Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 160, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 20, 2012, 5:11 PM CDT for Calhoun County, Pike County, Illinois; Lincoln County, Pike County, Missouri. It was in force for 37 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
- May 20, 2012, 5:11 PM CDT (22:11 UTC)
- Expired
- May 20, 2012, 5:48 PM CDT
- In force
- 37 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Calhoun County, IL, Pike County, IL, Lincoln County, MO, Pike County, MO
The radar
The St Louis radar (KLSX), 77 km from the middle of the area, began a volume at 22:13 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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 219 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
- 616 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1773 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -67 m²/s²
- 0-3 km storm-relative helicity
- -55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
827 WUUS53 KLSX 202211 SVRLSX ILC013-149-MOC113-163-202300- /O.NEW.KLSX.SV.W.0160.120520T2211Z-120520T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 511 PM CDT SUN MAY 20 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALHOUN COUNTY IN SOUTHWEST ILLINOIS... SOUTH CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS... NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL MISSOURI... EASTERN PIKE COUNTY IN NORTHEAST MISSOURI... * UNTIL 600 PM CDT * AT 509 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHWEST OF EOLIA...AND MOVING EAST AT 20 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. * LOCATIONS IMPACTED INCLUDE... EOLIA...CLARKSVILLE...PLEASANT HILL...BELLEVIEW...PAYNESVILLE... ANNADA...MOZIER AND NEBO. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && LAT...LON 3950 9077 3924 9067 3918 9122 3939 9128 TIME...MOT...LOC 2212Z 261DEG 15KT 3930 9108 HAIL...1.00IN WIND...<50 MPH $$ GKS
2 follow-up statements
130 WWUS53 KLSX 202228 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 528 PM CDT SUN MAY 20 2012 ILC013-149-MOC113-163-202300- /O.CON.KLSX.SV.W.0160.000000T0000Z-120520T2300Z/ PIKE IL-CALHOUN IL-LINCOLN MO-PIKE MO- 528 PM CDT SUN MAY 20 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CALHOUN COUNTY IN SOUTHWEST ILLINOIS...AND SOUTH CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL MISSOURI...AND EASTERN PIKE COUNTY IN NORTHEAST MISSOURI UNTIL 600 PM CDT... AT 526 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHEAST OF EOLIA...AND MOVING EAST AT 25 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. LOCATIONS IMPACTED INCLUDE... CLARKSVILLE...PLEASANT HILL...BELLEVIEW...PAYNESVILLE...ANNADA...NEBO AND MOZIER. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS! && LAT...LON 3950 9077 3924 9067 3918 9122 3939 9128 TIME...MOT...LOC 2227Z 270DEG 29KT 3929 9092 HAIL...1.00IN WIND...<50 MPH $$ GKS
596 WWUS53 KLSX 202248 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 548 PM CDT SUN MAY 20 2012 ILC013-149-MOC113-163-202259- /O.CAN.KLSX.SV.W.0160.000000T0000Z-120520T2300Z/ PIKE IL-CALHOUN IL-LINCOLN MO-PIKE MO- 548 PM CDT SUN MAY 20 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN COUNTY IN SOUTHWEST ILLINOIS...AND SOUTH CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS... AND NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL MISSOURI...AND EASTERN PIKE COUNTY IN NORTHEAST MISSOURI IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 3950 9077 3924 9067 3918 9122 3939 9128 TIME...MOT...LOC 2249Z 270DEG 29KT 3929 9069 $$ GKS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 4:18 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin | 27 min |
| May 20, 5:06 PM CDT | Flash Flood Warning | LSX | Marion | 4 hr |
| May 20, 2:21 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 24 min |
| May 20, 2:49 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 19 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.