Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 270, NWS Kansas City, MO

August 29, 2001Jackson County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 29, 2001, 7:47 PM CDT for Jackson County, Missouri. It was in force for 58 min. 3 reports came from 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, with what was reported inside it.

The facts

Issued
Aug 29, 2001, 7:47 PM CDT (00:47 UTC)
Expired
Aug 29, 2001, 8:45 PM CDT
In force
58 min
Issued by
NWS Kansas City, MO
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Jackson County, MO

The radar

The Pleasant Hill radar (KEAX), 21 km from the middle of the area, began a volume at 00:38 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.

What was reported inside it

TimeReportWhereRemark
Aug 29, 7:55 PM CDTThunderstorm Wind 57 ELake Lotawana, MO
Aug 29, 7:55 PM CDTThunderstorm Wind 57 ELees Summit, MO
Aug 29, 8:05 PM CDTThunderstorm Wind 57 EGrain Vly, MO

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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.8 hours before the alert went out and 107 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 2001-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1904 joules per kilogram.LCLEL10008507005003002001001 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 2001-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
1904 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1877 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
20 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.

732 
WUUS53 KEAX 300048
SVRMCI
MOC095-300145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY-PLEASANT HILL MO
747 PM CDT WED AUG 29 2001

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JACKSON COUNTY IN WEST CENTRAL MISSOURI
  THIS INCLUDES THE CITY OF KANSAS CITY

* UNTIL 845 PM CDT

* AT 747 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER LAKE LOTAWANA...OR ABOUT 15 MILES NORTH OF
  HARRISONVILLE...MOVING NORTH AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEES SUMMIT AT 755 PM CDT
  LAKE LOTAWANA AT 805 PM CDT
  GRAIN VALLEY AT 840 PM CDT
  BUCKNER AT 845 PM CDT

THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE DIME SIZE HAIL...AND
WINDS IN EXCESS OF 60 MPH. FOR YOUR SAFETY...MOVE INDOORS AND STAY
AWAY FROM WINDOWS. REMEMBER...LIGHTNING IS A THREAT FROM ALL
THUNDERSTORMS. HEAVY RAINS CAN CAUSE LOCALIZED FLOODING OF LOW LYING
AREAS.

LAT...LON 3886 9459 3885 9414 3915 9413 3912 9458

$$
PC

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 Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 2:30 PM CDT, 5 hours 17 minutes earlier.

Area forecast discussion, Aug 29, 2:30 PM CDT, 5 hours 17 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
230 PM CDT WED AUG 29 2001

MAIN FOCUS FOR THIS FORECAST IS ON PRECIP CHANCES THURSDAY AND
FRIDAY...AND TEMPS OVER THE WEEKEND.

LATEST VISIBLE IMAGERY SHOWS CUMULUS BUBBLING ON SOUTHERN EDGE OF
THE FORECAST AREA THIS AFTERNOON...WITH STORMS POPPING TO THE
SOUTHEAST IN EASTERN SECTIONS OF THE SGF CWA. COLD FRONT REMAINS
WELL TO THE NORTH...EXTENDING FROM WEST CENTRAL MN TO NORTHEAST CO.

IN THE IMMEDIATE SHORT TERM...LEANING TOWARD NO POPS IN THE ZONES
TONIGHT...BUT WILL MAKE LAST MINUTE CALL ON THE SOUTHEAST
ZONES...AND WATCH FOR STORM DEVELOPMENT/MOVEMENT FROM ROLLA/LEBANON
AREA. BASED ON CURRENT DEWPOINT TRENDS...AND FRONT REMAINING NORTH
OF THE REGION...STILL LOOKS LIKE UPPER 60S TO AROUND 70 LOOK GOOD
FOR MINS TONIGHT.

SURFACE FRONT STILL PROGGED TO MOVE THROUGH THE FORECAST AREA
THURSDAY EVENING AND FRIDAY MORNING AS UPPER TROUGH SHIFTS INTO
GREAT LAKES REGION. NO HUGE DIFFERENCES SHOWING UP BETWEEN BASIC
MODEL FIELDS TODAY. WILL LEAN TOWARD THE AVN...WHICH HAS SLIGHTLY
FASTER MOVEMENT WITH THE FRONT...AND SEEMS TO BE DOING A BETTER JOB
WITH MOISTURE RETURN/QPF OUTPUT...AS IT PICKED UP ON PRECIP THIS
AFTERNOON TO THE SOUTH.

EVEN WITH FASTER MOVEMENT OF FRONT...WILL LAG POPS UNTIL THURSDAY
AFTERNOON FOR THE SOUTHERN ZONES...WITH LACK ON DECENT FORCING.
OTHERWISE...CHANCE POPS OVER THE ENTIRE AREA FOR THURSDAY NIGHT
STILL LOOK GOOD. ALSO...WILL TRIM POPS FROM THE NORTHERN ZONES FOR
FRIDAY...AND CONTINUE TREND OF TAPERING POPS ELSEWHERE ON FRIDAY.

LATEST MRF/ECMWF INDICATES JUST A BRIEF SHOT OF COOLER AIR THROUGH
THE WEEKEND BEFORE TEMPERATURES REBOUND SOME EARLY NEXT WEEK AS
WESTERLIES SHIFT BACK TO THE NORTH.

MAV TEMPS LOOK TOO LOW SO WILL TREND MORE TOWARD FWC NUMBERS FOR
EARLY PERIODS.

THANKS FOR COORDINATION SGF...

.EAX...
KS...NONE.
MO...NONE.

MMT/PC

In the hours before

Local storm report, Aug 29, 5:49 PM CDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
549 PM CDT WED AUG 29 2001

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

0650 PM    DRESDEN                   MO   .75 INCH HAIL
08/29/01   PETTIS                         REPORTED BY EMERGENCY
                                          MANAGEMENT.

0650 PM    LA MONTE                  MO   .75 INCH HAIL
08/29/01   PETTIS                         REPORTED BY EMERGENCY
                                          MANAGEMENT.

0700 PM    5 N SEDALIA               MO   WIND DAMAGE
08/29/01   PETTIS                         3 TO 4 EIGHT INCH
                                          DIAMETER TREES DOWNED.
                                          REPORTED BY EMERGENCY
                                          MANAGEMENT.

0730 PM    4 N ARCHIE                MO   .75 INCH HAIL
08/29/01   CASS                           REPORTED BY OFF-DUTY
                                          NWS EMPLOYEE.

0736 PM    1 W HARRISONVILLE         MO   1 INCH HAIL
08/29/01   CASS                           REPORTED BY PUBLIC.

0740 PM    LIBERTY                   MO   65 MPH TSTM GUST
08/29/01   CLAY                           REPORTED BY STORM
                                          SPOTTER.

0755 PM    LAKE LOTAWANA             MO   WIND DAMAGE
08/29/01   JACKSON                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0755 PM    LEES SUMMIT               MO   WIND DAMAGE
08/29/01   JACKSON                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0805 PM    GRAIN VLY                 MO   WIND DAMAGE
08/29/01   JACKSON                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0855 PM    EXCELSIOR SPGS            MO   WIND DAMAGE
08/29/01   CLAY                           TREE DOWN THROUGH ROOF
                                          OF HOUSE. REPORTED BY
                                          LAW ENFORCEMENT OFFICIAL.

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 7:23 PM CDTSevere Thunderstorm WarningEAXCass67 min
Aug 29, 8:40 PM CDTSevere Thunderstorm WarningEAXClay50 min
Aug 30, 1:54 PM CDTSevere Thunderstorm WarningEAXPlatte51 min
Aug 30, 2:03 PM CDTSevere Thunderstorm WarningEAXDeKalb27 min
Aug 30, 2:33 PM CDTSevere Thunderstorm WarningEAXClinton42 min
Aug 30, 3:03 PM CDTSevere Thunderstorm WarningEAXJackson42 min
Aug 30, 4:16 PM CDTSevere Thunderstorm WarningEAXRay44 min
Aug 30, 5:16 PM CDTSevere Thunderstorm WarningEAXChariton44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2001Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.