SOUTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE OVER LA MOURE AND DICKEY COUNTIES OF SOUTHEAST NORTH DAKOTA. MOVEMENT WAS GENERALLY EAST AT 30 MILES AN HOUR AND THESE STORMS SHOULD ACROSS LA MOURE AND DICKEY COUNTIES AND INTO RANSOM AND SARGENT COUNTIES BY 130 AM. PERSONS IN THE CITIES OF LA MOURE..OAKES..ELLENDALE AND LISBON SHOULD BE AWARE OF THESE INTENSE THUNDERSTORMS. THESE STORMS ARE CAPABLE OF PRODUCING SMALL HAIL..VERY HEAVY RAIN..STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. OTHER STRONG THUNDERSTORMS..SOME WITH VERY HEAVY RAIN HAD MOVED INTO SOUTHERN BARNES AND EXTREME WESTERN CASS COUNTIES OF SOUTHEAST NORTH DAKOTA. ONE STRONG THUNDERSTORM WAS 15 TO 20 MILES SOUTH OF VALLEY CITY AND ANOTHER ABOUT 30 MILES WEST OF FARGO IN EXTREME WESTERN CASS COUNTY. PERSONS IN THE VICINITY OF ENDERLIN AND CASSELTON MAY SEE THIS THUNDERSTORM ACTIVITY BY 130 AM. IF THESE THUNDERSTORMS CONTINUE ON THERE PRESENT MOVEMENT THEY SHOULD BE ON THE WESTERN EDGE OF FARGO/WEST FARGO SOMETIME AFTER 2 AM. REMEMBER...THESE THUNDERSTORMS HAVE THE POTENIAL OF PRODUCING VERY HEAVY RAIN..DANGEROUS LIGHTNING..SMALL HAIL AND STRONG GUSTY WINDS. SPIES
Special weather statement, Aug 1, 1:48 AM CDT, 3 hours 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 140 AM CDT SAT AUG 01 1987 ...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUE IN SOUTHEAST NORTH DAKOTA AND NORTHEAST SOUTH DAKOTA... AT 129 AM CDT...AN INTENSE THUNDERSTORM..WITH VERY HEAVY RAIN HAD MOVED INTO EXTREME NORTHWEST RICHLAND COUNTY OF SOUTHEAST NORTH DAKOTA OR ABOUT 10 MILES SOUTHWEST OF THE CITY OF KINDRED. THIS STORM SHOULD MOVE INTO THE VICINTIY OF KINDRED AND ACROSS EXTREME NORTHERN RICHLAND COUNTY AND INTO SOUTHERN CLAY COUNTY OF WEST CENTRAL MINNESOTA BY 230 AM. OTHER INTENSE THUNDERSTORMS..WITH VERY HEAVY RAIN WERE OCCURRING OVER SOUTHEAST NORTH DAKOTA AND NORTHEAST SOUTH DAKOTA. THIS AREA OF INTENSE THUNDERSTORMS WAS ABOUT 20 MILES WIDE THAT EXTENDED FROM THE SOUTHWEST PART OF CASS COUNTY IN SOUTHEAST NORTH DAKOTA TO THE VICINITY OF ABERDEEN IN NORTHEAST SOUTH DAKOTA. ONE INTENSE STORM WAS ON THE NORTH AND SOUTH DAKOTA STATE LINE JUST SOUTHEAST OF ELLENDALE. ANOTHER WAS WAS ABOUT 10 MILES NORTH OF ABERDEEN IN CENTRAL BROWN COUNTY OF NORTHEAST SOUTH DAKOTA. REMEMBER...THESE THUNDERSTORMS HAVE THE POTENIAL OF PRODUCING SEVERE WEATHER..WHICH INCLUDES LARGE HAIL..DAMAGING WINDS..DANGEROUS LIGHTNING AND VERY HEAVY RAIN. PERSONS IN SOUTHEAST NORTH DAKOTA..NORTHEAST SOUTH DAKOTA AND PARTS OF WEST CENTRAL MINNESOTA SHOULD STAY ALERT FOR POSSIBLY SEVERE WEATHER OVER THE NEXT FEW HOURS. SPIES
Special weather statement, Aug 1, 4:40 AM CDT, 18 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 440 AM CDT SAT AUG 01 1987 AT 426 AM CDT...AN INTENSE THUNDERSTORM..WITH VERY HEAVY RAIN HAD MOVED INTO EXTREME SOUTHERN BELTRAMI COUNTY OF NORTH CENTRAL MINNESOTA IN THE VICINITY OF BEMIDJI. THIS INTENSE THUNDERSTORM WAS MOVING NORTHEAST AT 40 MILES AN HOUR AND PERSONS OVER SOUTHERN BELTRAMI COUNTY SHOULD BE AWARE OF THIS STORM. DANGEROUS LIGHTNING.. VERY HEAVY RAIN..LARGE HAIL AND STRONG GUSTY WINDS MAY ACCOMPANY THIS STORM AS IT MOVES NORTHEAST. OTHER SCATTERED SHOWERS AND THUNDERSTORMS..A FEW WITH HEAVY RAIN WERE OCCURRING OVER NORTHWEST AND WEST CENTRAL MINNESOTA..EASTERN NORTH DAKOTA AND NORTHEAST SOUTH DAKOTA. THE THUNDERSTORMS WITH THE HEAVY RAIN WERE OVER BECKER AND NORTHERN OTTER TAIL COUNTIES OF NORTHWEST AND WEST CENTRAL MINNESOTA MAINLY FROM DETROIT LAKES TO NEAR BATTLE LAKE. MOVEMENT WAS ALSO NORTHEAST AT 40 MILES AN HOUR. MOSLT OF THE ACTIVITY OVER EASTERN NORTH DAKOTA AND NORTHEAST SOUTH DAKOTA WERE GENERALLY LIGHT SHOWERS. SPIES
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 3:15 AM CDT | Severe Thunderstorm Warning | FGF | Wilkin | 50 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.