Alert archive / Missouri / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 56, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 10, 2017, 9:58 AM CDT for 4 counties in Missouri. It was in force for 47 min. 4 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 10, 2017, 9:58 AM CDT (14:58 UTC)
- Expired
- Apr 10, 2017, 10:45 AM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Franklin County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 17 km from the middle of the area, began a volume at 15:00 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 10, 9:58 AM CDT | HAIL 1.25 | 1 Ese Washington, MO | TWITTER PICTURE. |
| Apr 10, 10:00 AM CDT | HAIL 0.88 | Washington, MO | |
| Apr 10, 10:25 AM CDT | HAIL 1 | 2 Wsw Weldon Spring, MO | AT WFO ST. LOUIS. |
| Apr 10, 10:30 AM CDT | HAIL 1 | 2 Ne Weldon Spring, MO | VIA FACEBOOK. KISKER AND HIGHWAY 94. |
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, 3.0 hours before the alert went out and 258 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
- 1373 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
410 WUUS53 KLSX 101458 SVRLSX MOC071-183-189-219-101545- /O.NEW.KLSX.SV.W.0056.170410T1458Z-170410T1545Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service St Louis MO 958 AM CDT MON APR 10 2017 The National Weather Service in St Louis has issued a * Severe Thunderstorm Warning for... Southwestern St. Charles County in east central Missouri... Northeastern Franklin County in east central Missouri... West central St. Louis County in east central Missouri... Southeastern Warren County in east central Missouri... * Until 1045 AM CDT. * At 957 AM CDT, a severe thunderstorm was located over Washington, moving northeast at 45 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... O'Fallon, St. Peters, Chesterfield, Wildwood, Lake St. Louis, Washington, Dardenne Prairie, Weldon Spring, Cottleville, Spirit of St. Louis Airport, New Melle, Augusta, Weldon Spring Heights, Dutzow, Defiance and Matson. This includes Interstate 70 in Missouri between exits 217 and 220. This also includes Babler Memorial State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3848 9099 3860 9107 3883 9067 3868 9053 TIME...MOT...LOC 1457Z 237DEG 41KT 3854 9100 HAIL...1.00IN WIND...<50MPH $$ Byrd
1 follow-up statement
214
WWUS53 KLSX 101514
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1014 AM CDT MON APR 10 2017
MOC071-219-101522-
/O.CAN.KLSX.SV.W.0056.000000T0000Z-170410T1545Z/
Franklin MO-Warren MO-
1014 AM CDT MON APR 10 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FRANKLIN AND
SOUTHEASTERN WARREN COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3860 9073 3864 9073 3859 9078 3858 9082
3856 9086 3867 9094 3883 9067 3868 9053
TIME...MOT...LOC 1512Z 237DEG 41KT 3864 9081
$$
MOC183-189-101545-
/O.CON.KLSX.SV.W.0056.000000T0000Z-170410T1545Z/
St. Charles MO-St. Louis MO-
1014 AM CDT MON APR 10 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR SOUTHWESTERN ST. CHARLES AND WEST CENTRAL ST. LOUIS COUNTIES...
At 1012 AM CDT, a severe thunderstorm was located over Defiance,
moving northeast at 45 mph.
HAZARD...Half dollar size hail.
SOURCE...Trained weather spotters reported one and one quarter inch
hail in Washington at 958 am.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
O'Fallon, St. Peters, Chesterfield, Wildwood, Lake St. Louis,
Dardenne Prairie, Weldon Spring, Cottleville, Spirit of St. Louis
Airport, New Melle, Weldon Spring Heights, Defiance and Matson.
This also includes Babler Memorial State Park.
This includes Interstate 70 in Missouri between exits 217 and 220.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3860 9073 3864 9073 3859 9078 3858 9082
3856 9086 3867 9094 3883 9067 3868 9053
TIME...MOT...LOC 1512Z 237DEG 41KT 3864 9081
HAIL...1.25IN
WIND...<50MPH
$$
ByrdThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 3:57 AM CDT | Special Weather Statement | LSX | Shelby | 48 min |
| Apr 10, 7:11 AM CDT | Special Weather Statement | LSX | Franklin, Gasconade, Osage, Warren | 49 min |
| Apr 10, 9:55 AM CDT | Special Weather Statement | LSX | Saint Charles | 50 min |
| Apr 10, 10:29 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 26 min |
| Apr 10, 5:51 PM CDT | Special Weather Statement | LSX | Crawford, Washington | 39 min |
| Apr 10, 5:56 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 36 min |
Nearby
Severe 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.