Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 147, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 4, 2012, 8:22 AM CDT for Audrain County, Callaway County, Montgomery County, Missouri. It was in force for 38 min. 2 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
- May 4, 2012, 8:22 AM CDT (13:22 UTC)
- Expired
- May 4, 2012, 9:00 AM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Audrain County, MO, Callaway County, MO, Montgomery County, MO
The radar
The St Louis radar (KLSX), 98 km from the middle of the area, began a volume at 13:21 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 |
|---|---|---|---|
| May 4, 8:52 AM CDT | HAIL 0.7 | 1 Se Kingdom City, MO | |
| May 4, 8:59 AM CDT | HAIL 0.25 | Williamsburg, MO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 1.4 hours before the alert went out and 294 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
- 1160 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
034 WUUS53 KLSX 041322 SVRLSX MOC007-027-139-041400- /O.NEW.KLSX.SV.W.0147.120504T1322Z-120504T1400Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 822 AM CDT FRI MAY 4 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN AUDRAIN COUNTY IN CENTRAL MISSOURI... NORTHERN CALLAWAY COUNTY IN CENTRAL MISSOURI... MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 900 AM CDT * AT 821 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR AUXVASSE... AND MOVING EAST AT 45 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. * LOCATIONS IMPACTED INCLUDE... WELLSVILLE...AUXVASSE...SHAMROCK...WILLIAMSBURG...MARTINSBURG... MINEOLA...KINGDOM CITY AND BENTON CITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && LAT...LON 3915 9147 3886 9157 3896 9207 3916 9201 TIME...MOT...LOC 1323Z 281DEG 39KT 3904 9193 HAIL...1.00IN WIND...<50 MPH $$ CARNEY
1 follow-up statement
508 WWUS53 KLSX 041340 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 840 AM CDT FRI MAY 4 2012 MOC007-027-139-041400- /O.CON.KLSX.SV.W.0147.000000T0000Z-120504T1400Z/ CALLAWAY MO-MONTGOMERY MO-AUDRAIN MO- 840 AM CDT FRI MAY 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN AUDRAIN...MONTGOMERY AND NORTHERN CALLAWAY COUNTIES UNTIL 900 AM CDT... AT 835 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR AUXVASSE...AND MOVING SOUTHEAST AT 25 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. LOCATIONS IMPACTED INCLUDE... WELLSVILLE...MARTINSBURG...SHAMROCK...WILLIAMSBURG AND MINEOLA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && LAT...LON 3915 9147 3886 9157 3896 9207 3916 9201 TIME...MOT...LOC 1340Z 302DEG 21KT 3901 9183 HAIL...1.00IN WIND...<50 MPH $$ CARNEY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:07 PM CDT | River Flood Warning | LSX | Lewis | 23 hr |
| May 4, 8:33 AM CDT | Severe Thunderstorm Warning | LSX | Callaway | 27 min |
| May 4, 8:52 AM CDT | Areal Flood Advisory | LSX | Audrain | 5 hr |
| May 4, 8:54 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery | 25 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 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.