Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 27, NWS St. Louis, MO

March 2, 2012Lincoln County, Saint Charles County, Warren County, Missouri; Calhoun County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 2, 2012, 5:10 AM CST for Lincoln County, Saint Charles County, Warren County, Missouri; Calhoun County, Illinois. It was in force for 39 min. 2 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: Mar 2, 2012, 5:10 AM CST (11:10 UTC)
Expired: Mar 2, 2012, 5:49 AM CST
In force: 39 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 50.0 mph

Counties Calhoun County, IL, Lincoln County, MO, Saint Charles County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 29 km from the middle of the area, began a volume at 11:11 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
Mar 2, 5:20 AM CST	HAIL 0.25	Flint Hill, MO
Mar 2, 5:30 AM CST	HAIL 0.5	Wentzville, 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
Mar 2, 2:07 AM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 11.2 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2012 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

418 
WUUS53 KLSX 021110
SVRLSX
ILC013-MOC113-183-219-021200-
/O.NEW.KLSX.SV.W.0027.120302T1110Z-120302T1200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
510 AM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  NORTHWESTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  NORTHEASTERN WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 600 AM CST

* AT 506 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR TRUESDALE...OR NEAR WARRENTON...AND MOVING
  NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WRIGHT CITY...WENTZVILLE...TROY...ST. PAUL...MOSCOW MILLS...
  WINFIELD...FORISTELL...FLINT HILL...OLD MONROE...FOLEY...
  BEECHVILLE...GOLDEN EAGLE...BRUSSELS...BATCHTOWN...MEPPEN AND DEER
  PLAIN.

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 3902 9058 3899 9057 3897 9055 3888 9049
      3870 9113 3888 9125 3918 9068
TIME...MOT...LOC 1110Z 237DEG 37KT 3882 9105
WIND...HAIL <50MPH 1.75IN

$$

KANOFSKY

1 follow-up statement

217 
WWUS53 KLSX 021149
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
549 AM CST FRI MAR 2 2012

ILC013-MOC113-183-219-021159-
/O.CAN.KLSX.SV.W.0027.000000T0000Z-120302T1200Z/
CALHOUN IL-LINCOLN MO-ST. CHARLES MO-WARREN MO-
549 AM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WARREN...
NORTHWESTERN ST. CHARLES...SOUTHEASTERN LINCOLN AND CALHOUN COUNTIES
IS CANCELLED...

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 7 AM.

LAT...LON 3902 9058 3899 9057 3897 9055 3888 9049
      3870 9113 3888 9125 3918 9068
TIME...MOT...LOC 1149Z 237DEG 37KT 3904 9062

$$

KANOFSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 3:34 AM CST	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau, Osage	41 min
Mar 2, 3:59 AM CST	Severe Thunderstorm Warning	LSX	Cole, Osage	46 min
Mar 2, 4:08 AM CST	Severe Thunderstorm Warning	LSX	Callaway, Cole, Franklin, Gasconade, Montgomery, Osage and 1 more	37 min
Mar 2, 4:37 AM CST	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	38 min
Mar 2, 4:41 AM CST	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Lincoln, Montgomery, Warren	49 min
Mar 2, 5:13 AM CST	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	47 min
Mar 2, 5:56 AM CST	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis, City of Saint Louis	49 min
Mar 2, 5:59 AM CST	Severe Thunderstorm Warning	LSX	Callaway	28 min
Mar 2, 6:36 AM CST	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	39 min
Mar 2, 7:07 AM CST	Severe Thunderstorm Warning	LSX	Lincoln, Pike	30 min
Mar 2, 1:59 PM CST	Wind Advisory	LSX	Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln and 10 more	4 hr
Mar 2, 6:36 AM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Macoupin, Madison, Montgomery	39 min
Mar 2, 7:14 AM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	25 min
Mar 2, 9:49 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	41 min
Mar 2, 10:10 AM CST	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette	50 min
Mar 2, 11:12 AM CST	Severe Thunderstorm Warning	LSX	Fayette, Marion	16 min
Mar 2, 11:29 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Randolph, Washington	31 min
Mar 2, 11:41 AM CST	Severe Thunderstorm Warning	LSX	Marion	49 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Severe Thunderstorm Warnings in Illinois, 2012 Every severe thunderstorm warning in 2012

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.