Alert archive / Illinois / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 73, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2017, 3:24 PM CDT for 4 counties in Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 51 min. 13 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 29, 2017, 3:24 PM CDT (20:24 UTC)
- Expired
- Apr 29, 2017, 4:15 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 40 km from the middle of the area, began a volume at 20:23 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 29, 3:39 PM CDT | HAIL 1 | Bridgeton, MO | |
| Apr 29, 3:48 PM CDT | TSTM WND DMG | 4 Ese Elsah, IL | POWER LINE AND TREES DOWN ACROSS THE GREAT RIVER RD NEAR LOCKHAVEN RD, BLOCKING TRAFFIC IN BOTH DIRECTIONS. AMEREN ON SCENE NOW. |
| Apr 29, 3:50 PM CDT | TSTM WND DMG | 4 Ese Elsah, IL | THE NWS CONDUCTED A DAMAGE SURVEY OF THE PIASA MARINA WHERE DAMAGE OCCURRED TO SEVERAL BOAT DOCKS, AN UNOCCUPIED BUILDING, AND SOME SURROUNDING TREES. THE SURVEY CONCLUDED THIS DAMAGE WAS THE RESULT OF A MICROBURST WITH WINDS ESTIMATED AT 80-90 MPH. |
| Apr 29, 3:50 PM CDT | HAIL 0.5 | Florissant, MO | |
| Apr 29, 3:51 PM CDT | TSTM WND DMG | Florissant, MO | 1-FOOT DIAMETER TREE TOPPLED. |
| Apr 29, 3:57 PM CDT | HAIL 0.25 | Florissant, MO | PEA-SIZED HAIL. |
| Apr 29, 4:02 PM CDT | TORNADO | 2 W Miles Station, IL | A WEAK TORNADO CAUSED DAMAGE TO TREES AND THREE RESIDENCES NEAR THE JERSEY/MACOUPIN COUNTY BORDER. THE DAMAGE WAS RATED EF1 WITH MAXIMUM WINDS OF 90 MPH AND A WIDTH OF 50 YARDS. |
| Apr 29, 4:05 PM CDT | TSTM WND DMG | Alton, IL | NUMEROUS TREE LIMBS AND A FEW TREES TWISTED, UPROOTED AND BROKEN AROUND TOWN. |
| Apr 29, 4:05 PM CDT | HAIL 0.7 | Alton, IL | |
| Apr 29, 4:06 PM CDT | HAIL 0.25 | Alton, IL | |
| Apr 29, 4:08 PM CDT | TSTM WND DMG | 2 W Miles Station, IL | NUMEROUS TREE LIMBS DOWN AND A FEW TREES TWISTED AND BROKEN. POSSIBLE TORNADO. |
| Apr 29, 4:08 PM CDT | TSTM WND DMG | Brighton, IL | TREES/POWER LINES DOWN IN BRIGHTON AND MEDORA AREA. |
| Apr 29, 4:15 PM CDT | HAIL 0.5 | Fosterburg, IL |
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, 8.4 hours before the alert went out and 203 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
- 776 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 242 m²/s²
- 0-3 km storm-relative helicity
- 568 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144 WUUS53 KLSX 292024 SVRLSX ILC013-083-117-119-MOC183-189-510-292115- /O.NEW.KLSX.SV.W.0073.170429T2024Z-170429T2115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service St Louis MO 324 PM CDT SAT APR 29 2017 The National Weather Service in St Louis has issued a * Severe Thunderstorm Warning for... Southeastern Calhoun County in southwestern Illinois... Western Madison County in southwestern Illinois... Southwestern Macoupin County in southwestern Illinois... Jersey County in southwestern Illinois... Northern St. Louis City in east central Missouri... Northeastern St. Charles County in east central Missouri... Northeastern St. Louis County in east central Missouri... * Until 415 PM CDT. * At 323 PM CDT, severe thunderstorms were located along a line extending from near Winfield to Harvester to Ballwin, moving northeast at 50 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... St. Louis, St. Charles, Florissant, University City, Granite City, Alton, Maryland Heights, Hazelwood, Collinsville, Edwardsville, Ferguson, Godfrey, Creve Coeur, Overland, Clayton, Jennings, St. Ann, Glen Carbon, Bridgeton and Bellefontaine Neighbors. This includes Interstate 70 in Missouri near exit 231. This also includes Confluence State Park, Pere Marquette State Park, and Horseshoe Lake 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 these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3864 9042 3906 9059 3926 9009 3868 8985 TIME...MOT...LOC 2023Z 242DEG 44KT 3895 9070 3874 9058 3862 9054 HAIL...0.75IN WIND...60MPH $$ CVKING
3 follow-up statements
927
WWUS53 KLSX 292042
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
342 PM CDT SAT APR 29 2017
ILC013-083-117-119-MOC183-189-510-292115-
/O.CON.KLSX.SV.W.0073.000000T0000Z-170429T2115Z/
Calhoun IL-Madison IL-Macoupin IL-Jersey IL-St. Louis City MO-
St. Charles MO-St. Louis MO-
342 PM CDT SAT APR 29 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR SOUTHEASTERN CALHOUN...WESTERN MADISON...SOUTHWESTERN MACOUPIN
AND JERSEY COUNTIES IN SOUTHWESTERN ILLINOIS...NORTHEASTERN ST.
CHARLES AND NORTHEASTERN ST. LOUIS COUNTIES IN EAST CENTRAL MISSOURI
AND NORTHERN ST. LOUIS CITY...
At 341 PM CDT, severe thunderstorms were located along a line
extending from 8 miles southeast of Hardin to Florissant to
University City, moving northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters reported quarter size hail in
Bridgeton.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St. Louis, St. Charles, Florissant, University City, Granite City,
Alton, Maryland Heights, Hazelwood, Collinsville, Edwardsville,
Ferguson, Godfrey, Creve Coeur, Overland, Clayton, Jennings, St. Ann,
Glen Carbon, Bridgeton and Bellefontaine Neighbors.
This also includes Confluence State Park, Pere Marquette State Park,
and Horseshoe Lake State Park.
This includes Interstate 70 in Missouri near exit 231.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3906 9059 3926 9009 3868 8985 3864 9042
TIME...MOT...LOC 2041Z 245DEG 45KT 3906 9055 3882 9033 3868 9034
HAIL...1.00IN
WIND...60MPH
$$
CVKING642
WWUS53 KLSX 292050
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
350 PM CDT SAT APR 29 2017
ILC013-292059-
/O.CAN.KLSX.SV.W.0073.000000T0000Z-170429T2115Z/
Calhoun IL-
350 PM CDT SAT APR 29 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3909 9051 3926 9009 3868 8985 3864 9035
3889 9038
TIME...MOT...LOC 2049Z 242DEG 44KT 3909 9047 3885 9025 3871 9026
$$
ILC083-117-119-MOC183-189-510-292115-
/O.CON.KLSX.SV.W.0073.000000T0000Z-170429T2115Z/
Madison IL-Macoupin IL-Jersey IL-St. Louis City MO-St. Charles MO-
St. Louis MO-
350 PM CDT SAT APR 29 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR WESTERN MADISON...SOUTHWESTERN MACOUPIN AND JERSEY COUNTIES IN
SOUTHWESTERN ILLINOIS...NORTHEASTERN ST. CHARLES AND NORTHEASTERN ST.
LOUIS COUNTIES IN EAST CENTRAL MISSOURI AND NORTHERN ST. LOUIS
CITY...
At 349 PM CDT, severe thunderstorms were located along a line
extending from 7 miles west of Jerseyville to West Alton to Flordell
Hills, moving northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters observed quarter size hail in
Bridgeton and cars and boats were overturned in northern
St. Charles County north of Kampville.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St. Louis, Florissant, University City, Granite City, Alton,
Hazelwood, Collinsville, Edwardsville, Ferguson, Godfrey, Overland,
Clayton, Jennings, Glen Carbon, Bellefontaine Neighbors, Wood River,
Troy, Bethalto, Berkeley and Jerseyville.
This also includes Confluence State Park and Horseshoe Lake State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3909 9051 3926 9009 3868 8985 3864 9035
3889 9038
TIME...MOT...LOC 2049Z 242DEG 44KT 3909 9047 3885 9025 3871 9026
HAIL...1.00IN
WIND...60MPH
$$
CVKING276
WWUS53 KLSX 292106
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
406 PM CDT SAT APR 29 2017
MOC510-292116-
/O.CAN.KLSX.SV.W.0073.000000T0000Z-170429T2115Z/
St. Louis City MO-
406 PM CDT SAT APR 29 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ST. LOUIS CITY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 1000 PM CDT for
southwestern Illinois.
LAT...LON 3873 9021 3875 9018 3877 9018 3875 9019
3870 9027 3916 9034 3926 9009 3885 8992
TIME...MOT...LOC 2106Z 242DEG 44KT 3917 9028 3893 9006 3879 9007
$$
ILC083-117-119-MOC183-189-292115-
/O.CON.KLSX.SV.W.0073.000000T0000Z-170429T2115Z/
Madison IL-Macoupin IL-Jersey IL-St. Charles MO-St. Louis MO-
406 PM CDT SAT APR 29 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHWESTERN MADISON...SOUTHWESTERN MACOUPIN AND EASTERN JERSEY
COUNTIES IN SOUTHWESTERN ILLINOIS...NORTHEASTERN ST. CHARLES AND
NORTHEASTERN ST. LOUIS COUNTIES IN EAST CENTRAL MISSOURI...
At 406 PM CDT, severe thunderstorms were located along a line
extending from near Jerseyville to near Bethalto to South Roxana,
moving northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St. Louis, Granite City, Alton, Edwardsville, Ferguson, Godfrey,
Jennings, Bellefontaine Neighbors, Wood River, Bethalto, Jerseyville,
Black Jack, Dellwood, Madison, Riverview, Spanish Lake, East Alton,
Pine Lawn, Moline Acres and Brighton.
This also includes Confluence State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3873 9021 3875 9018 3877 9018 3875 9019
3870 9027 3916 9034 3926 9009 3885 8992
TIME...MOT...LOC 2106Z 242DEG 44KT 3917 9028 3893 9006 3879 9007
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 9:14 PM CDT | River Flood Warning | LSX | Fayette | 10 days |
| Apr 28, 9:36 PM CDT | River Flood Warning | LSX | Brown | 36 days |
| Apr 28, 9:36 PM CDT | River Flood Warning | LSX | Morgan, Pike | 36 days |
| Apr 28, 9:36 PM CDT | River Flood Warning | LSX | Pike, Scott | 40 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Adams | 20 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Adams | 19 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Adams | 10 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Pike | 20 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Calhoun | 43 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Madison | 40 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Saint Clair | 16 days |
| Apr 28, 10:18 PM CDT | River Flood Warning | LSX | Jackson, Randolph | 43 days |
| Apr 29, 12:41 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 49 min |
| Apr 29, 3:53 AM CDT | Flash Flood Warning | LSX | Randolph | 22 hr |
| Apr 29, 9:58 AM CDT | Special Weather Statement | LSX | Bond | 47 min |
| Apr 29, 2:53 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 52 min |
| Apr 29, 3:08 PM CDT | Flash Flood Warning | LSX | Adams, Calhoun, Pike | 8 hr |
| Apr 29, 3:56 PM CDT | Tornado Warning | LSX | Jersey, Macoupin, Madison | 16 min |
| Apr 29, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin, Madison, Montgomery | 42 min |
| Apr 29, 4:42 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Macoupin, Madison, Montgomery | 48 min |
| Apr 29, 5:16 PM CDT | River Flood Warning | LSX | Brown | 7 days |
| Apr 29, 5:20 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Montgomery | 8 hr |
| Apr 29, 5:29 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Marion, Montgomery | 61 min |
| Apr 28, 8:28 PM CDT | River Flood Warning | LSX | Cole | 7 days |
| Apr 28, 8:28 PM CDT | River Flood Warning | LSX | Osage | 9 days |
| Apr 28, 8:28 PM CDT | River Flood Warning | LSX | Osage | 3 days |
| Apr 28, 8:52 PM CDT | River Flood Warning | LSX | Lincoln | 4 days |
| Apr 28, 8:52 PM CDT | River Flood Warning | LSX | Lincoln | 14 days |
| Apr 28, 8:52 PM CDT | River Flood Warning | LSX | Saint Charles | 69 hr |
| Apr 28, 9:10 PM CDT | River Flood Warning | LSX | Reynolds | 7 days |
| Apr 28, 9:23 PM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 12 days |
| Apr 28, 9:23 PM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 11 days |
| Apr 28, 9:23 PM CDT | River Flood Warning | LSX | Franklin, Warren | 9 days |
| Apr 28, 9:23 PM CDT | River Flood Warning | LSX | Saint Charles, Saint Louis | 11 days |
| Apr 28, 9:40 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 29 min |
| Apr 28, 11:33 PM CDT | Special Weather Statement | LSX | Franklin | 42 min |
| Apr 28, 11:42 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds, Washington | 48 min |
| Apr 29, 1:53 AM CDT | Flash Flood Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 24 hr |
| Apr 29, 6:44 AM CDT | River Flood Warning | LSX | Madison, Saint Francois | 48 hr |
| Apr 29, 6:44 AM CDT | River Flood Warning | LSX | Madison, Saint Francois | 50 hr |
| Apr 29, 10:45 AM CDT | River Flood Warning | LSX | Callaway, Osage | 9 days |
| Apr 29, 1:07 PM CDT | Special Weather Statement | LSX | Callaway, Cole, Osage | 38 min |
| Apr 29, 1:47 PM CDT | Flash Flood Warning | LSX | Audrain, Boone, Callaway, Cole, Moniteau, Osage | 8 hr |
| Apr 29, 2:47 PM CDT | Special Weather Statement | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, Warren | 58 min |
| Apr 29, 3:17 PM CDT | River Flood Warning | LSX | Madison | 48 hr |
| Apr 29, 4:45 PM CDT | River Flood Warning | LSX | Monroe | 4 days |
| Apr 29, 4:55 PM CDT | River Flood Warning | LSX | Marion | 4 days |
| Apr 29, 4:55 PM CDT | River Flood Warning | LSX | Marion | 47 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2017Severe Thunderstorm Warnings in Missouri, 2017Every severe thunderstorm warning in 2017
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.