Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 170, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 4, 2012, 4:38 PM CDT for Jefferson County, Saint Louis County, Missouri; Monroe County, Illinois. It was in force for 52 min. 19 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
- Jun 4, 2012, 4:38 PM CDT (21:38 UTC)
- Expired
- Jun 4, 2012, 5:30 PM CDT
- In force
- 52 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Monroe County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 34 km from the middle of the area, began a volume at 21:41 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 |
|---|---|---|---|
| Jun 4, 4:38 PM CDT | HAIL 0.5 | Chesterfield, MO | AT INTERSECTION OF CLARKSON AND KEHRS MILL ROAD. |
| Jun 4, 4:40 PM CDT | HAIL 1 | Chesterfield, MO | |
| Jun 4, 4:41 PM CDT | HAIL 0.7 | Ellisville, MO | AT INTERSECTION OF CLARKSON AND MANCHESTER ROADS. |
| Jun 4, 4:41 PM CDT | HAIL 1.5 | Chesterfield, MO | RELAYED FROM FOX-2 FROM ONE OF THEIR METEOROLOGISTS ON LOCATION |
| Jun 4, 4:43 PM CDT | HAIL 1.75 | Ballwin, MO | INTERSECTION OF BIG BEND AND NEW BALLWIN. |
| Jun 4, 4:45 PM CDT | HAIL 0 | 1 S Ballwin, MO | *** 1 INJ *** REPORT OF A GIRL WITH ARM AND HEAD INJURIES CAUSED BY FALLING HAIL NEAR INTERSECTION OF BIG BEND AND RIES ROAD. |
| Jun 4, 4:45 PM CDT | HAIL 0.88 | Ballwin, MO | BIG BEND AND HIGHWAY 141. |
| Jun 4, 4:45 PM CDT | HAIL 1 | Ellisville, MO | |
| Jun 4, 4:48 PM CDT | HAIL 1.5 | Ballwin, MO | |
| Jun 4, 4:50 PM CDT | HAIL 0.25 | Manchester, MO | NEAR INTERSECTION OF BAXTER AND MANCHESTER ROADS. |
| Jun 4, 4:50 PM CDT | HAIL 1 | Manchester, MO | |
| Jun 4, 4:56 PM CDT | HAIL 1 | 2 N High Ridge, MO | |
| Jun 4, 4:59 PM CDT | HAIL 1.25 | 3 Nne High Ridge, MO | AT INTERSECTION OF BRIDLERIDGE CROSSING SPUR AND HILLSBORO ROAD. |
| Jun 4, 5:00 PM CDT | HAIL 0.88 | 1 E High Ridge, MO | |
| Jun 4, 5:04 PM CDT | HAIL 1.5 | High Ridge, MO | NEAR INTERSECTION OF W RIDGE ROAD AND ROCK CREEK ROAD. |
| Jun 4, 5:09 PM CDT | HAIL 0.5 | High Ridge, MO | |
| Jun 4, 5:09 PM CDT | HAIL 0.88 | House Springs, MO | |
| Jun 4, 5:10 PM CDT | HAIL 1.25 | 2 E House Springs, MO | |
| Jun 4, 5:10 PM CDT | HAIL 1.25 | 5 E House Springs, 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 |
|---|---|---|---|
| Jun 4, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 261 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1375 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
659
WUUS53 KLSX 042138
SVRLSX
ILC133-MOC099-189-042230-
/O.NEW.KLSX.SV.W.0170.120604T2138Z-120604T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
438 PM CDT MON JUN 4 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL MONROE COUNTY IN SOUTHWEST ILLINOIS...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
WESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 530 PM CDT
* AT 432 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
ELLISVILLE...AND MOVING SOUTH AT 35 MPH.
HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. UP TO GOLF BALL SIZE HAIL HAS
BEEN REPORTED ALONG I-64 AT BOONES CROSSING IN
CHESTERFIELD WITH THIS STORM.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
* LOCATIONS IMPACTED INCLUDE...
KIRKWOOD...VALLEY PARK...EUREKA...FENTON...SUNSET HILLS...MURPHY...
HIGH RIDGE...BYRNES MILL...CEDAR HILL...ARNOLD...ANTONIA...
BARNHART...PEVELY...HILLSBORO...HERCULANEUM...FESTUS...CRYSTAL
CITY...HOUSE SPRINGS...DITTMER AND VALMEYER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3822 9078 3845 9073 3864 9074 3869 9047
3818 9025
TIME...MOT...LOC 2136Z 341DEG 31KT 3856 9056
HAIL...1.75IN
WIND...60 MPH
$$
BRITT2 follow-up statements
095
WWUS53 KLSX 042151
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
451 PM CDT MON JUN 4 2012
ILC133-MOC099-189-042230-
/O.CON.KLSX.SV.W.0170.000000T0000Z-120604T2230Z/
MONROE IL-JEFFERSON MO-ST. LOUIS MO-
451 PM CDT MON JUN 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN ST.
LOUIS...NORTHERN JEFFERSON AND WEST CENTRAL MONROE COUNTIES UNTIL 530
PM CDT...
AT 445 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BALLWIN...AND
MOVING SOUTH AT 35 MPH.
HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. GOLF BALL SIZE HAIL HAS BEEN
REPORTED IN BALLWIN WITH THIS STORM.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE DAMAGE...
WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
MURPHY...HIGH RIDGE...BYRNES MILL...CEDAR HILL...ARNOLD...ANTONIA...
BARNHART...PEVELY...HILLSBORO...HERCULANEUM...FESTUS...CRYSTAL
CITY...HOUSE SPRINGS...DITTMER...VALMEYER...PARKDALE...SCOTSDALE...
OERMANN...OTTO AND MORSE MILL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3858 9067 3866 9046 3818 9025 3822 9075
TIME...MOT...LOC 2150Z 338DEG 32KT 3850 9053
HAIL...1.75IN
WIND...60 MPH
$$
BRITT052
WWUS53 KLSX 042207
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 PM CDT MON JUN 4 2012
MOC189-042214-
/O.CAN.KLSX.SV.W.0170.000000T0000Z-120604T2230Z/
ST. LOUIS MO-
507 PM CDT MON JUN 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN ST. LOUIS COUNTY
IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM.
LAT...LON 3822 9073 3847 9062 3850 9059 3850 9041
3848 9042 3846 9042 3845 9037 3818 9025
TIME...MOT...LOC 2204Z 338DEG 32KT 3840 9047
$$
ILC133-MOC099-042230-
/O.CON.KLSX.SV.W.0170.000000T0000Z-120604T2230Z/
MONROE IL-JEFFERSON MO-
507 PM CDT MON JUN 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
JEFFERSON AND WEST CENTRAL MONROE COUNTIES UNTIL 530 PM CDT...
AT 502 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ANTONIA...AND
MOVING SOUTH AT 35 MPH.
HAZARD...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. HALF DOLLAR SIZE HAIL HAS BEEN
REPORTED NEAR HIGH RIDGE WITH THIS STORM.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
ANTONIA...BARNHART...PEVELY...HILLSBORO...HERCULANEUM...FESTUS...
CRYSTAL CITY...VALMEYER...OTTO...KIMMSWICK...MAPAVILLE...
HARRISONVILLE AND CHALFIN BRIDGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3822 9073 3847 9062 3850 9059 3850 9041
3848 9042 3846 9042 3845 9037 3818 9025
TIME...MOT...LOC 2204Z 338DEG 32KT 3840 9047
HAIL...1.25IN
WIND...60 MPH
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 3:33 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 42 min |
| Jun 4, 4:08 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis | 37 min |
| Jun 4, 5:20 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 17 min |
| Jun 4, 2:57 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 48 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2012Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
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.