Alert archive / Missouri / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 45, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 30, 2016, 7:02 PM CDT for Franklin County, Jefferson County, Saint Louis County, 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
- Apr 30, 2016, 7:02 PM CDT (00:02 UTC)
- Expired
- Apr 30, 2016, 7:45 PM CDT
- In force
- 43 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Franklin County, MO, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 23 km from the middle of the area, began a volume at 00:04 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, 7:05 PM CDT | HAIL 1 | Eureka, MO | DELAYED REPORT |
| Apr 30, 7:30 PM CDT | HAIL 0.75 | Cedar Hill, MO | POPPED POPCORN SIZED HAIL. |
| Apr 30, 7:50 PM CDT | HAIL 0.7 | House Springs, MO |
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, 0.0 hours before the alert went out and 257 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.
212
WUUS53 KLSX 010002
SVRLSX
MOC071-099-189-010045-
/O.NEW.KLSX.SV.W.0045.160501T0002Z-160501T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
702 PM CDT SAT APR 30 2016
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
SOUTHEASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 745 PM CDT
* AT 701 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR VILLA RIDGE...
MOVING EAST AT 25 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
* LOCATIONS IMPACTED INCLUDE...
CHESTERFIELD...WILDWOOD...BALLWIN...ARNOLD...MANCHESTER...EUREKA...
ELLISVILLE...PACIFIC...VALLEY PARK...FENTON...BYRNES MILL...CLARKSON
VALLEY...ANTONIA...HIGH RIDGE...VILLA RIDGE...MURPHY...CEDAR HILL...GRAY
SUMMIT...WINCHESTER AND TWIN OAKS.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 44 IN MISSOURI BETWEEN EXITS 247 AND 272.
INTERSTATE 55 IN MISSOURI BETWEEN EXITS 187 AND 190.
THIS ALSO INCLUDES BABLER MEMORIAL STATE PARK...ROUTE 66 STATE PARK...
CASTLEWOOD STATE PARK...MASTODON HISTORIC SITE...AND ROBERTSVILLE 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 3827 9083 3849 9099 3859 9080 3859 9078
3861 9076 3868 9062 3868 9060 3838 9034
3837 9035
TIME...MOT...LOC 0001Z 252DEG 21KT 3841 9081
HAIL...1.00IN
WIND...<50MPH
$$
GKS1 follow-up statement
616
WWUS53 KLSX 010020 RRA
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
720 PM CDT SAT APR 30 2016
MOC071-099-189-010045-
/O.CON.KLSX.SV.W.0045.000000T0000Z-160501T0045Z/
ST. LOUIS MO-JEFFERSON MO-FRANKLIN MO-
720 PM CDT SAT APR 30 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHWESTERN ST. LOUIS...NORTHERN JEFFERSON AND SOUTHEASTERN
FRANKLIN COUNTIES...
AT 720 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CEDAR HILL...
MOVING EAST AT 25 MPH.
HAZARD...HALF DOLLAR SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
LOCATIONS IMPACTED INCLUDE...
CHESTERFIELD...WILDWOOD...BALLWIN...ARNOLD...MANCHESTER...EUREKA...
ELLISVILLE...PACIFIC...VALLEY PARK...FENTON...BYRNES MILL...CLARKSON
VALLEY...ANTONIA...HIGH RIDGE...VILLA RIDGE...MURPHY...CEDAR HILL...GRAY
SUMMIT...WINCHESTER AND TWIN OAKS.
THIS ALSO INCLUDES BABLER MEMORIAL STATE PARK...ROUTE 66 STATE PARK...
CASTLEWOOD STATE PARK...MASTODON HISTORIC SITE...AND ROBERTSVILLE STATE
PARK.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 44 IN MISSOURI BETWEEN EXITS 247 AND 272.
INTERSTATE 55 IN MISSOURI BETWEEN EXITS 187 AND 190.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 3827 9083 3849 9099 3859 9080 3859 9078
3861 9076 3868 9062 3868 9060 3838 9034
3837 9035
TIME...MOT...LOC 0020Z 259DEG 22KT 3840 9070
HAIL...1.25IN
WIND...<50MPH
$$
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 | Saint Charles, Saint Louis, City of Saint Louis | 50 min |
| Apr 30, 7:41 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Iron, Washington | 49 min |
| Apr 30, 7:43 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 47 min |
| Apr 30, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 44 min |
| Apr 30, 8:34 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Iron, Washington | 41 min |
Nearby
Severe 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.