Alert archive / Missouri / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 490, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 12, 2011, 4:44 PM CDT for 8 counties in Missouri. It was in force for 46 min. 5 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
- Aug 12, 2011, 4:44 PM CDT (21:44 UTC)
- Expired
- Aug 12, 2011, 5:30 PM CDT
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Crawford County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 116 km from the middle of the area, began a volume at 21:45 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 |
|---|---|---|---|
| Aug 12, 4:58 PM CDT | TSTM WND DMG | 1 N Leadington, MO | NUMEROUS TREE LIMBS BLOWN DOWN...SO OF WHICH WERE SIX INCHES IN DIAMETER. |
| Aug 12, 5:00 PM CDT | TSTM WND DMG | 4 E Ironton, MO | LOTS OF TWO TO THREE INCH TREE LIMBS BLOWN DOWN...ONE SIX INCH TREE LIMB BLOWN DOWN AT LAKE KILLARNEY. |
| Aug 12, 5:00 PM CDT | TSTM WND GST 65 | 4 E Ironton, MO | ESTIMATED 65 TO 70 MPH WINDS...NO DAMAGE SO FAR. |
| Aug 12, 5:08 PM CDT | TSTM WND GST 50 | Farmington, MO | ESTIMATED 40 TO 50 MPH. |
| Aug 12, 5:23 PM CDT | TSTM WND DMG | 1 Sw Weingarten, MO | SEVERAL LARGE TREES BLOWN DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 9.7 hours before the alert went out and 263 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.
- Mixed-layer CAPE
- 196 J/kg
- Mixed-layer CIN
- -283 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
513
WUUS53 KLSX 122144
SVRLSX
MOC055-093-099-123-179-186-187-221-122230-
/O.NEW.KLSX.SV.W.0490.110812T2144Z-110812T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
444 PM CDT FRI AUG 12 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
IRON COUNTY IN SOUTHEAST MISSOURI...
SOUTH CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN MADISON COUNTY IN SOUTHEAST MISSOURI...
NORTHERN REYNOLDS COUNTY IN SOUTHEAST MISSOURI...
STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 530 PM CDT
* AT 441 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 7 MILES SOUTH OF OLYMPIAN VILLAGE TO BELLEVIEW TO 8 MILES WEST
OF VIBURNUM...AND MOVING SOUTHEAST AT 25 MPH. PENNY SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.
* LOCATIONS IMPACTED INCLUDE...
LEADWOOD...DESLOGE...BISMARCK...IRONTON...FARMINGTON...BIXBY...
BELLEVIEW...PARK HILLS...IRON MOUNTAIN...PILOT KNOB...OATES...ROCKY
RIDGE...ARCADIA...WEINGARTEN...ROSELLE...KNOB LICK...GLOVER...
COFFMAN...FRANKCLAY AND FRENCH VILLAGE.
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 3759 9127 3759 9116 3769 9116 3770 9118
3770 9131 3770 9132 3776 9131 3778 9089
3815 9046 3781 9007 3744 9050 3741 9106
TIME...MOT...LOC 2145Z 318DEG 20KT 3801 9045 3771 9080
3769 9126
WIND...HAIL 60MPH 0.75IN
$$
GKS1 follow-up statement
907
WWUS53 KLSX 122204
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
504 PM CDT FRI AUG 12 2011
MOC055-093-099-123-179-186-187-221-122230-
/O.CON.KLSX.SV.W.0490.000000T0000Z-110812T2230Z/
CRAWFORD MO-IRON MO-JEFFERSON MO-MADISON MO-REYNOLDS MO-
STE. GENEVIEVE MO-ST. FRANCOIS MO-WASHINGTON MO-
504 PM CDT FRI AUG 12 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
WASHINGTON...ST. FRANCOIS...STE. GENEVIEVE...NORTHERN REYNOLDS...
NORTHWESTERN MADISON...SOUTH CENTRAL JEFFERSON...IRON AND
SOUTHEASTERN CRAWFORD COUNTIES UNTIL 530 PM CDT...
AT 502 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 8 MILES WEST OF ROCKY RIDGE TO IRONTON TO 6 MILES SOUTHWEST OF
BIXBY...MOVING SOUTHEAST AT 30 MPH. PENNY SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.
LOCATIONS IMPACTED INCLUDE...
IRONTON...FARMINGTON...ARCADIA...OATES...ROCKY RIDGE...ROSELLE...
WEINGARTEN...GLOVER...KNOB LICK...COFFMAN...DOE RUN...BLACK...
HOGAN...CHLORIDE...LESTERVILLE...LIBERTYVILLE AND CENTERVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3759 9127 3759 9116 3769 9116 3770 9118
3770 9131 3770 9132 3776 9131 3778 9089
3815 9046 3781 9007 3744 9050 3741 9106
TIME...MOT...LOC 2204Z 318DEG 20KT 3795 9037 3758 9068
3761 9117
WIND...HAIL 60MPH 0.75IN
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:22 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 38 min |
| Aug 12, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Sainte Genevieve, Saint Francois | 50 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.