Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 157, NWS St. Louis, MO

May 22, 1998Crawford County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 22, 1998, 5:55 PM CDT for Crawford County, Missouri. It was in force for 50 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
May 22, 1998, 5:55 PM CDT (22:55 UTC)
Expired
May 22, 1998, 6:45 PM CDT
In force
50 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Crawford County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 22:57 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
May 22, 5:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.9 hours before the alert went out and 251 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, Springfield, MO at 12:00Z on 1998-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1863 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, Springfield, MO at 12:00Z on 1998-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 419 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
1863 J/kg
Mixed-layer CIN
-309 J/kg
Mixed-layer LCL
1601 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
419 m²/s²
0-3 km storm-relative helicity
430 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.

000 
TTAA00 KSTL 222255 RRA
SVRSTL
MOC055-222345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
555 PM CDT FRI MAY 22 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN CENTRAL MISSOURI

* UNTIL 645 PM CDT

* AT 552 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES WEST OF STEELVILLE ... MOVING EAST AT
  40 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  STEELVILLE BETWEEN 605 AND 615 PM.

THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN
CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT
OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

GKS/RP

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.

In the hours before

Local storm report, May 22, 12:25 PM CDT, 5 hours 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
1225 PM CDT FRI MAY 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0855 AM    WHITE HALL                IL   WIND DAMAGE
05/22/98   GREENE                         TREES AND POWER LINES DOWN
                                          AND 1 UTILITY SHED BLOWN
                                          OVER
Local storm report, May 22, 12:25 PM CDT, 5 hours 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
1225 PM CDT FRI MAY 22 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0855 AM    WHITE HALL                IL   WIND DAMAGE
05/22/98   GREENE                         TREES AND POWER LINES DOWN
                                          AND 1 UTILITY SHED BLOWN
                                          OVER

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 7:12 PM CDTSevere Thunderstorm WarningLSXMadison48 min
May 22, 12:40 AM CDTSevere Thunderstorm WarningLSXScotland60 min
May 22, 1:04 AM CDTSevere Thunderstorm WarningLSXKnox61 min
May 22, 1:20 AM CDTSevere Thunderstorm WarningLSXLincoln65 min
May 22, 1:27 AM CDTSevere Thunderstorm WarningLSXClark, Lewis63 min
May 22, 1:52 AM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis63 min
May 22, 1:57 AM CDTSevere Thunderstorm WarningLSXMarion, Shelby63 min
May 22, 2:34 AM CDTSevere Thunderstorm WarningLSXRalls61 min
May 22, 2:48 AM CDTSevere Thunderstorm WarningLSXPike62 min
May 22, 5:01 PM CDTSevere Thunderstorm WarningLSXOsage49 min
May 22, 5:25 PM CDTSevere Thunderstorm WarningLSXGasconade45 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1998Every severe thunderstorm warning in 1998

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.