Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 47, NWS Kansas City, MO

April 9, 2001Johnson County, Lafayette County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 9, 2001, 11:59 PM CDT for Johnson County, Lafayette County, Missouri. It was in force for 61 min. 2 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: Apr 9, 2001, 11:59 PM CDT (04:59 UTC)
Expired: Apr 10, 2001, 1:00 AM CDT
In force: 61 min
Issued by: NWS Kansas City, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Johnson County, MO, Lafayette County, MO

The radar

The Pleasant Hill radar (KEAX), 34 km from the middle of the area, began a volume at 05:01 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

Time	Report	Where	Remark
Apr 10, 12:15 AM CDT	Thunderstorm Wind 55 E	Higginsville, MO
Apr 10, 12:16 AM CDT	Hail 0.88	Mayview, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 9, 6:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 5.0 hours before the alert went out and 152 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: 18 J/kg
Mixed-layer CIN: -352 J/kg
Mixed-layer LCL: 1725 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 276 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 
WUUS53 KEAX 100500
SVRMCI
MOC101-107-100600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1159 PM CDT MON APR 9 2001

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN JOHNSON COUNTY IN WEST CENTRAL MISSOURI
  LAFAYETTE COUNTY IN WEST CENTRAL MISSOURI

* UNTIL 100 AM CDT

* AT 1159 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ODESSA...OR ABOUT 21 MILES NORTHWEST OF   
  WARRENSBURG...MOVING NORTHEAST AT 35 MPH. THIS STORM HAS HAD A 
  HISTORY OF PRODUCING LARGE HAIL UP TO ONE AND A HALF INCHES IN 
  DIAMETER.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAYVIEW AT 1205 AM CDT
  HIGGINSVILLE AT 1215 AM CDT
  DOVER AT 1225 AM CDT

LAT...LON 3877 9413 3875 9392 3880 9351 3922 9352
          3913 9411

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 Apr 9, 1:59 PM CDT, 10 hours earlier.

Area forecast discussion, Apr 9, 1:59 PM CDT, 10 hours before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
158 PM CDT SUN APR 8 2001

MAIN FORECAST CONCERNS WILL BE THUNDERSTORM POTENTIAL FOR THE NEXT
48 HOURS. IN THE SHORT TERM...WEAK FRONT HAS PUSHED AS FAR SOUTH AS
ABOUT A KIRK-KMKC LINE. AM NOT EXPECTING IT TO MOVE MUCH FURTHER AS
SURFACE HEATING...ALONG WITH THE INITIATION OF TROUGHING TO THE LEE
OF THE ROCKIES...SHOULD IMPEDE ANY ADDITIONAL SOUTHWARD MOVEMENT.
SOME SCATTERED CONVECTION WILL MOST LIKELY DEVELOP THIS EVENING
ALONG AND SOUTH OF BOUNDARY. GOING CHANCE POPS HAVE THIS COVERED
WELL.

MODERATE TO STRONG LOW-LEVEL JET SETS UP OVER SOUTHERN PLAINS
TONIGHT...IN RESPONSE TO DEEPENING SYSTEM OVER EASTERN
COLORADO...PROVIDING ADDITIONAL FORCING FOR SHOWERS AND
THUNDERSTORMS INTO SOUTHEAST KANSAS AND SOUTHWEST MISSOURI.  AS
TUESDAY PROGRESSES WILL LIKELY SEE WARM FRONT SHIFT NORTHWARD...AND
CHANCES FOR THUNDERSTORM ACTIVITY IN EAX CWA INCREASE. SEVERE
WEATHER ALSO A POSSIBILITY...BUT BEST THREAT WILL REMAIN TO THE WEST.

SYSTEM FOR TUESDAY AND WEDNESDAY AMAZINGLY SIMILAR TO SYSTEM LATE
LAST WEEK. MODELS CURRENTLY SURGE DRY LINE IN WESTERN PORTION OF CWA
BETWEEN 12Z AND 18Z WEDNESDAY MORNING...NOT A REAL FAVORABLE TIME
FOR SEVERE WEATHER. HOWEVER...MODEL FORECASTS WERE FAST WITH SYSTEM
LAST WEEK...SO WE WILL HAVE TO WATCH HOW THINGS EVOLVE. EXPECTING TO
INSERT SOME TYPE OF WINDY/BREEZY WORDING IN THE FORECAST FOR TUESDAY
AND WEDNESDAY...AS GRADIENT TIGHTENS AROUND INTENSE SURFACE LOW
MOVING TO THE NORTHWEST OF CWA.

UPPER FLOW PATTERN BECOMES A BIT MORE ZONAL INTO THE
EXTENDED...WHICH WILL LEAVE REGION SUSCEPTIBLE TO PERIODIC FAST
MOVING UPPER WAVES. CURRENT EXTENDED MODELS BRING NEXT SYSTEM
THROUGH ON FRIDAY. AREA APPEARS TO BE IN COOLER AND DRIER AIR BY
THIS TIME...SO AM PLANNING TO MOVE CURRENT CHANCE FOR SHOWERS ON
SATURDAY UP TO FRIDAY.

CONSIDERING HOW TEMPERATURES HAVE RESPONDED THE LAST SEVERAL
DAYS...FWC AND MAV GUIDANCE APPEARS A BIT COOL. AM PLANNING TO GO
ABOVE THESE NUMBERS.

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

MJM

In the hours before

Local storm report, Apr 9, 10:29 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1029 PM CDT MON APR 09 2001

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

1024 PM    8 S SEDALIA               MO   1 INCH HAIL
04/09/01   PETTIS                         REPORTED BY EMERGENCY
                                          MANAGEMENT.

Local storm report, Apr 9, 10:35 PM CDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1035 PM CDT MON APR 09 2001

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

1028 PM    ARCHIE                    MO   .88 INCH HAIL
04/09/01   CASS                           REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

Local storm report, Apr 9, 11:26 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1126 PM CDT MON APR 09 2001

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

1125 PM    PECULIAR                  MO   .75 INCH HAIL
04/09/01   CASS                           REPORTED BY STORM
                                          SPOTTER.

Local storm report, Apr 9, 11:29 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1129 PM CDT MON APR 09 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNT>Y LOCATION....

1117 PM    CHILHOWEE                 MO   1.75 INCH HAIL
04/09/01   JOHNSON                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

Local storm report, Apr 9, 11:39 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1139 PM CDT MON APR 09 2001

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

1136 PM    PLEASANT HILL             MO   .88 INCH HAIL
04/09/01   CASS                           AT NWS OFFICE

Local storm report, Apr 9, 11:58 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1158 PM CDT MON APR 09 2001

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

0950 PM    CLINTON                   MO   LARGE TREE LIMBS
04/09/01   HENRY                          DOWN REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:03 PM CDT	Severe Thunderstorm Warning	EAX	Howard	42 min
Apr 9, 7:12 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	48 min
Apr 9, 7:34 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette, Saline	56 min
Apr 9, 7:42 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	48 min
Apr 9, 8:24 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	51 min
Apr 9, 8:46 PM CDT	Severe Thunderstorm Warning	EAX	Bates	59 min
Apr 9, 9:41 PM CDT	Severe Thunderstorm Warning	EAX	Henry	49 min
Apr 9, 9:47 PM CDT	Severe Thunderstorm Warning	EAX	Bates	43 min
Apr 9, 10:15 PM CDT	Severe Thunderstorm Warning	EAX	Cass	60 min
Apr 9, 10:19 PM CDT	Severe Thunderstorm Warning	EAX	Pettis	41 min
Apr 9, 10:46 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	59 min
Apr 9, 11:19 PM CDT	Severe Thunderstorm Warning	EAX	Cass	41 min
Apr 9, 11:34 PM CDT	Severe Thunderstorm Warning	EAX	Pettis	41 min
Apr 9, 11:38 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	37 min
Apr 10, 12:32 AM CDT	Severe Thunderstorm Warning	EAX	Saline	58 min
Apr 10, 12:51 AM CDT	Severe Thunderstorm Warning	EAX	Cooper	54 min
Apr 10, 12:54 AM CDT	Severe Thunderstorm Warning	EAX	Howard	66 min
Apr 10, 1:03 AM CDT	Severe Thunderstorm Warning	EAX	Lafayette	57 min
Apr 10, 1:32 AM CDT	Severe Thunderstorm Warning	EAX	Saline	58 min
Apr 10, 2:36 AM CDT	Severe Thunderstorm Warning	EAX	Bates	39 min
Apr 10, 4:27 PM CDT	Tornado Warning	EAX	Cass	33 min
Apr 10, 4:30 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	45 min
Apr 10, 4:52 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Lafayette	53 min
Apr 10, 4:52 PM CDT	Severe Thunderstorm Warning	EAX	Cass	53 min
Apr 10, 5:05 PM CDT	Tornado Warning	EAX	Cass, Johnson	55 min
Apr 10, 5:29 PM CDT	Flash Flood Warning	EAX	Johnson, Lafayette	4 hr
Apr 10, 5:29 PM CDT	Tornado Warning	EAX	Pettis	46 min
Apr 10, 5:38 PM CDT	Severe Thunderstorm Warning	EAX	Saline	52 min
Apr 10, 5:45 PM CDT	Flash Flood Warning	EAX	Pettis, Saline	3 hr
Apr 10, 5:59 PM CDT	Tornado Warning	EAX	Cooper	61 min
Apr 10, 6:34 PM CDT	Severe Thunderstorm Warning	EAX	Andrew	41 min
Apr 10, 6:38 PM CDT	Flash Flood Warning	EAX	Cooper, Howard	112 min

Nearby

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