Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 109, NWS Kansas City, MO

July 13, 1997Atchison County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 13, 1997, 8:35 PM CDT for Atchison County, Missouri. It was in force for 40 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
Jul 13, 1997, 8:35 PM CDT (01:35 UTC)
Expired
Jul 13, 1997, 9:15 PM CDT
In force
40 min
Issued by
NWS Kansas City, MO
Area
Whole counties

County Atchison County, MO

The radar

The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 01:38 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 13, 6:45 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.6 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, Omaha, NE at 00:00Z on 1997-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3653 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 1997-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.193958Sfc1 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
3653 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1268 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 140140 RRB
SVRMCI
MOC005-140215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED FOR COUNTY WARNED
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
835 PM CDT SUN JUL 13 1997

* SEVERE THUNDERSTORM WARNING FOR
    ATCHISON COUNTY - NORTHWEST MISSOURI
 
* UNTIL 915 PM CDT

* SOME LOCATIONS AFFECTED
    ROCKPORT BY 845 PM
    TARKIO BY 855 PM
    WESTBORO BY 905 PM

* AT 835 PM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 10 MILES NORTHWEST OF ROCKPORT MOVING EAST AT 20 MPH.

PEOPLE IN THE PATH OF THIS STORM CAN EXPECT HAIL TO 1 INCH IN
DIAMETER OR LARGER AND DAMAGING WIND GUSTS OF 60 MPH OR HIGHER.

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

JULY

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 Jul 13, 2:25 PM CDT, 6 hours 10 minutes earlier.

Area forecast discussion, Jul 13, 2:25 PM CDT, 6 hours 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
210 PM CDT SUN JUL 13 1997

MAIN FCST CONCERN IS CHC OF TRW TNGT AND EARLY MON. CDFNT MVG
SLOWLY EAST ACR ERN NEB AND NCNTRL KS WITH OAX/TOP MODIFIED
SOUNDINGS YIELDINGS LIFTED INDICES BTWN -8 TO -12 WITH CAPE VALUES
FROM 4500-6000 J/KG. H8-H7 CAP STILL KEEPING LID ON CONVECTION BUT
AS PER MODIFIED SOUNDINGS...CAP ABOUT TO BREAK IN ERN NEB JUST AHD
OF FNT. ALL MDL GRIDDS SHOW CAP TO WEAKEN TNGT AS FNT ENTERS NWRN
MO. BLV ETA HAS BEST HANDLE ON INSTABILITY WITH GRIDDS INDICATING
CAPE VALUES BTWN 3000-4000 J/KG TNGT AHD OF FNT. BEST CHC OF TRW
TNGT IS ACR XTRM NWRN MO WITH BETTER SHR PROFILER AHD OF UPR TROF
OVR WRN DAKOTAS. A FEW OF THESE STORMS MAY BE SEVERE WITH LARGE
HAIL AND DAMAGING WINDS.

DESPITE WEAK SHR PROFILE...MODERATE INSTABILITY WL LIKELY MAINTAIN
SCT TRW THROUGH MUCH OF NGT. RISK OF SVR DIMINISHES AFT MIDNIGHT
DUE TO WEAK WIND PROFILES AND WEAKER INSTABILITY. COVERAGE SHOULD
ALSO DECREASE WITH LOWEST POPS ACR SRN ZONES. A FEW TRW MAY ALSO
LINGER MON MORNING IN SRN ZONES IN PROXIMITY OF THE FRONT.

LTL COOLING ASSCD WITH FNT BUT LO LVL DRYING WL MAKE FOR A MORE
COMFORTABLE DAY. LGT WNDS...CLR SKIES AND DRY AIR MASS WL ALLOW FOR
GOOD RAD COOLING MON NGT. TEMPS A LTL WARMER ON TUES AS UPR RDG
BUILDS TOWARD THE AREA. FWC GUID TEMPS LOOK GOOD.

.EAX...NONE.

DB

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.