Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 27, NWS Kansas City, MO

April 30, 1997Mercer County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 30, 1997, 9:58 AM CDT for Mercer County, Missouri. It was in force for 32 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, 9:58 AM CDT (14:58 UTC)
Expired
Apr 30, 1997, 10:30 AM CDT
In force
32 min
Issued by
NWS Kansas City, MO
Area
Whole counties

County Mercer County, MO

The radar

The Des Moines radar (KDMX), 146 km from the middle of the area, began a volume at 15:00 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
Apr 30, 10:10 AM CDTHail 1Princeton, MOOne inch diameter hail was reported in Princeton by the Mercer County Sheriff's office during a severe thunderstorm.

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, 3.0 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 1997-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1997-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.19395878Sfc1 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
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.

000 
TTAA00 KMCI 301458 RRA
SVRMCI
MOC129-301530-

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

* SEVERE THUNDERSTORM WARNING FOR
    MERCER COUNTY - NORTH CENTRAL MISSOURI
 
* UNTIL 1030 AM CDT

* SOME LOCATIONS AFFECTED
    MEDINA BY 10 AM
    PRINCETON BY 1010 AM

* AT AT 952 AM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 3 MILES SOUTHWEST OF MEDINA MOVING NORTHEAST AT 45
  MPH.

PEOPLE IN THE PATH OF THIS STORM CAN EXPECT HAIL UP TO 1 INCH IN
DIAMETER.

SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND DAMAGING WINDS.  FOR
YOUR SAFETY...MOVE INDOORS AND STAY AWAY FROM WINDOWS.

CORRECTED PM TO AM IN TEXT FOR EXPIRATION TIME
MAXIMUK

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, 7 hours 40 minutes earlier.

Area forecast discussion, Apr 30, 2:18 AM CDT, 7 hours 40 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, 6:15 AM CDT, 3 hours 43 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, 6:16 AM CDT, 3 hours 42 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, 1 hour 14 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, 1 hour 12 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, 1 hour 9 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, 1 hour 8 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

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 3:19 AM CDTSevere Thunderstorm WarningEAXHolt41 min
Apr 30, 3:34 AM CDTSevere Thunderstorm WarningEAXAndrew41 min
Apr 30, 9:37 AM CDTSevere Thunderstorm WarningEAXHarrison23 min
Apr 30, 9:55 AM CDTSevere Thunderstorm WarningEAXMercer13 hr
Apr 30, 11:39 AM CDTSevere Thunderstorm WarningEAXChariton31 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1997Every 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.