Alert archive / Illinois / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 48, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 30, 2016, 7:43 PM CDT for Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, Missouri. It was in force for 47 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
- Apr 30, 2016, 7:43 PM CDT (00:43 UTC)
- Expired
- Apr 30, 2016, 8:30 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Monroe County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 00:43 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 |
|---|---|---|---|
| Apr 30, 7:50 PM CDT | HAIL 0.7 | House Springs, MO | |
| Apr 30, 7:53 PM CDT | HAIL 0.7 | Lemay, MO | |
| Apr 30, 7:54 PM CDT | HAIL 0.7 | Hillsboro, MO | |
| Apr 30, 8:20 PM CDT | HAIL 1 | 2 Ssw Imperial, MO | |
| Apr 30, 8:27 PM CDT | HAIL 0.7 | Columbia, IL |
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 |
|---|---|---|---|
| Apr 30, 3:59 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 239 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
- 481 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 618 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted.
409
WUUS53 KLSX 010043
SVRLSX
ILC133-163-MOC099-189-010130-
/O.NEW.KLSX.SV.W.0048.160501T0043Z-160501T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
743 PM CDT SAT APR 30 2016
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
SOUTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 830 PM CDT
* AT 743 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HOUSE
SPRINGS...MOVING EAST AT 20 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
* LOCATIONS IMPACTED INCLUDE...
BELLEVILLE...EAST ST. LOUIS...ARNOLD...CAHOKIA...FESTUS...WATERLOO...
COLUMBIA...SUNSET HILLS...DE SOTO...PEVELY...CENTREVILLE...CRYSTAL CITY...
WASHINGTON PARK...DUPO...FENTON...MILLSTADT...HERCULANEUM...HILLSBORO...
BYRNES MILL AND LAKESHIRE.
THIS INCLUDES INTERSTATE 55 IN MISSOURI BETWEEN EXITS 174 AND 191.
THIS ALSO INCLUDES MASTODON HISTORIC SITE...SANDY CREEK COVERED
BRIDGE HISTORIC SITE...AND GOV. DUNKLIN'S GRAVE HISTORIC SITE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS!
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3822 9003 3822 9004 3813 9070 3845 9071
3856 9030 3855 9027 3853 9027 3853 9026
3857 9023 3859 9020 3862 9009 3823 8995
TIME...MOT...LOC 0043Z 268DEG 17KT 3837 9057
HAIL...1.00IN
WIND...<50MPH
$$
GKS1 follow-up statement
199
WWUS53 KLSX 010102
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
802 PM CDT SAT APR 30 2016
ILC133-163-MOC099-189-010130-
/O.CON.KLSX.SV.W.0048.000000T0000Z-160501T0130Z/
ST. CLAIR IL-MONROE IL-ST. LOUIS MO-JEFFERSON MO-
802 PM CDT SAT APR 30 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR WESTERN ST. CLAIR...MONROE...SOUTH CENTRAL ST. LOUIS AND CENTRAL
JEFFERSON COUNTIES...
AT 802 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ANTONIA...MOVING
EAST AT 20 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
LOCATIONS IMPACTED INCLUDE...
BELLEVILLE...EAST ST. LOUIS...ARNOLD...CAHOKIA...FESTUS...WATERLOO...
COLUMBIA...SUNSET HILLS...DE SOTO...PEVELY...CENTREVILLE...CRYSTAL CITY...
WASHINGTON PARK...DUPO...FENTON...MILLSTADT...HERCULANEUM...HILLSBORO...
BYRNES MILL AND LAKESHIRE.
THIS ALSO INCLUDES MASTODON HISTORIC SITE...SANDY CREEK COVERED
BRIDGE HISTORIC SITE...AND GOV. DUNKLIN'S GRAVE HISTORIC SITE.
THIS INCLUDES INTERSTATE 55 IN MISSOURI BETWEEN EXITS 174 AND 191.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3822 9003 3822 9004 3813 9070 3841 9061
3856 9030 3855 9027 3853 9027 3853 9026
3857 9023 3859 9020 3862 9009 3823 8995
TIME...MOT...LOC 0102Z 262DEG 19KT 3836 9047
HAIL...1.00IN
WIND...<50MPH
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:25 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 50 min |
| Apr 30, 8:09 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 51 min |
| Apr 30, 8:25 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 50 min |
| Apr 30, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 44 min |
| Apr 30, 9:56 PM CDT | Areal Flood Advisory | LSX | Monroe | 3 hr |
| May 1, 6:39 PM CDT | Special Weather Statement | LSX | Fayette | 51 min |
| May 1, 6:58 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 29 min |
| Apr 30, 7:02 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 43 min |
| Apr 30, 7:41 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Iron, Washington | 49 min |
| Apr 30, 8:34 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Iron, Washington | 41 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.