Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 21, NWS Kansas City, MO

April 30, 1997Holt County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 30, 1997, 3:19 AM CDT for Holt County, Missouri. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 30, 1997, 3:19 AM CDT (08:19 UTC)
Expired
Apr 30, 1997, 4:00 AM CDT
In force
41 min
Issued by
NWS Kansas City, MO
Area
Whole counties

County Holt County, MO

The radar

The Topeka radar (KTWX), 150 km from the middle of the area, began a volume at 08:21 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 8.3 hours before the alert went out and 127 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 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 00:00Z on 1997-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
1985 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
214 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.

251 
WUUS1 KMCI 300817 RRA
SVRMCI
MOC087-300900-

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

* SEVERE THUNDERSTORM WARNING FOR
    HOLT COUNTY - NORTHWEST MISSOURI
 
* UNTIL 400 AM CDT

* SOME LOCATIONS AFFECTED
    FOREST CITY BY 325 AM
    OREGON BY 330 AM
    NEW POINT BY 340 AM

* AT 318 AM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM NEAR HIGHLAND KANSAS MOVING NORTHEAST AT 40 MPH.

* PEOPLE IN THE PATH OF THIS STORM CAN EXPECT HAIL UP TO 1 INCH IN
  DIAMETER AND WIND GUSTS TO 60 MPH.

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

WELVAERT
 

&

The office that day

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

IssuedProductOfficeCountiesLasted
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, 9:58 AM CDTSevere Thunderstorm WarningEAXMercer32 min
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.