Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 161, NWS St. Louis, MO

May 12, 2011Cole County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 12, 2011, 7:56 PM CDT for Cole County, Missouri. It was in force for 49 min. 1 report 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 12, 2011, 7:56 PM CDT (00:56 UTC)
Expired: May 12, 2011, 8:45 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cole County, MO

The radar

The St Louis radar (KLSX), 144 km from the middle of the area, began a volume at 00:57 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 12, 8:32 PM CDT	HAIL 0.25	Jefferson City, 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 12, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.9 hours before the alert went out and 226 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: 1521 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1233 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

765 
WUUS53 KLSX 130056
SVRLSX
MOC051-130145-
/O.NEW.KLSX.SV.W.0161.110513T0056Z-110513T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
756 PM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COLE COUNTY IN CENTRAL MISSOURI...

* UNTIL 845 PM CDT

* AT 753 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  WEST OF HICKORY HILL...OR 7 MILES EAST OF ELDON...AND MOVING
  NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JEFFERSON CITY...HICKORY HILL...RUSSELLVILLE...BRAZITO...
  CENTERTOWN...ST. MARTINS...WARDSVILLE...LOHMAN...ELSTON AND MARION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3874 9240 3871 9234 3869 9236 3868 9235
      3867 9229 3862 9220 3861 9220 3858 9217
      3856 9209 3834 9234 3834 9241 3842 9241
      3842 9249 3843 9249
TIME...MOT...LOC 0056Z 221DEG 25KT 3840 9245
WIND...HAIL 60MPH 1.00IN

$$

MILLER

1 follow-up statement

882 
WWUS53 KLSX 130140
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
840 PM CDT THU MAY 12 2011

MOC051-130150-
/O.EXP.KLSX.SV.W.0161.000000T0000Z-110513T0145Z/
COLE MO-
840 PM CDT THU MAY 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR COLE COUNTY WILL EXPIRE AT 845
PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 AM.

LAT...LON 3874 9240 3871 9234 3869 9236 3868 9235
      3867 9229 3862 9220 3861 9220 3858 9217
      3856 9209 3834 9234 3834 9241 3842 9241
      3842 9249 3843 9249
TIME...MOT...LOC 0140Z 221DEG 25KT 3863 9219

$$

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:43 PM CDT	Severe Thunderstorm Warning	LSX	Boone	47 min
May 12, 7:51 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	24 min
May 12, 8:13 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Monroe, Shelby	47 min
May 12, 8:41 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Shelby	49 min
May 12, 10:04 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	56 min
May 12, 10:50 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Jefferson, Washington	40 min
May 13, 10:27 AM CDT	River Flood Warning	LSX	Osage	6 hr
May 13, 2:04 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	41 min
May 13, 2:39 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	51 min
May 13, 3:05 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	20 min
May 13, 4:23 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	23 min
May 13, 4:26 PM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Callaway	4 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning in 2011

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.