Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 70, NWS St. Louis, MO

April 19, 2011Callaway County, Gasconade County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 19, 2011, 3:26 AM CDT for Callaway County, Gasconade County, Osage County, Missouri. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 19, 2011, 3:26 AM CDT (08:26 UTC)
Expired: Apr 19, 2011, 4:15 AM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Callaway County, MO, Gasconade County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 96 km from the middle of the area, began a volume at 08:29 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 19, 3:11 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.4 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-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: 554 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

786 
WUUS53 KLSX 190826
SVRLSX
MOC027-073-151-190915-
/O.NEW.KLSX.SV.W.0070.110419T0826Z-110419T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
326 AM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL CALLAWAY COUNTY IN CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 415 AM CDT

* AT 326 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR FREEBURG...OR 16 MILES SOUTHWEST OF
  LINN...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LINN...OWENSVILLE...FREEBURG...WESTPHALIA...RICH FOUNTAIN...
  BLAND...MOUNT STERLING...CHAMOIS...ROSEBUD...DRAKE...LOOSE CREEK...
  FRANKENSTEIN...CANAAN...PORTLAND AND MORRISON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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 3832 9219 3882 9168 3877 9165 3871 9165
      3868 9158 3837 9137 3836 9137 3824 9165
      3828 9166 3829 9168 3828 9216
TIME...MOT...LOC 0827Z 233DEG 36KT 3827 9196
WIND...HAIL <50MPH 1.50IN

$$

TRUETT

1 follow-up statement

243 
WWUS53 KLSX 190842
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
342 AM CDT TUE APR 19 2011

MOC027-073-151-190915-
/O.CON.KLSX.SV.W.0070.000000T0000Z-110419T0915Z/
OSAGE MO-GASCONADE MO-CALLAWAY MO-
342 AM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
CALLAWAY...GASCONADE AND OSAGE COUNTIES UNTIL 415 AM CDT...

AT 338 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
THIS STORM WAS LOCATED NEAR FREEBURG...OR 10 MILES SOUTH OF LINN...
MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  LINN...OWENSVILLE...BLAND...MOUNT STERLING...CHAMOIS...ROSEBUD...
  DRAKE...FRANKENSTEIN...CANAAN...PORTLAND AND MORRISON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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 3832 9219 3882 9168 3877 9165 3871 9165
      3868 9158 3837 9137 3836 9137 3824 9165
      3828 9166 3829 9168 3828 9216
TIME...MOT...LOC 0842Z 233DEG 36KT 3836 9181
WIND...HAIL <50MPH 1.50IN

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 2:51 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau, Osage	39 min
Apr 19, 3:19 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	41 min
Apr 19, 3:39 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	21 min
Apr 19, 3:57 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 4 more	48 min
Apr 19, 4:35 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	40 min
Apr 19, 4:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Warren	47 min
Apr 19, 4:58 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	32 min
Apr 19, 5:23 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Saint Charles, Warren, Washington	37 min
Apr 19, 5:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	47 min
Apr 19, 6:21 AM CDT	Areal Flood Advisory	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	3 hr
Apr 19, 6:22 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson	38 min
Apr 19, 6:26 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	49 min
Apr 19, 7:08 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	37 min
Apr 19, 8:05 AM CDT	River Flood Warning	LSX	Saint Charles	30 hr
Apr 19, 11:06 AM CDT	River Flood Warning	LSX	Lincoln	19 days
Apr 19, 11:33 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	30 days
Apr 19, 3:46 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	44 min
Apr 19, 3:48 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike	42 min
Apr 19, 3:54 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Osage	51 min
Apr 19, 3:59 PM CDT	Tornado Warning	LSX	Pike	46 min
Apr 19, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Franklin, Gasconade, Osage	51 min
Apr 19, 4:31 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	44 min
Apr 19, 4:31 PM CDT	Tornado Warning	LSX	Pike	44 min
Apr 19, 4:41 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	49 min
Apr 19, 5:01 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	44 min
Apr 19, 5:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Saint Charles, Warren	47 min
Apr 19, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
Apr 19, 5:44 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	34 min
Apr 19, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	34 min
Apr 19, 5:58 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	32 min
Apr 19, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	48 min
Apr 19, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	31 min
Apr 19, 6:15 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	60 min
Apr 19, 6:30 PM CDT	Flash Flood Warning	LSX	Saint Charles	3 hr
Apr 19, 6:37 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Saint Francois, Washington	53 min
Apr 19, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles	30 min
Apr 19, 6:51 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	39 min
Apr 19, 6:56 PM CDT	Areal Flood Advisory	LSX	Franklin, Warren	5 hr
Apr 19, 6:56 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	64 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning in 2011

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.