Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 124, NWS Kansas City, MO

August 15, 1997Henry County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 15, 1997, 12:00 AM CDT for Henry County, Missouri. It was in force for 45 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: Aug 15, 1997, 12:00 AM CDT (05:00 UTC)
Expired: Aug 15, 1997, 12:45 AM CDT
In force: 45 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Henry County, MO

The radar

The Pleasant Hill radar (KEAX), 63 km from the middle of the area, began a volume at 05:02 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
Aug 15, 12:10 AM CDT	Thunderstorm Wind	Urich, MO	Trees and power lines were reported downed by thunderstorm winds 2 miles southwest of Urich.

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

Springfield, MO (KSGF), launched 00:00Z, 5.0 hours before the alert went out and 165 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: 450 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 150500 RRA
SVRMCI
MOC083-150545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
MIDNIGHT CDT FRI AUG 15 1997

* SEVERE THUNDERSTORM WARNING FOR
    HENRY COUNTY - WEST CENTRAL MISSOURI
 
* UNTIL 1245 AM CDT

* SOME LOCATIONS AFFECTED
    HARTWELL BY 1215 AM
    CLINTON BY 1230 AM

* AT 1158 AM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM NEAR BALLARD MOVING EAST TO NORTHEAST AROUND 35 MPH.
  THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND GUSTS.

PEOPLE IN THE PATH OF THIS STORM CAN EXPECT 1 INCH OR LARGER
HAIL...WIND GUSTS TO 70 MPH OR HIGHER AND DANGEROUS LIGHTNING.

WHEN THUNDERSTORMS ARE OCCURRING...DO NOT USE TELEPHONES OR OTHER
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY.

DJV

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 14, 2:35 PM CDT, 9 hours 25 minutes earlier.

Area forecast discussion, Aug 14, 2:35 PM CDT, 9 hours 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
235 PM CDT THU AUG 14 1997

88-D DATA AT 1900 UTC SHWS LN OF SHWRS/TSTMS OVR ERN CWA WHICH SHLD BE
OUT OF RGN BY 2100 UTC. THIS APPRS TO BE IN LN WITH LATEST H7/H5 SHRT
WV TO TRACK ACR FCST AREA IN UNSEASONABLY LO HGHT ANOMALY REGIME OVR
NRN HALF OF U.S. XPCT ATM TO DRY OUT IN MID/UPR LVLS BHD SHRT THIS PM
HOWEVER STILL PLENTY OF MSTR LEFTOVER IN LWR TROPOSPHERE FM H8 ON DOWN.
DRY LN/SFC TROF XTNDS FM CNTL DAKOTAS SWRD TO WRN OK AND THIS SHLD
BECOME FOCUS FOR CNVTN THIS EVNG AS NXT H5 SHRT WV TRACKS EWD FM SE WY
ALG I-80. DECENT LO/MID LVL SHEAR SETS UP TNT AS SHRT WV PULLS ACR RGN
SO AM CONCERNED THAT RUC/ETA/NGM MAY BE MISSING THE MARK WITH CNVTV
DVLPMNT. INGREDIENTS THERE FOR PSBL SVR WX TNT ACR CWA ESPECIALLY NW OF
I-35. ONE BIG QUESTION IS WILL UPR SUPPORT FM FAST MVG SHRT WV OUT RUN
NRLY STNRY SFC TROF OVR CNTL KS. SFC ANLYS AT 1800 UTC SHWS WRM FNT
RETURNING NWRD FM SLN-EMP-SGF LN AND 3 MB PRESS FALLS AT CNK AND MHK.
HGHT FALLS APPR TO BE INDUCED BY SHRT WV AS OPPOSED TO PM DIURNAL FALL
AND WITH RIGHT READ QUAD OF UPR JET LIFTING THRU CAN SEE CNVTN DVLPG
WITH WEAK TRIPLE PT SCENARIO SETTING UP OVR NE KS ERLY THIS EVNG.
GRIDDED DATA SHWS WIDE INSTABILITY AXIS FOR ERN KS/MO/SRN IA THERFORE
WILL NOT TRY AND FINESE ZNS AND WILL KEEP CRNT FCST OF 50 POPS OVR
ENTIRE CWA TNT. HAVE ALREADY ALERTED OUR USERS FOR SVR POTENTIAL IN PM
HWO.

FOR FRI THINK THAT SHRT WV EXITS MO SO WILL DROP LO POP FOR WRN CWA AND
LEAVE IN FOR AM ACR E. WITH +20 C H8 TEMPS HEADING OUR WAY MAY BUMP MAX
TEMPS UP A TAD FOR FRI AND SAT. BASED ON PROJECTED TIMING OF NXT SHRT
WV IN NRN JET WILL LEAVE FCST DRY FRI NITE AND SAT AND INTROUDUCE NXT
CHC FOR SHWRS/TSTMS SAT NITE IN XTND FCST. 60 HR AVN SHWS MSTR POOLING
AHD OF NXT SHRT WV APPROACING NW MO ARND 0000 UTC SUN. OVERALL AVN
TIMING AND POPS AGREE WITH OUR THINKING HOWEVER THINK THAT FAN TEMPS
TOO CD.

.EAX...NONE.

BODNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 11:05 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	55 min
Aug 14, 11:34 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Lafayette	56 min
Aug 15, 12:12 AM CDT	Severe Thunderstorm Warning	EAX	Saline	33 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.