Alert archive / Missouri / Tornado Warnings in 1998

Tornado Warning 28, NWS St. Louis, MO

April 15, 1998Franklin County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 15, 1998, 4:06 PM CDT for Franklin County, Missouri. It was in force for 49 min. 7 reports 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 15, 1998, 4:06 PM CDT (21:06 UTC)
Expired: Apr 15, 1998, 4:55 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Franklin County, MO

The radar

The St Louis radar (KLSX), 47 km from the middle of the area, began a volume at 21:08 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 15, 4:14 PM CDT	Hail 0.75	St Clair, MO
Apr 15, 4:20 PM CDT	Hail 1	St Clair, MO
Apr 15, 4:25 PM CDT	Hail 1	Gerald, MO	Spotters reported 1 inch hail.
Apr 15, 4:38 PM CDT	Hail 1.75	Stanton, MO	Spotters reported golfball size hail.
Apr 15, 4:42 PM CDT	Hail 0.75	Catawissa, MO	Spotters reported 3/4 inch hail.
Apr 15, 4:44 PM CDT	Hail 2.75	Lonedell, MO	Baseball size hail was reported in the Lonedel/Luebbering area. Wind-blown hail knocked holes in siding on homes, broke windows and windshields and dented cars.
Apr 15, 4:47 PM CDT	Hail 1.75	Robertsville, MO	Hail up to golfball size fell in Robertsville.

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 15, 1:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.1 hours before the alert went out and 288 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 459 m²/s²
0-3 km storm-relative helicity: 751 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.

993 
WFUS1 KSTL 152107 RRA
TORSTL
MOC071-152155-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
406 PM CDT WED APR 15 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 455 PM CDT

* AT 400 PM CDT... SEVERE STORM SPOTTERS INDICATED A TORNADO JUST
  SOUTH OF OWENSVILLE... MOVING EAST AT 25 MPH.

* LOCATIONS IN THE PATH...
  RURAL AREAS IN SOUTHERN FRANKLIN COUNTY

LARGE HAIL WAS ALSO REPORTED WITH THIS STORM NEAR BLAND AND
OWENSVILLE.

A TORNADO IS ON THE GROUND IN YOU ARE IN THE PATH...MOVE
IMMEDIATELY TO A SUBSTANTIAL STRUCTURE NOW FOR PROTECTION. A
BASEMENT OFFERS THE BEST SHELTER. YOUR LIFE AND THE LIVES OF THOSE
AROUND YOU MAY DEPEND ON YOUR ACTIONS.

PEDIGO


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:11 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	44 min
Apr 15, 2:43 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	47 min
Apr 15, 3:26 PM CDT	Tornado Warning	LSX	Franklin, Gasconade	49 min
Apr 15, 3:52 PM CDT	Severe Thunderstorm Warning	LSX	Osage	48 min
Apr 15, 4:25 PM CDT	Tornado Warning	LSX	Jefferson	65 min
Apr 15, 6:24 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	61 min

Nearby

Tornado Warnings in Missouri, 1998 Every tornado warning in 1998 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.