Alert archive / North Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 64, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 1, 1987, 3:15 AM CDT for Richland County, North Dakota; Wilkin County, Minnesota. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- Aug 1, 1987, 3:15 AM CDT (08:15 UTC)
- Expired
- Aug 1, 1987, 4:05 AM CDT
- In force
- 50 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Wilkin County, MN, Richland County, ND
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
Aberdeen, SD (KHON), launched 00:00Z, 8.3 hours before the alert went out and 205 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
- 2890 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 2250 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 010815 SVRFAR NDC077-MNC167-010905- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FARGO ND 315 AM CDT SAT AUG 1 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 405 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST NORTH DAKOTA...EASTERN RICHLAND WEST CENTRAL MINNESOTA...WILKIN TO INCLUDE WAHPETON/BRECKINRIDGE AND ABERCROMBIE. AT 300 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST OF WAHPETON MOVING TOWARD THE NORTHEAST AT 30 MILES AN HOUR. . AT 300 AM CDT 65 MILE AN HOUR WINDS WERE REPORTED AT THE MORTON WEIGH SCALE AT MORTON. 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. IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND LIGHTNING. REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS... ST AY AWAY FROM HIGH OBJECTS. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES AND ELECTRICAL EQUIPMENT. 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
Special weather statement, Aug 1, 12:52 AM CDT, 2 hours 23 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, 1 hour 27 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
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 2:02 AM CDT | Tornado Warning | FGF | Ransom, Richland, Sargent | 58 min |
| Aug 1, 4:58 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 32 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1987Severe 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.