Alert archive / Kansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 116, NWS Topeka, KS

September 7, 1999Geary County, Wabaunsee County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Sep 7, 1999, 8:32 PM CDT for Geary County, Wabaunsee County, Kansas. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 7, 1999, 8:32 PM CDT (01:32 UTC)
Expired: Sep 7, 1999, 9:00 PM CDT
In force: 28 min
Issued by: NWS Topeka, KS
Area: Whole counties

Counties Geary County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 21 km from the middle of the area, began a volume at 01:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 1.5 hours before the alert went out and 277 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 658 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 2024 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

NWS Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 3:36 PM CDT, 4 hours 56 minutes earlier.

Area forecast discussion, Sep 7, 3:36 PM CDT, 4 hours 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TOPEKA KS
336 PM CDT TUE SEP 7 1999

THUNDERSTORM CHANCES TONIGHT AND EARLY WEDNESDAY MAIN CONCERNS THEN
TEMPERATURES THROUGH THE PERIOD.

UPPER LEVEL SHORTWAVE MOVING THROUGH CENTRAL KS COMPOUNDING PROBLEM
IN THE SHORT TERM KEEPING PRECIPITATION FROM THIS MORNING GOING OVER
SOUTH CENTRAL KS AND NOW DEVELOPING OVER NORTHEAST PARTS OF EAST
CENTRAL KANSAS.  GIVEN LATEST RADAR...WILL GO WITH SCATTERED
THUNDERSTORMS OVER MUCH OF NORTHEAST AND EAST CENTRAL KS FOR
TONIGHT.  COULD SEE SOME BREAK DURING THE EVENING AFTER SUN GOES
DOWN AND SHORT-WAVE EJECTS EAST...THEN COLD FRONT NOW CURVING FROM
EASTERN NEBRASKA INTO NORTHWEST KANSAS PUSHES ACROSS AREA.  STRONG
VORT DIVING DOWN WITH THIS SYSTEM AND KEEPING VERTICAL MOTION OVER
MUCH OF CWA FOR THE OVERNIGHT PERIOD.  NORTH CENTRAL CHANCES MAINLY
FOR THE EVENING HOURS.  LATEST RUC KEEPS SOME QPF OVER THIS AREA
THROUGH 03Z.  SOME LIFT MAY LINGER OVER PARTS OF THE EAST
CENTRAL...GENERALLY ALONG AND SOUTHEAST OF I-35 EARLY WED MORNING
AND AFTER COORDINATION WITH KEAX AND KICT HAVE OPTED TO LEAVE A LOW
POP FOR THESE AREAS EARLY IN THE MORNING.  OTHERWISE TROUGH DEEPENS
TO THE EAST AND COOLER AIR SPILLS INTO AREA THE NEXT FEW DAYS.
COULD SEE SOME CU DEVELOP IN THE AFTERNOON TOMORROW SO WENT WITH
PARTLY SUNNY SKIES.  TEMPERATURE WISE GUIDANCE LOWS TONIGHT SIMILAR
AND LOOK REASONABLE BUT WILL GO A TAD COOLER IN THE NORTH CENTRAL.
FOR THE LATER PERIOD HIGHS AND LOWS WILL FAVOR THE COOLER AND
NUMBERS AS THICKNESS AND H850 MB TEMPS COOL THROUGH THE PERIOD.
MODELS SHOWING 25 TO 35 KTS AT H850 MB LATE TONIGHT AND WED AND WILL
MENTION BREEZY FOR WINDS ON WEDNESDAY.

FOR THE STORMS LATE THIS AFTERNOON AND EARLY EVENING COULD SEE SOME
POSSIBLY SEVERE OVER THE EAST CENTRAL COUNTIES AND WILL PUT IN ZONES
THERE...ANY STORMS COULD HAVE SOME LOCALLY HEAVY RAIN.

.TOP...NONE
FRANTZ

In the hours before

Local storm report, Sep 7, 4:54 PM CDT, 3 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
454 PM CDT TUE SEP 07 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    VALLEY FALLS              KS    WIND DAMAGE
09/07/99   JEFFERSON                       DAMAGE TO OUT BUILDINGS

Local storm report, Sep 7, 4:54 PM CDT, 3 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
454 PM CDT TUE SEP 07 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    VALLEY FALLS              KS    WIND DAMAGE
09/07/99   JEFFERSON                       DAMAGE TO OUT BUILDINGS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 7:18 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley, Wabaunsee	42 min
Sep 7, 7:57 PM CDT	Severe Thunderstorm Warning	TOP	Riley	28 min

Nearby

Severe Thunderstorm Warnings in Kansas, 1999 Every severe thunderstorm warning in 1999

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; radar from the NEXRAD Level II archive.