Alert archive / Missouri / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 13, NWS St. Louis, MO

April 4, 2010Audrain County, Boone County, Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 4, 2010, 9:29 PM CDT for Audrain County, Boone County, Callaway County, Missouri. It was in force for 46 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 4, 2010, 9:29 PM CDT (02:29 UTC)
Expired: Apr 4, 2010, 10:15 PM CDT
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Audrain County, MO, Boone County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 02:32 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
Apr 4, 10:05 PM CDT	HAIL 0.7	3 Ese Carrington, MO
Apr 4, 10:06 PM CDT	TSTM WND GST 50	1 Sw Fulton, MO
Apr 4, 10:06 PM CDT	HAIL 0.25	1 Sw Fulton, MO
Apr 4, 10:10 PM CDT	HAIL 1.75	2 S Fulton, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 4, 3:34 PM CDT	Tornado Watch	SPC	8 hr
Apr 4, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.5 hours before the alert went out and 287 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: 1337 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 971 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

354 
WUUS53 KLSX 050229
SVRLSX
MOC007-019-027-050315-
/O.NEW.KLSX.SV.W.0013.100405T0229Z-100405T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
929 PM CDT SUN APR 4 2010

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL AUDRAIN COUNTY IN CENTRAL MISSOURI...
  EAST CENTRAL BOONE COUNTY IN CENTRAL MISSOURI...
  NORTHERN CALLAWAY COUNTY IN CENTRAL MISSOURI...

* UNTIL 1015 PM CDT

* AT 928 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  SOUTHWEST OF AUXVASSE...OR 9 MILES NORTHWEST OF FULTON...AND MOVING
  EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FULTON...AUXVASSE...SHAMROCK...WILLIAMSBURG...KINGDOM CITY AND
  REFORM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR SOUTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.

LAT...LON 3909 9165 3873 9166 3885 9227 3913 9210
TIME...MOT...LOC 0229Z 285DEG 24KT 3897 9201
WIND...HAIL 60MPH 1.00IN

$$

CARNEY

1 follow-up statement

100 
WWUS53 KLSX 050252
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
952 PM CDT SUN APR 4 2010

MOC007-019-050302-
/O.CAN.KLSX.SV.W.0013.000000T0000Z-100405T0315Z/
BOONE MO-AUDRAIN MO-
952 PM CDT SUN APR 4 2010

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL AUDRAIN AND EAST
CENTRAL BOONE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3907 9192 3906 9165 3873 9166 3885 9210
TIME...MOT...LOC 0252Z 283DEG 26KT 3894 9179

$$

MOC027-050315-
/O.CON.KLSX.SV.W.0013.000000T0000Z-100405T0315Z/
CALLAWAY MO-
952 PM CDT SUN APR 4 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
CALLAWAY COUNTY UNTIL 1015 PM CDT...

AT 949 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTHEAST OF AUXVASSE...OR 10 MILES NORTHEAST OF FULTON...MOVING EAST
AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  SHAMROCK...WILLIAMSBURG AND REFORM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3907 9192 3906 9165 3873 9166 3885 9210
TIME...MOT...LOC 0252Z 283DEG 26KT 3894 9179
WIND...HAIL 60MPH 1.00IN

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:16 PM CDT	Tornado Warning	LSX	Audrain, Boone, Monroe	44 min
Apr 4, 7:55 PM CDT	Tornado Warning	LSX	Audrain, Monroe, Ralls	35 min
Apr 4, 8:19 PM CDT	Tornado Warning	LSX	Lincoln, Pike	41 min
Apr 4, 8:23 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	37 min
Apr 4, 8:43 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	47 min
Apr 4, 8:55 PM CDT	Tornado Warning	LSX	Lincoln, Pike	35 min
Apr 4, 8:57 PM CDT	Tornado Warning	LSX	Audrain, Montgomery	33 min
Apr 4, 9:56 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	34 min
Apr 4, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	42 min
Apr 4, 10:18 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	27 min
Apr 4, 10:41 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	34 min
Apr 4, 11:25 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	35 min
Apr 5, 11:59 AM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	31 min
Apr 5, 12:30 PM CDT	Severe Thunderstorm Warning	LSX	Pike	30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2010 Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.