Alert archive / Minnesota / Tornado Warnings in 1986
Tornado Warning 11, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 26, 1986, 11:33 PM CDT for Stevens County, Minnesota. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jul 26, 1986, 11:33 PM CDT (04:33 UTC)
- Expired
- Jul 27, 1986, 12:15 AM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Stevens 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
Aberdeen, SD (KHON), launched 00:00Z, 4.6 hours before the alert went out and 203 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
- 1680 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1819 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 270433 TORFAR MNC149-270515- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE FARGO ND 1133 PM CDT SAT JUL 26 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL MINNESOTA...STEVENS AT 1127 AM CDT A TORNADO WAS REPORTED BY LAW ENFORCEMENT OFFICIALS 5 MILES WEST OF CHOKIO MINNESOTA. THIS WARNING ENCLUDES THE TOWNS OF CHOKIO AND MORRIS MINNESOTA. THIS STORM IS ACCOMPANIED BY INTENSE LIGHTNING..LARGE HAIL..AND DANGEROUS STRAIGHT LINE WINDS. THIS STORM MAY ALSO CAUSE FLOODING OF SMALL STREAMS AND UNDERPASSES. IF A TORNADO IS APPROACHING GET INTO A BASEMENT...IF NO BASEMENT IS AVAILABLE...GET INTO THE INNERMOST HALLWAY...STAY AWAY FROM WINDOWS. IF CAUGHT OUTSIDE GET INTO A DITCH...GULLY...RAVINE...OR EVEN A LOW LYING SPOT ON THE GROUND. PROTECT YOUR HEAD. ABANDON CARS AND MOBILE HOMES. IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY.
What forecasters said that day
The local office's own words before this tornado 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 26, 6:45 PM CDT, 4 hours 48 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
645 PM CDT SAT JUL 26 1986
TIME EVENT
555 PM MCHENRY ND COOP OBSERVER RPTD 30 MPH WIND...VRY HVY RAIN AND
NO HAIL.
620 PM CAVALIER 7NW ND RPTD 1.4 INCHES RAIN SINCE 4PM AND STILL
RAINING. 40 MPH WIND. NO HAIL.
640 PM WALHALLA ND COOP OBSVR RPTD 2.75 INCHES RAIN IN ONE HOUR.
HEAVIEST RAIN FELL AROUND 6PM.Special weather statement, Jul 26, 7:40 PM CDT, 3 hours 53 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 730 PM CDT SAT JUL 26 1986 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA... AT 630 PM CDT...SCATTERED THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN ..EXTENDED FROM NORTHWEST MINNESOTA ACROSS PORTIONS OF NORTHEAST.. CENTRAL AND EAST CENTRAL NORTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE 30 MILES WEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE MOVING EAST AT 20 MILES AN HOUR AND SHOULD MOVE INTO NORTHCENTRAL LA MOURE COUNTY OF SOUTHEAST NORTH DAKOTA BY 815 PM. IN ADDITION TO THE VERY HEAVY RAIN THIS STORM COULD PRODUCE BRIEF GUSTY WIND AND HAIL. OTHER THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM JUST NORTHWEST OF GRAND FORKS NORTH DAKOTA TO THE SOUTHWEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE ALSO MOVING EAST AT 20 MILES AN HOUR. MOVEMENT OF THE AREA OF SHOWERS AND THUNDERSTORMS WAS EAST AT 20 MILES AN HOUR. IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR THREATENING WEATHWR CONDITIONS.. AND STAY TUNED TO RADIO..T.V.X AS WELL AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. BENNETT
Special weather statement, Jul 26, 7:42 PM CDT, 3 hours 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION FOR TIME NATIONAL WEATHER SERVICE FARGO ND 730 PM CDT SAT JUL 26 1986 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA... AT 727 PM CDT...SCATTERED THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN ..EXTENDED FROM NORTHWEST MINNESOTA ACROSS PORTIONS OF NORTHEAST.. CENTRAL AND EAST CENTRAL NORTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE 30 MILES WEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE MOVING EAST AT 20 MILES AN HOUR AND SHOULD MOVE INTO NORTHCENTRAL LA MOURE COUNTY OF SOUTHEAST NORTH DAKOTA BY 815 PM. IN ADDITION TO THE VERY HEAVY RAIN THIS STORM COULD PRODUCE BRIEF GUSTY WIND AND HAIL. OTHER THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM JUST NORTHWEST OF GRAND FORKS NORTH DAKOTA TO THE SOUTHWEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE ALSO MOVING EAST AT 20 MILES AN HOUR. MOVEMENT OF THE AREA OF SHOWERS AND THUNDERSTORMS WAS EAST AT 20 MILES AN HOUR. IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR THREATENING WEATHWR CONDITIONS.. ANDY STAY TUNED TO RADIO..T.V. AS WELL AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. BENNETT
Local storm report, Jul 26, 8:27 PM CDT, 3 hours 6 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
825 PM CDT SAT JUL 26 1986
TIME EVENT
720 PM VRY HVY RAIN AND 40 MPH WIND AT WIMBLEDON ND.
815 PM RAINFALL AMOUNTS FROM HAM RADIO OPERATORS..{GRAFTON ND 1.4...
MINTO ND .50...COOPERSTOWN ND 1.6(FELL BETWEEN 715-800PM)...
LAKOTA ND 1.3...DEVILS LAKE ND 3.25.Special weather statement, Jul 26, 8:45 PM CDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 835 PM CDT SAT JUL 26 1986 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA... AT 825 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 55 MILES NORTHWEST OF FARGO NORTH DAKOTA..IN THE COLGATE/HOPE AREA OF EAST CENTRAL NORTH DAKOTA. THIS STORM WAS MOVING SOUTHEAST AT 15 MILES AN HOUR AND SHOULD MOVE INTO THE HUNTER/ARTHUR AREA OF NORTH CENTRAL CASS COUNTY OF NORTH DAKOTA BY 915 PM. THIS STORM HAD ONLY PRODUCED VERY HEAVY RAIN. OTHER SHOWERS AND THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN..EXTENDED FROM THE SOUTH DAKOTA LINE SOUTHWEST OF JAMESTOWN NORTH DAKOTA NORTHEAST THROUGH CENTRAL AND NORTHEAST NORTH DAKOTA INTO NORTHWEST MINNESOTA. THESE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MILES AN HOUR. IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR THREATENING WEATHER CONDITIONS.. AND STAY TUNED TO RADIO..T.V. AS WELL AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. BENNETT
Local storm report, Jul 26, 10:26 PM CDT, 1 hour 7 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1020 PM CDT SAT JUL 26 1986
TIME EVENT
830 PM CO-OPERATIVE OBSERVER AT HOPE NORTH DAKOTA..STEELE COUNTY..
REPORTED VERY HEAVY RAIN..NO HAIL..WIND ESTIMATED AT 40 MPH.
835 PM CO-OPERATIVE OBSERVER AT VALLEY CITY NORTH DAKOTA..BARNES
COUNTY..REPORTED VERY HEAVY RAIN WITH WIND ESTIMATED AT 30 TO
40 MPH WITH HIGHER GUST.
905 PM CO-OPERATIVE OBSERVER AT LITCHVILLE NORTH DAKOTA..BARNES
COUNTY..REPORTED VERY HEAVY RAIN..30 TO 40 MPH WIND AND PEA
TO MARBLE SIZED HAIL WHICH LASTED 17 MINUTES.
943 PM TRAIL COUNTY SHERIFF..10 MILES EAST OF GALESBURG NORTH DAKOTA
..TRAILL COUNTY..REPORTED VERY HEAVY RAIN..NO HAIL AND WINDS
50 TO 60 MPH.
1000 PM LITCHVILLE NORTH DAKOTA REPORTED 3.00 INCHES RAIN IN TOWN.
1005 PM CO-OPERATIVE OBSERVER AT LITCHVILLE NORTH DAKOTA..BARNES
COUNTY REPORTED 2.50 INCHES OF RAIN.
ANDERSENThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 9:59 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman | 46 min |
| Jul 27, 6:56 PM CDT | Tornado Warning | FGF | Becker | 54 min |
Nearby
Tornado Warnings in Minnesota, 1986Every tornado warning in 1986Tornadoes in 1986
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.