Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 101, NWS St. Louis, MO

May 11, 2016Franklin County, Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2016, 7:57 PM CDT for Franklin County, Saint Charles County, Saint Louis County, Missouri; Calhoun County, Illinois. It was in force for 48 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: May 11, 2016, 7:57 PM CDT (00:57 UTC)
Expired: May 11, 2016, 8:45 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Calhoun County, IL, Franklin County, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 8 km from the middle of the area, began a volume at 00:59 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
May 11, 8:07 PM CDT	TSTM WND DMG	St. Peters, MO	15 FT LONG TREE LIMB DOWN
May 11, 8:07 PM CDT	TSTM WND DMG	St. Peters, MO	SEVERAL LARGE TREE LIMBS DOWN
May 11, 8:07 PM CDT	TSTM WND GST 60	Harvester, MO	BRANCHES DOWN
May 11, 8:10 PM CDT	TSTM WND GST 53	1 Nw Chesterfield, 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
May 11, 12:10 PM CDT	Severe Thunderstorm Watch	SPC	12 hr
May 11, 6:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.0 hours before the alert went out and 246 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 748 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1145 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted.

821 
WUUS53 KLSX 120057 RRA
SVRLSX
ILC013-MOC071-183-189-120145-
/O.NEW.KLSX.SV.W.0101.160512T0057Z-160512T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
757 PM CDT WED MAY 11 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHWESTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
  WESTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  EAST CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 845 PM CDT

* AT 757 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER AUGUSTA...
  MOVING NORTHEAST AT 20 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...
  O'FALLON...ST. CHARLES...ST. PETERS...CHESTERFIELD...WILDWOOD...BALLWIN...
  KIRKWOOD...MARYLAND HEIGHTS...MANCHESTER...CREVE COEUR...LAKE ST.
  LOUIS...CRESTWOOD...DARDENNE PRAIRIE...TOWN AND COUNTRY...EUREKA...
  ELLISVILLE...LADUE...SUNSET HILLS...DES PERES AND PACIFIC.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 44 IN MISSOURI BETWEEN EXITS 269 AND 277.
 INTERSTATE 70 IN MISSOURI BETWEEN EXITS 216 AND 229.

THIS ALSO INCLUDES  BABLER MEMORIAL 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.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3853 9036 3849 9090 3861 9097 3867 9096
      3895 9055
TIME...MOT...LOC 0057Z 246DEG 19KT 3861 9086 

HAIL...1.00IN
WIND...60MPH
 
$$

GKS

1 follow-up statement

429 
WWUS53 KLSX 120110
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
810 PM CDT WED MAY 11 2016

ILC013-MOC071-183-189-120145-
/O.CON.KLSX.SV.W.0101.000000T0000Z-160512T0145Z/
CALHOUN IL-ST. LOUIS MO-ST. CHARLES MO-FRANKLIN MO-
810 PM CDT WED MAY 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTH CENTRAL CALHOUN...NORTHWESTERN ST. LOUIS...WESTERN ST.
CHARLES AND EAST CENTRAL FRANKLIN COUNTIES...

AT 810 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ST. CHARLES...
MOVING NORTHEAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...TRAINED WEATHER SPOTTERS. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
O'FALLON...ST. CHARLES...ST. PETERS...CHESTERFIELD...WILDWOOD...BALLWIN...
KIRKWOOD...MARYLAND HEIGHTS...MANCHESTER...CREVE COEUR...LAKE ST. LOUIS...
CRESTWOOD...DARDENNE PRAIRIE...TOWN AND COUNTRY...EUREKA...ELLISVILLE...
LADUE...SUNSET HILLS...DES PERES AND PACIFIC.

THIS ALSO INCLUDES  BABLER MEMORIAL STATE PARK...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 216 AND 229.

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 3853 9036 3849 9090 3861 9097 3867 9096
      3895 9055
TIME...MOT...LOC 0110Z 235DEG 76KT 3881 9053 

HAIL...<.75IN
WIND...60MPH
 
$$

GKS

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 7:08 PM CDT	Severe Thunderstorm Warning	LSX	Marion	52 min
May 11, 7:14 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 7:19 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Jefferson, Saint Charles, Saint Louis, Warren	41 min
May 11, 7:24 PM CDT	Severe Thunderstorm Warning	LSX	Washington	36 min
May 11, 7:33 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Pike, Ralls	42 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	48 min
May 11, 7:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 8:03 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	42 min
May 11, 8:15 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	45 min
May 11, 8:15 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Washington	30 min
May 11, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
May 11, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	42 min
May 11, 9:18 PM CDT	Flash Flood Warning	LSX	Crawford, Franklin, Jefferson, Sainte Genevieve, Washington	6 hr
May 11, 9:24 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
May 11, 9:24 PM CDT	Special Weather Statement	LSX	Callaway	51 min
May 11, 9:28 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	47 min
May 11, 9:29 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Jefferson, Sainte Genevieve, Saint Francois, Washington	61 min
May 11, 9:53 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	52 min
May 11, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	46 min
May 11, 10:31 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Jefferson, Madison, Reynolds, Sainte Genevieve and 2 more	59 min
May 11, 11:51 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Sainte Genevieve, Saint Francois, Washington	6 hr
May 12, 9:12 AM CDT	River Flood Warning	LSX	Jefferson	3 days
May 12, 9:36 AM CDT	River Flood Warning	LSX	Perry, Sainte Genevieve	5 days
May 12, 10:21 AM CDT	River Flood Warning	LSX	Reynolds	45 hr
May 12, 2:41 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	4 days
May 11, 8:28 PM CDT	Severe Thunderstorm Warning	LSX	Brown	8 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2016 Severe Thunderstorm Warnings in Illinois, 2016 Every 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.