Alert archive / North Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 45, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 1987, 9:50 PM CDT for Grand Forks County, Traill County, North Dakota. It was in force for 55 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
- Jul 21, 1987, 9:50 PM CDT (02:50 UTC)
- Expired
- Jul 21, 1987, 10:45 PM CDT
- In force
- 55 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Grand Forks County, ND, Traill 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 |
|---|---|---|---|
| Jul 21, 10:30 PM CDT | Thunderstorm Wind 52 | Traill, 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, 2.8 hours before the alert went out and 276 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
- 448 J/kg
- Mixed-layer CIN
- -370 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 454 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 25.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 220250 SVRFAR NDC035-039-063-091-097-220345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FARGO ND 950 PM CDT TUE JUL 21 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL NORTH DAKOTA...SOUTHERN GRAND FORKS...NORTHERN GRIGGS... SOUTHEAST NELSON...NORTHERN STEELE AND NORTHERN TRAILL TO INCLUDE ANETA...NORTHWOOD AND HATTON. AT 940 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES WEST- SOUTHWEST OF GRAND FORKS MOVING TOWARD THE EAST AT 35 TO 40 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. 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. VOELKER
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
Local storm report, Jul 21, 8:18 PM CDT, 1 hour 32 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
800PM CDT WED JUL 21 1987
TIME EVENT
502 PM CDT SPOTTER IN HOPE NORTH DAKOTA IN STEELE COUNTY REPORTED HEAVY
RAIN AND HAIL UP TO 2 INCHES.
505 PM CDT SPOTTER REPORTED FUNNEL CLOUD 10 MILES WEST OF HOPE NORTH
DAKOTA IN STEELE COUNTY.
505 PM CDT SPOTTER REPORTED MARBLE-GOLFBALL SIZED HAIL 4 AND 9 MILES
WEST OF COOPERSTOWN NORTH DAKOTA IN GRIGGS COUNTY.
530 PM CDT GOLFBALL TO BASEBALL SIZE HAIL AT CLIFFORD NORTH DAKOTA
IN TRAILL COUNTY BY LAW ENFORCEMENT.
555 PM CDT STATE RADIO RELAYS LAW ENFORCEMENT REPORT OF TORNADO
TOUCHDOWN AT BLANCHARD NORTH DAKOTA IN TRAIL COUNTY.
.
620 PM CDT 1 MILES WEST, 11/2 MILES NORTH OF PILLSBURY NORTH DAKOTA
SPOTTER REPORTED 1 INCH OF RAIN IN 15 MINUTES AND GOLFBALL
SIZE HAIL...BARNES COUNTY
VOELKERLocal storm report, Jul 21, 8:31 PM CDT, 1 hour 19 minutes before
STORM REPORTS...CORRECTED FOR DAY
NATIONAL WEATHER SERVICE FARGO ND
800PM CDT TUE JUL 21 1987
TIME EVENT
502 PM CDT SPOTTER IN HOPE NORTH DAKOTA IN STEELE COUNTY REPORTED HEAVY
RAIN AND HAIL UP TO 2 INCHES.
505 PM CDT SPOTTER REPORTED FUNNEL CLOUD 10 MILES WEST OF HOPE NORTH
DAKOTA IN STEELE COUNTY.
505 PM CDT SPOTTER REPORTED MARBLE-GOLFBALL SIZED HAIL 4 AND 9 MILES
WEST OF COOPERSTOWN NORTH DAKOTA IN GRIGGS COUNTY.
530 PM CDT GOLFBALL TO BASEBALL SIZE HAIL AT CLIFFORD NORTH DAKOTA
IN TRAILL COUNTY BY LAW ENFORCEMENT.
555 PM CDT STATE RADIO RELAYS LAW ENFORCEMENT REPORT OF TORNADO
TOUCHDOWN AT BLANCHARD NORTH DAKOTA IN TRAIL COUNTY.
.
620 PM CDT 1 MILES WEST, 11/2 MILES NORTH OF PILLSBURY NORTH DAKOTA
SPOTTER REPORTED 1 INCH OF RAIN IN 15 MINUTES AND GOLFBALL
SIZE HAIL...BARNES COUNTY
VOELKERLocal storm report, Jul 21, 9:26 PM CDT, 24 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
930 PM CDT TUE JUL 21 1987
TIME EVENT
615 PM CDT WEATHER MODIFICATION UNIT REPORTS GOLFBALL SIZE HAIL AND
LARGER 10 SOUTHEAST OF COOPERSTOWN NORTH DAKOTA IN GRIGGS
COUNTY
650 PM CDT TORNADO 2 WEST AND 7 NORTH OF ARGUSVILLE NORTH DAKOTA IN
CASS COUNTY BY LAW ENFORCEMENT.
705 PM CDT GOLFBALL SIZE HAIL AND LARGER 2 MILES SOUTHWEST OF COLGATE
NORTH DAKOTA IN STEELE COUNTY.
730 PM CDT LAW ENFORCEMENT REPORT TORNADO AT ANETA NORTH DAKOTA IN
NELSON COUNTY.
736 PM CDT LAW ENFORCEMENT REPORT OF POSSIBLE TORNADO 10 MILES NORTH
AND 5 MILES WEST OF COOPERSTOWN NORTH DAKOTA IN GRIGGS
COUNTY.
740 PM CDT 1.55 INCHES OF RAIN AND PEA SIZED HAIL IN WEST FARGO BY
OFF DUTY MET TECH
745 PM CDT MINNKOTA POWER REPORT TORNADO SOUTH OF ANETA NORTH DAKOTA.
4 MILES SOUTH OF ANETA A HOUSE MOVED OFF OF THE FOUNDATION.
745 PM CDT WEATHER MODIFICATION REPORT UPROOTED TREES 8 MILES NORTH OF
COOPERSTOWN.
745 PM CDT AMBULANCE PERSONEL REPORT TREE AND BUILDING DAMAGE AT
FINLEY NORTH DAKOTA IN STEELE COUNTY. POSSIBLE TORNADO.
755 PM CDT TORNADO REPORT RELAYED BY STATE RADIO 3 MILES WEST 1/2 MILE
SOUTH OF SHARON NORTH DAKOTA IN STEELE COUNTY. 3 GRAINERY
BUILDINGS DESTROYED.
800 PM CDT WEATHER MODIFICATION REPORTED A TORNADO 4 MILES EAST AND 5
MILES NORTH OF COOPERSTOWN NORTH DAKOTA IN GRIGGS COUNTY
DESTROYED A GRAINERY.
726 PM CDT FUNNEL CLOUDS REPORTED BY CLAY COUNTY SHERIFF OFFICE OVER
GLYNDON MINNESOTA.
813 PM CDT CLAY COUNTY SHERIFF REPORTED FUNNEL CLOUDS SOUTHEAST OF
BARNESVILLE MINNESOTA.
VOELKERThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:02 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 58 min |
| Jul 21, 7:14 PM CDT | Tornado Warning | FGF | Nelson | 61 min |
| Jul 21, 7:41 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Steele | 49 min |
| Jul 21, 7:41 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 49 min |
| Jul 21, 8:38 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 62 min |
| Jul 21, 8:49 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 56 min |
| Jul 21, 9:50 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Nelson, Steele | 55 min |
| Jul 21, 10:44 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele, Traill | 61 min |
| Jul 21, 11:53 PM CDT | Severe Thunderstorm Warning | FGF | Steele, Traill | 52 min |
| Jul 21, 11:53 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 52 min |
| Jul 22, 12:47 AM CDT | Severe Thunderstorm Warning | FGF | Steele, Traill | 58 min |
| Jul 22, 1:53 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 52 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.