Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 19, NWS Kansas City, MO

April 18, 1997Howard County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 18, 1997, 10:46 PM CDT for Howard County, Missouri. It was in force for 29 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 18, 1997, 10:46 PM CDT (03:46 UTC)
Expired: Apr 18, 1997, 11:15 PM CDT
In force: 29 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Howard County, MO

The radar

The Pleasant Hill radar (KEAX), 141 km from the middle of the area, began a volume at 03:47 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 18, 10:55 PM CDT	Hail 0.75	New Franklin, MO	Dime-size hail was reported during a severe thunderstorm along Route 5 10 miles north of New Franklin.

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 18, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.8 hours before the alert went out and 255 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: 445 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 3303 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 190345 RRA
SVRMCI
MOC089-190415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
1046 PM CDT FRI APR 18 1997

* SEVERE THUNDERSTORM WARNING FOR
  HOWARD COUNTY - CENTRAL MISSOURI

* UNTIL 1115 PM CDT
 
* SOME LOCATIONS AFFECTED
    GLASGOW
    FAYETTE
    NEW FRANKLIN

* AT 1044 PM RADAR INDICATED A SEVERE THUNDERSTORM NEAR GLASGOW
  MOVING EAST-SOUTHEAST AT 35 MPH.

* THE STORM WILL BE NEAR FAYETTE AT 1100 PM AND NEW FRANKLIN AT 1110
  PM.  THIS STORM WILL PRODUCE HAIL ONE 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.



MANION

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 18, 2:54 PM CDT, 7 hours 52 minutes earlier.

Area forecast discussion, Apr 18, 2:54 PM CDT, 7 hours 52 minutes before

NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
254 PM CDT FRI APR 18 1997

CONVECTIVE POTENTIAL FOR TONIGHT MAIN CONCERN FOR SHORT TERM. IN
THE LONGER TERM FORECAST PROBLEMS FOCUS ON NEXT WAVE RIDING DOWN IN
NORTHWEST FLOW SATURDAY NIGHT INTO SUNDAY. NOSE OF HIGHER SURFACE
DEWPOINTS PUNCHING UP INTO SOUTHEAST NEBRASKA THIS AFTERNOON. THIS
COMBINED WITH BOUNDARY IN VICINITY AND GOOD DIURNAL HEATING SHOULD
LEAD TO SCATTERED -TSRA DEVELOPMENT ACROSS SOUTHEAST 2/3 OF CWA
EARLY THIS EVENING. SOME CU/TCU ALREADY NOTED ON SATELLITE IMAGERY
OUT OVER NORTHWEST/NORTH CENTRAL KANSAS ALONG BOUNDARY.

FRONT MAKES IT THROUGH CWA BY MIDNIGHT...SO WOULD EXPECT ANY
PRECIPITATION THREAT TO BE OVER AFTER THIS EVENING. AIR NOT REALLY
THAT COOL BEHIND BOUNDARY SO TEMPERATURES SHOULD NOT DROP OFF TOO
MUCH TONIGHT INTO TOMORROW. MODELS IN DECENT AGREEMENT RETURNING
MOISTURE TO AREA ON SATURDAY NIGHT/SUNDAY AS NEXT SYSTEM SPINS UP
OVER HIGH PLAINS. MODELS SEEM TO BE MORE AGGRESSIVE WITH
PRECIPITATION...ESPECIALLY NGM...THAN WITH BOUNDARY PUSHING THROUGH
THIS EVENING. IN ADDITION...H8-H7 LAYER MEAN VERTICAL VELOCITY AND
H8-H7 Q-VECTOR CONVERGENCE MOVE TOWARDS/ACROSS AREA SATURDAY
NIGHT/SUNDAY.

WILL NOT STRAY TOO FAR FROM GUIDANCE NUMBERS.

MCI BT 048/067 046/063 045 99414

MJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 9:44 PM CDT	Severe Thunderstorm Warning	EAX	Cooper	31 min
Apr 18, 9:55 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette	35 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.