Alert archive / Missouri / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 113, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 19, 2020, 7:32 PM CDT for 4 counties in Missouri. It was in force for 43 min. 3 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
- Jul 19, 2020, 7:32 PM CDT (00:32 UTC)
- Expired
- Jul 19, 2020, 8:15 PM CDT
- In force
- 43 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties City of Saint Louis, MO, Jefferson County, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 30 km from the middle of the area, began a volume at 00:35 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 |
|---|---|---|---|
| Jul 19, 7:45 PM CDT | HAIL 1 | Valley Park, MO | |
| Jul 19, 7:57 PM CDT | TSTM WND DMG | Fenton, MO | ROAD SIGNS BLOWN DOWN. |
| Jul 19, 8:00 PM CDT | HAIL 0.7 | Manchester, 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 00:00Z, 0.5 hours before the alert went out and 222 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
- 1662 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
640
WUUS53 KLSX 200032
SVRLSX
MOC099-183-189-510-200115-
/O.NEW.KLSX.SV.W.0113.200720T0032Z-200720T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
732 PM CDT Sun Jul 19 2020
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Central St. Louis City in east central Missouri...
Central St. Charles County in east central Missouri...
North central Jefferson County in east central Missouri...
St. Louis County in east central Missouri...
* Until 815 PM CDT.
* At 732 PM CDT, a severe thunderstorm was located over Fenton,
moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
St. Louis, St. Charles, St. Peters, Florissant, Chesterfield,
Wildwood, University City, Ballwin, Kirkwood, Maryland Heights,
Hazelwood, Webster Groves, Ferguson, Arnold, Manchester, Creve
Coeur, Overland, Clayton, Jennings and St. Ann.
This includes the following highways...
Interstate 44 in Missouri between exits 261 and 277.
Interstate 70 in Missouri between exits 227 and 231.
This also includes Route 66 State Park, Castlewood State Park, and
First Missouri State Capitol Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in St Louis.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3872 9021 3871 9021 3868 9019 3841 9043
3851 9071 3883 9053 3876 9018
TIME...MOT...LOC 0032Z 198DEG 22KT 3852 9047
HAIL...1.00IN
WIND...60MPH
$$
TES2 follow-up statements
649
WWUS53 KLSX 200056
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
756 PM CDT Sun Jul 19 2020
MOC099-200105-
/O.CAN.KLSX.SV.W.0113.000000T0000Z-200720T0115Z/
Jefferson MO-
756 PM CDT Sun Jul 19 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL JEFFERSON COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3876 9018 3872 9021 3871 9021 3868 9019
3847 9038 3848 9042 3849 9040 3850 9041
3850 9050 3854 9066 3883 9053
TIME...MOT...LOC 0055Z 204DEG 13KT 3861 9044
$$
MOC183-189-510-200115-
/O.CON.KLSX.SV.W.0113.000000T0000Z-200720T0115Z/
St. Louis City MO-St. Charles MO-St. Louis MO-
756 PM CDT Sun Jul 19 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR CENTRAL ST. CHARLES AND ST. LOUIS COUNTIES AND CENTRAL ST. LOUIS
CITY...
At 755 PM CDT, a severe thunderstorm was located over Crystal Lake
Park, moving northeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters reported wind damage and large
hail in the Fenton and Valley Park areas.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St. Louis, St. Charles, St. Peters, Florissant, Chesterfield,
Wildwood, University City, Ballwin, Kirkwood, Maryland Heights,
Hazelwood, Webster Groves, Ferguson, Manchester, Creve Coeur,
Overland, Clayton, Jennings, St. Ann and Crestwood.
This also includes Castlewood State Park and First Missouri State
Capitol Historic Site.
This includes the following highways...
Interstate 44 in Missouri between exits 269 and 277.
Interstate 70 in Missouri between exits 227 and 231.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
St Louis.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3876 9018 3872 9021 3871 9021 3868 9019
3847 9038 3848 9042 3849 9040 3850 9041
3850 9050 3854 9066 3883 9053
TIME...MOT...LOC 0055Z 204DEG 13KT 3861 9044
HAIL...1.00IN
WIND...60MPH
$$
TES843
WWUS53 KLSX 200115
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
815 PM CDT Sun Jul 19 2020
MOC183-189-510-200125-
/O.EXP.KLSX.SV.W.0113.000000T0000Z-200720T0115Z/
St. Louis City MO-St. Charles MO-St. Louis MO-
815 PM CDT Sun Jul 19 2020
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. CHARLES AND ST.
LOUIS COUNTIES AND CENTRAL ST. LOUIS CITY HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
St Louis.
LAT...LON 3876 9018 3872 9021 3871 9021 3868 9019
3847 9038 3848 9042 3849 9040 3850 9041
3850 9050 3854 9066 3883 9053
TIME...MOT...LOC 0115Z 198DEG 22KT 3872 9039
$$
TESThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:46 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 44 min |
| Jul 19, 8:08 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 39 min |
| Jul 19, 8:57 PM CDT | Flash Flood Warning | LSX | Crawford, Franklin, Gasconade | 6 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 2020Every severe thunderstorm warning in 2020
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.