Alert archive / Kansas / Tornado Warnings in 1987

Tornado Warning 7, NWS Topeka, KS

July 7, 1987Clay County, Kansas

NWS Topeka, KS issued this tornado warning at Jul 7, 1987, 7:15 PM CDT for Clay County, Kansas. It was in force for 65 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 7, 1987, 7:15 PM CDT (00:15 UTC)
Expired
Jul 7, 1987, 8:20 PM CDT
In force
65 min
Issued by
NWS Topeka, KS
Area
Whole counties

County Clay County, KS

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

TimeReportWhereRemark
Jul 7, 7:30 PM CDTHail 0.75Clay, KS

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

Topeka, KS (KTOP), launched 00:00Z, 0.3 hours before the alert went out and 137 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.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 1987-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3827 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 1987-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3827 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
597 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCNK 080015
TORCNK
KSC027-080120-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CONCORDIA KS
715 PM CDT TUE JUL 7 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 820 PM CDT FOR THE FOLLOWING COUNTY OF
 
NORTH CENTRAL KANSAS... CLAY
 
AT 710 PM CDT RADAR SHOWED A SEVERE THUNDERSTORM 10 MILES SOUTHWEST
OF CLAY CENTER MOVING TO THE NORTH AT 10 MPH.
 
THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY.  DON'T HESITATE.
A FEW SECONDS MIGHT SAVE YOUR LIFE.
 
DEA

The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 7:22 PM CDTSevere Thunderstorm WarningTOPClay58 min
Jul 7, 7:50 PM CDTSevere Thunderstorm WarningTOPShawnee40 min
Jul 7, 7:56 PM CDTSevere Thunderstorm WarningTOPClay, Ottawa64 min
Jul 7, 8:21 PM CDTSevere Thunderstorm WarningTOPWabaunsee34 min
Jul 7, 9:00 PM CDTSevere Thunderstorm WarningTOPOttawa35 min
Jul 7, 9:53 PM CDTSevere Thunderstorm WarningTOPSaline37 min
Jul 7, 10:06 PM CDTSevere Thunderstorm WarningTOPMitchell64 min
Jul 7, 10:50 PM CDTSevere Thunderstorm WarningTOPLincoln60 min
Jul 8, 3:40 AM CDTFlash Flood WarningTOPOsborne2 hr

Nearby

Tornado Warnings in Kansas, 1987Every tornado warning in 1987Tornadoes 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.