Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 28, NWS Kansas City, MO

April 30, 1997Chariton County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 30, 1997, 11:39 AM CDT for Chariton County, Missouri. It was in force for 31 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: Apr 30, 1997, 11:39 AM CDT (16:39 UTC)
Expired: Apr 30, 1997, 12:10 PM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Chariton County, MO

The radar

The Pleasant Hill radar (KEAX), 137 km from the middle of the area, began a volume at 16:42 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 30, 11:45 AM CDT	Hail 0.75	Keytesville, MO	Dime-size hail was reported by the public during a severe thunderstorm 5 miles north of Keytesville

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 12:00Z, 4.7 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

820 
WUUS1 KMCI 301639 RRA
SVRMCI
MOC041-301710-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
1139 AM CDT WED APR 30 1997

* SEVERE THUNDERSTORM WARNING FOR
    CHARITON COUNTY - CENTRAL MISSOURI
 
* UNTIL 1210 PM CDT

* SOME LOCATIONS AFFECTED
    BYNUMVILLE AND PRAIRIE HILL BY 1150 AM

* AT 1134 AM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 2 MILES NORTHWEST OF KEYTESVILLE MOVING NORTHEAST 45
  MPH.  THIS STORM HAS INTENSIFIED QUICKLY IN STRENGTH SINCE 1125 AM.

PEOPLE IN THE PATH OF THIS STORM CAN EXPECT HAIL NEAR ONE INCH

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER INSIDE A STRONG BUILDING.

SMITH

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 30, 2:18 AM CDT, 9 hours 21 minutes earlier.

Area forecast discussion, Apr 30, 2:18 AM CDT, 9 hours 21 minutes before

NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
218 AM CDT WED APR 30 1997

PCPN ON THE FOREFRONT TDY WITH TEMPS THRU PD ALSO UNDER THE MICROSCOPE.

MDLS MUCH SLOWER THAN LAST NITE AT THIS TIME...AND AS SUCH SYS ONLY
PROGD TO CROSS AREA TDY VICE ALREADY BEING PAST PER THE TUE 00Z RUN.
MDLS AND AWIPS WV IMAGERY INDICATE TWO PIECES TO COME THRU.  FIRST
PIECE OVR NC KS RESULTING IN CNVCTN OVR NE KS...WITH NEGATIVELY TILTED
SECOND PIECE EXPECTED TO DEEPEN AND MOVE ACRS DURG DAY TDY.  ASOCD
SFC LOW OVR SC KS AT 06Z WILL MOVE TWD NE MO BY 18Z.  THUS...THINK
PCPN A GOOD BET MOST AREAS TDY WITH BEST CHANCES OVR NRN ZONES.  ERN
MO LOOKS INTERESTING FOR LATER TDY.

TEMPS EVEN MORE OF A CHALLENGE TDY WITH PRETTY STNG CAA.  ETA MOST
GUNG-HO WITH THE COOLING...TAKING THE H8 +5C LINE WELL INTO NRN MO.
NGM NOT AS VIGOROUS WITH AVN IN THE MIDDLE.  FEEL AVN DEPICTION BEST...
AND WITH GUID NUMBERS VRY CLOSE CANT REALLY ARGUE.  ACTUAL HIGH FOR
THE DAY LIKELY TO OCCUR THIS MORN WITH AREA STILL IN WARM SECTOR UNTIL
SYS CAN PASS.  WILL WORD ZONES ACCORDINGLY WITH FALLING TEMPS...MAYBE
WITH SOME RECOVERY IN WRN GRPS FOR THE AFTN ALTHO FWC DOESNT THINK SO.
WINDS ALSO TO BLOW TDY AS LOW CRANKS WHILE CROSSING STATE.  WILL NOT
GO WITH ADVSY ATTM...BUT WILL HIT IN ZONES.

CLDS TO HANG ON INTO EVE HRS...THEN LOOK FOR A CLEARING TREND.  THIS IS
NEXT PROBLEM AS SFC RIDGING ALSO BUILDING IN.  THIS COMBO ARGUES FOR
CHILLY TEMPS.  FWC WAY TOO COOL YSTDY BUT LOOKS REASONABLE THIS TIME.
AGAIN...GUID NUMBERS RIGHT ON TOP OF EACH OTHER AND WILL STAY CLOSE.

WARMUP TO RETURN AGAIN BY THURS...WITH RAIN CHANCES BACK JUST BYND FCST
PD.

MCI WB 060/038 064/048 062 996--

WELVAERT

In the hours before

Local storm report, Apr 30, 6:16 AM CDT, 5 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
615 AM CDT WED APR 30 1997

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

0225 AM    OREGON                    MO   0.75 INCH HAIL
04/30/97   HOLT                           REPORTED BY SHERIFF

WELVAERT

Local storm report, Apr 30, 8:44 AM CDT, 2 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
844 AM CDT WED APR 30 1997

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

0345 AM    1 W FILLMORE              MO   1 INCH HAIL
04/30/97   ANDREW                         CO-OP OBSERVER REPORTED

0802 AM    WESTON                    MO   .75 INCH
04/30/97   BUCHANAN                       RELAYED FROM TV STATION

JULY

Local storm report, Apr 30, 8:46 AM CDT, 2 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
844 AM CDT WED APR 30 1997

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

0345 AM    1 W FILLMORE              MO   1 INCH HAIL
04/30/97   ANDREW                         CO-OP OBSERVER REPORTED

0802 AM    WESTON                    MO   .75 INCH
04/30/97   BUCHANAN                       RELAYED FROM TV STATION

JULY

Local storm report, Apr 30, 8:49 AM CDT, 2 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED WESTON REPORT
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
849 AM CDT WED APR 30 1997

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

0345 AM    1 W FILLMORE              MO   1 INCH HAIL
04/30/97   ANDREW                         CO-OP OBSERVER REPORTED

0802 AM    WESTON                    MO   .75 INCH
04/30/97   PLATTE                         RELAYED FROM TV STATION

JULY

Local storm report, Apr 30, 8:50 AM CDT, 2 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED WESTON REPORT
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
849 AM CDT WED APR 30 1997

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

0345 AM    1 W FILLMORE              MO   1 INCH HAIL
04/30/97   ANDREW                         CO-OP OBSERVER REPORTED

0802 AM    WESTON                    MO   .75 INCH
04/30/97   PLATTE                         RELAYED FROM TV STATION

JULY

Local storm report, Apr 30, 10:47 AM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT.
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MISSOURI
1045AM CDT WED APR 30 1997

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

0942 AM    MT MORIAH                 MO   1 INCH HAIL
04/30/97   HARRISON                       PUBLIC

1010 AM    PRINCETON                 MO   1 INCH HAIL
04/30/97   MERCER                         MERCER CO S. O.

BROWNING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 3:19 AM CDT	Severe Thunderstorm Warning	EAX	Holt	41 min
Apr 30, 3:34 AM CDT	Severe Thunderstorm Warning	EAX	Andrew	41 min
Apr 30, 9:37 AM CDT	Severe Thunderstorm Warning	EAX	Harrison	23 min
Apr 30, 9:55 AM CDT	Severe Thunderstorm Warning	EAX	Mercer	13 hr
Apr 30, 9:58 AM CDT	Severe Thunderstorm Warning	EAX	Mercer	32 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1997 Every severe thunderstorm warning in 1997

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.