Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 421, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 30, 1986, 10:35 PM CDT for Canadian County, Oklahoma. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Sep 30, 1986, 10:35 PM CDT (03:35 UTC)
- Expired
- Sep 30, 1986, 11:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Canadian County, OK
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
Ok Cty/Will Rgrs, OK (KOKC), launched 00:00Z, 3.6 hours before the alert went out and 38 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
- 671 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 683 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KOKC 010339 COR
SVROKC
OKC017-310430-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1035 PM CDT TUE SEP 30 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1130 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
IN CENTRAL OKLAHOMA
..WESTERN CANADIAN
AT 1035 PM A SEVERE THUNDERSTORM WAS INDICATED 3 MILES SOUTHWEST OF
CALUMET MOVING NORTHEAST AT 45 MPH. LARGE HAIL AND STRONG WINDS ARE
POSSIBLE WITH THIS STORM.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, Sep 30, 4:41 PM CDT, 5 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 440 PM CDT TUE SEP 30 1986 ...A TORNADO WATCH IS IN EFFECT FOR WICHITA AND THE SURROUNDING COUNTIES UNTIL 9 PM... ...A FLASH FLOOD WATCH IS ALSO IN EFFECT FOR WICHITA AND THE SURROUND ING COUNTIES FOR TONIGHT... AT 435 PM THE WICHITA FALLS RADAR SHOWED AN ISOLATED VERY STRONG THUNDERSTORM MOVING INTO THE SOUTHWEST PORTION OF KNOX COUNTY TO THE WEST OF MUNDAY. THIS THUNDERSTORM COULD PRODUCE ALONG WITH VERY HEAVY RAIN...DANGEROUS LIGHTNING STRONG WINDS AND HAIL. RESIDENTS IN KNOX COUNTY ESPECIALLY WITHIN THE COMMUNITY OF BENJAMIN SHOULD BE ALERT TO THIS POTENTIALLY DANGEROUS THUNDERSTORM AND BE READY TO TAKE QUICK ACTION IF SEVERE WEATHER IS SIGHTED OR IF A WARNING IS ISSUED. MOVEMENT IF THIS STORM TO THE NORTHEAST AT 40 MPH.
Local storm report, Sep 30, 6:30 PM CDT, 4 hours 5 minutes before
STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1155PM CDT MON SEP 29 1986
COUNTY TIME(CDT) REPORT
OKLAHOMA 1530 PM NICKLE SIZE HAIL AT 74TH AND S. MAY IN OKC
OKLAHOMA- 1609- TORNADO FIRST REPORTED AT SE 59TH AND DOUGLAS
LINCOLN 1649 MOVING NORTHEAST. MOBILE HOME DESTROYED/HOUSE
DAMAGED/POWER LINES DOWN AT NE 63RD AND LUTHER RD.
TOUCHED DOWN AGAIN 4-5 MI SW OF WELLSTON.
OKLAHOMA 1616 60 MPH WIND IN NICOMA PARK
OKLAHOMA 1620 50TH AND CHOCTAW ROAD..WIND 60 TO 65 MPH BLOWING
LIMBS OFF TREES
ROGER MILLS 1730 NICKLE SIZE HAIL 5 MILES S.W. OF DURHAM
ELLIS 1810 GOLFBALL HAIL 18 MI S AND 4 MI E OF ARNETT
ELLIS 1835 NICKLE SIZE HAIL 18 S AND 4 E OF ARNETT
ROGER MILLS 1850 DIME SIZE HAIL 1 SE OF ROLL
WOODWARD 1928 BARN BLOWN OVER..POWER LINES DOWN N OF CESTOS
IN SOUTHEAST WOODWARD COUNTY
BECKHAM 1945 QUARTER SIZE HAIL 7 NE OF ERICK
ROGER MILLS 1950 DIME SIZE HAIL 7 WEST OF STRONG CITY
ALFALFA 2000 QUARTER SIZE HAIL AT CARMEN
CUSTER 2000 DIME SIZE HAIL 11 SE OF LEEDY
DEWEY 2028 DIME SIZE HAIL AT PUTNAM
CUSTER 2040 NICKLE SIZE HAIL 5 N OF CANUTE
GARFIELD 2030-2120 DIME SIZE HAIL FELL BETWEEN 2030 AND 2120
IN WEST ENID
KAY 2200 6C0 MPH WINDS AT PONCA CITYSpecial weather statement, Sep 30, 7:59 PM CDT, 2 hours 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 800 PM CDT TUE SEP 30 1986 ...A TORNADO WATCH IS IN EFFECT FOR WICHITA AND THE SURROUNDING COUNTIES UNTIL 9 PM... ...A FLASH FLOOD WATCH IS ALSO IN EFFECT FOR WICHITA AND THE SURROUND ING COUNTIES FOR TONIGHT... AT 755 PM CDT THE WICHITA FALLS RADAR SHOWED A VERY STRONG THUNDERSTORM MOVING ACROSS NORTHERN CLAY COUNTY. THIS THUNDERSTORM CONTINUES TO MOVE TO THE NORTHEAST AT 35 MPH AND WILL BE MOVING INTO JEFFERSON COUNTY OF SOUTHERN OKLAHOMA DURING THE NEXT FEW MINUTES.
Special weather statement, Sep 30, 8:18 PM CDT, 2 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 815 PM CDT TUE SEP 30 1986 ...TORNADO WATCH NUMBER 567 CANCELLED FOR PORTIONS OF OKLAHOMA... TORNADO WATCH NUMBER 567 HAS BEEN CANCELLED FOR COUNTIES NORTH OF A LINE FROM 20 MILES WEST OF WICHITA FALLS TO 35 MILES EAST OF MCALESTER. THE WATCH REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING COUNTIES... JEFFERSON...LOVE...CARTER...MURRAY...MARSHALL...JOHNSTON...BRYAN... ATOKA...PITTSBURG...LATIMER...CHOCTAW...PUSHMATAHA...LEFLORE... THUNDERSTORMS WHICH WERE IN THE CANCELLED PORTION OF THE WATCH HAVE EITHER DIMINISHED IN INTENSITY OR MOVED OUT OF THE STATE.
Special weather statement, Sep 30, 9:01 PM CDT, 1 hour 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 900 PM CDT TUE SEP 30 1986 ...THE TORNADO WATCH FOR WICHITA AND THE SURROUNDING COUNTIES HAS EXPIRED... ...THE FLASH FLOOD WATCH FOR WICHITA AND THE SURROUNDING COUNTIES HAS BEEN CANCELLED... AT 855 PM CDT ALL PREICPITATION HAD MOVED OUT NORTH TEXAS. HOWEVER... THE WICHITA FALLS RADAR CONTINUED TO SHOW SCATTERED SHOWERS AND THUNDERSTORMS CONTINUING OVER SOUTHERN OKLAHOMA. THE STRONGEST STORM WAS LOCATED TO THE WEST OF ARDMORE. MOVEMENT TO THE NORTHEAST AT 35 MPH.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 10:18 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 32 min |
| Sep 30, 11:40 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 65 min |
| Oct 1, 1:00 AM CDT | Severe Thunderstorm Warning | OUN | Seminole | 40 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1986Every severe thunderstorm warning 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.