Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 28, NWS St. Louis, MO

April 9, 2001Pike County, Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 9, 2001, 9:29 PM CDT for Pike County, Ralls County, Missouri. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Apr 9, 2001, 9:29 PM CDT (02:29 UTC)
Expired: Apr 9, 2001, 10:15 PM CDT
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 101 km from the middle of the area, began a volume at 02:29 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.

Issued	Product	Office	Lasted
Apr 9, 6:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.5 hours before the alert went out and 253 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: 1891 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2017 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

803 
WUUS53 KLSX 100230
SVRSTL
MOC163-173-100315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
929 PM CDT MON APR 9 2001

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PIKE COUNTY IN NORTHEAST MISSOURI
  SOUTHERN RALLS COUNTY IN NORTHEAST MISSOURI

* UNTIL 1015 PM CDT

* AT 929 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES SOUTHWEST OF SPENCERBURG...MOVING EAST
  AT 40 MPH.

* LOCATIONS IN THE PATH...
  CURRYVILLE
  SPENCERBURG
  FRANKFORD
  BOWLING GREEN
  LOUISIANA

AT 925 PM CDT LAW ENFORCEMENT REPORTED NICKEL SIZED HAIL IN 
VANDALIA. 

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO 
AREAS WHERE WATER COVERS THE ROAD.

&

LAT...LON 3939 9168 3927 9146 3937 9090 3968 9129

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	49 min
Apr 9, 8:35 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	40 min
Apr 9, 8:44 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	46 min
Apr 9, 8:56 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	49 min
Apr 9, 8:59 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	46 min
Apr 9, 9:19 PM CDT	Severe Thunderstorm Warning	LSX	Warren	41 min
Apr 9, 9:34 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	26 min
Apr 9, 9:35 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	40 min
Apr 9, 9:43 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	47 min
Apr 9, 10:06 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	39 min
Apr 9, 10:18 PM CDT	Tornado Warning	LSX	Washington	42 min
Apr 9, 10:46 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	44 min
Apr 10, 1:18 AM CDT	Severe Thunderstorm Warning	LSX	Boone	42 min
Apr 10, 1:55 AM CDT	Severe Thunderstorm Warning	LSX	Audrain	50 min
Apr 10, 2:29 AM CDT	Severe Thunderstorm Warning	LSX	Pike	46 min
Apr 10, 4:24 AM CDT	Severe Thunderstorm Warning	LSX	Pike	36 min
Apr 10, 6:26 PM CDT	Tornado Warning	LSX	Boone, Moniteau	64 min
Apr 10, 6:56 PM CDT	Tornado Warning	LSX	Callaway	64 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2001 Every severe thunderstorm warning in 2001

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.