Alert archive / Illinois / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 41, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 30, 2016, 6:37 PM CDT for Calhoun County, Jersey County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 38 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 30, 2016, 6:37 PM CDT (23:37 UTC)
- Expired
- Apr 30, 2016, 7:15 PM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Calhoun County, IL, Jersey County, IL, Madison County, IL, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 37 km from the middle of the area, began a volume at 23:39 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 30, 3:59 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.6 hours before the alert went out and 204 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
- 464 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 253 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
975 WUUS53 KLSX 302337 SVRLSX ILC013-083-119-MOC183-189-010015- /O.NEW.KLSX.SV.W.0041.160430T2337Z-160501T0015Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 637 PM CDT SAT APR 30 2016 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS... SOUTHEASTERN JERSEY COUNTY IN SOUTHWESTERN ILLINOIS... SOUTHEASTERN CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS... NORTH CENTRAL ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI... NORTHEASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 715 PM CDT * AT 636 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ORCHARD FARMS...MOVING NORTHEAST AT 35 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. * LOCATIONS IMPACTED INCLUDE... ST. CHARLES...FLORISSANT...ALTON...HAZELWOOD...GODFREY...BRIDGETON... JERSEYVILLE...GRAFTON...ELSAH...WEST ALTON...PORTAGE DES SIOUX...ORCHARD FARMS...OTTERVILLE...DEER PLAIN...DELHI AND MCCLUSKY. THIS ALSO INCLUDES PERE MARQUETTE STATE PARK. 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 3879 9047 3895 9057 3921 9026 3892 9009 TIME...MOT...LOC 2336Z 245DEG 32KT 3891 9043 HAIL...1.00IN WIND...<50MPH $$ GKS
1 follow-up statement
545 WWUS53 KLSX 302351 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 651 PM CDT SAT APR 30 2016 ILC013-083-119-MOC183-189-010015- /O.CON.KLSX.SV.W.0041.000000T0000Z-160501T0015Z/ MADISON IL-JERSEY IL-CALHOUN IL-ST. LOUIS MO-ST. CHARLES MO- 651 PM CDT SAT APR 30 2016 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHWESTERN MADISON...SOUTHEASTERN JERSEY AND SOUTHEASTERN CALHOUN COUNTIES IN SOUTHWESTERN ILLINOIS...NORTH CENTRAL ST. LOUIS AND NORTHEASTERN ST. CHARLES COUNTIES IN EAST CENTRAL MISSOURI... AT 651 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PORTAGE DES SIOUX...MOVING EAST AT 30 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. LOCATIONS IMPACTED INCLUDE... ST. CHARLES...FLORISSANT...ALTON...HAZELWOOD...GODFREY...BRIDGETON... JERSEYVILLE...GRAFTON...ELSAH...WEST ALTON...PORTAGE DES SIOUX...ORCHARD FARMS...OTTERVILLE...DEER PLAIN...DELHI AND MCCLUSKY. THIS ALSO INCLUDES PERE MARQUETTE STATE PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3879 9047 3895 9057 3921 9026 3892 9009 TIME...MOT...LOC 2351Z 251DEG 25KT 3894 9034 HAIL...1.00IN WIND...<50MPH $$ GKS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 4:53 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 52 min |
| Apr 30, 5:08 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 17 min |
| Apr 30, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 41 min |
| Apr 30, 6:38 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 52 min |
| Apr 30, 6:41 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 49 min |
| Apr 30, 6:48 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 42 min |
| Apr 30, 10:21 AM CDT | River Flood Warning | LSX | Franklin, Warren | 3 days |
| Apr 30, 10:21 AM CDT | River Flood Warning | LSX | Saint Charles, Saint Louis | 3 days |
Nearby
Severe Thunderstorm Warnings in Illinois, 2016Severe Thunderstorm Warnings in Missouri, 2016Every severe thunderstorm warning in 2016
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.