Alert archive / Kansas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 91, NWS Topeka, KS

May 9, 2001Marshall County, Washington County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at May 9, 2001, 11:56 PM CDT for Marshall County, Washington County, Kansas. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 9, 2001, 11:56 PM CDT (04:56 UTC)
Expired: May 10, 2001, 12:45 AM CDT
In force: 49 min
Issued by: NWS Topeka, KS
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Marshall County, KS, Washington County, KS

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 9, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 4.9 hours before the alert went out and 139 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: 2311 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1658 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KTOP 100457
SVRTOP

KSC117-201-100545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TOPEKA KS
1156 PM CDT WED MAY 9 2001

THE NATIONAL WEATHER SERVICE IN TOPEKA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN NORTH CENTRAL KANSAS   
  WESTERN MARSHALL COUNTY IN NORTHEAST KANSAS

* UNTIL 1245 AM CDT

* AT 1152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WASHINGTON...OR ABOUT 21 MILES WEST OF
  MARYSVILLE...MOVING EAST AT 55 MPH.

* SOME LOCATIONS AFFECTED...
  HANOVER
  BARNES
  WATERVILLE
  MARYSVILLE
  BLUE RAPIDS

LARGE HAIL...VERY HEAVY RAIN AND DAMAGING WINDS ARE LIKELY WITH THIS
STORM. TAKE COVER INSIDE A BUILDING.

SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE yLOWEST FLOOR OR A
BASEMENT.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA OUTLETS FOR THE
LATEST SEVERE WEATHER INFORMATION.

LAT...LON 3993 9712 3964 9718 3964 9647 3991 9648

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 May 9, 2:52 PM CDT, 9 hours 4 minutes earlier.

Area forecast discussion, May 9, 2:52 PM CDT, 9 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TOPEKA KS
252 PM CDT WED MAY 9 2001

...THUNDERSTORM CHCS MAIN FORECAST PROBLEM...

WELL DEFINED UPPER WAVE NOW CROSSING CNTRL ROCKIES...APPEARS A
MERGER OF TWO UPPER WAVES. THIS IS THE WAVE THAT SHOULD TRIGGER
CONVECTION TO OUR NORTHWEST. MODELS' TIMING OF THIS WAVE...AND
CONTINUITY...TOUGH TO FOLLOW. LATEST RUC...19Z INITIAL...APPEARS TO
BE GETTING A LITTLE BETTER HANDLE ON THIS WAVE.  QUESTION THEN IS
WHETHER TSTMS WILL MOVE/BACKBUILD INTO THE AREA AFTER MIDNIGHT. WITH
HIGH CAPE VALUES ON 18Z TOP SNDG...VERY UNSTABLE AIR WILL BE FEEDING
INTO THE TSTM COMPLEX TO OUR NORTH. OUTFLOW BNDRY...IF NOT TSTMS
THEMSELVES...WILL BE PUSHING THRU/INTO ALL THE CWA BY THURSDAY
FORNN. THUS ANOTHER BNDRY WILL BE IN PLACE FOR ACTIVE CONVECTION ON
THURSDAY. FRONTAL BNDRY INTO THE AREA PER ALL MODELS TMRW NIGHT SO
WILL RAISE TSTM CHCS FROM ONGOING FCST TO LIKELY CAT. QUESTION THEN
IS WHERE RECURRING AREA WILL BE ON FRIDAY. AN ACTIVE THURSDAY NIGHT
MAY MEAN MOST ACTIVITY ON FRIDAY WILL BE SOUTH OF OUR AREA.
QUESTIONS RE. THIS SCENARIO BEGS FOR AT LEAST SOME MENTION PCPN ALL
CWA ON FRIDAY. COOLER TEMPS WITH CLOUDS/PCPN ALSO IN THE WORKS.
FRIDAY NIGHT AM INCLUDING SOME MENTION OF PCPN SRN PTN CWA...BUT
THIS MAY NOT OCCUR GIVEN PREVAILING POSITION OF OUTFLOW BNDRYS AT
THAT TIME. SATURDAY APPEARS DRY WITH BNDRY WELL SOUTH OF AREA AND
NORTHWEST FLOW PREVAILING.

.TOP...NONE

In the hours before

Local storm report, May 9, 11:50 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1150 PM CDT WED MAY 09 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
*
1147 PM    KACKLEY                   KS    .75 INCH HAIL
05/09/01   REPUBLIC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 10:29 PM CDT	Severe Thunderstorm Warning	TOP	Republic	56 min
May 9, 11:31 PM CDT	Severe Thunderstorm Warning	TOP	Republic	39 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2001 Every severe thunderstorm warning in 2001

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.