Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 26, NWS St. Louis, MO

March 2, 20125 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 2, 2012, 4:41 AM CST for 5 counties in Missouri. It was in force for 49 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: Mar 2, 2012, 4:41 AM CST (10:41 UTC)
Expired: Mar 2, 2012, 5:30 AM CST
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Franklin County, MO, Gasconade County, MO, Lincoln County, MO, Montgomery County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 49 km from the middle of the area, began a volume at 10:40 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, 4:43 AM CST	HAIL 2	Hermann, MO	HAIL COVERING GROUND.
Mar 2, 4:56 AM CST	HAIL 1	2 S Warrenton, MO
Mar 2, 5:00 AM CST	HAIL 1.75	6 S Warrenton, MO	HAIL COVERING GROUND.
Mar 2, 5:26 AM CST	HAIL 0.88	3 E Marthasville, 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, 10.7 hours before the alert went out and 276 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.

229 
WUUS53 KLSX 021041
SVRLSX
MOC071-073-113-139-219-021130-
/O.NEW.KLSX.SV.W.0026.120302T1041Z-120302T1130Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  SOUTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
  WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 530 AM CST

* AT 436 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 5 MILES SOUTHWEST OF HERMANN...AND MOVING EAST AT
  65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WARRENTON...WRIGHT CITY...JONESBURG...TRELOAR...MARTHASVILLE...
  TRUESDALE...BERGER AND HOLSTEIN.

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 3896 9101 3878 9096 3862 9097 3862 9122
      3855 9153 3875 9165 3876 9164
TIME...MOT...LOC 1041Z 250DEG 56KT 3867 9141
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY

1 follow-up statement

099 
WWUS53 KLSX 021045
SVSLSX

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

MOC071-073-113-139-219-021130-
/O.CON.KLSX.SV.W.0026.000000T0000Z-120302T1130Z/
FRANKLIN MO-GASCONADE MO-LINCOLN MO-MONTGOMERY MO-WARREN MO-
445 AM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WARREN...
MONTGOMERY...SOUTH CENTRAL LINCOLN...GASCONADE AND NORTHWESTERN
FRANKLIN COUNTIES UNTIL 530 AM CST...

AT 440 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP TO
TENNIS BALL SIZE.  THIS STORM WAS LOCATED NEAR HERMANN...MOVING EAST
AT 65 MPH.

IN ADDITION...AT 440 AM 2 INCH HAIL WAS REPORTED IN HERMANN WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  WARRENTON...WRIGHT CITY...JONESBURG...TRELOAR...MARTHASVILLE...
  TRUESDALE AND HOLSTEIN.

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 3896 9101 3878 9096 3862 9097 3862 9122
      3856 9150 3876 9162
TIME...MOT...LOC 1044Z 250DEG 56KT 3868 9135
WIND...HAIL <50MPH 2.50IN

$$

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, 5:10 AM CST	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	39 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

Nearby

Severe Thunderstorm Warnings in Missouri, 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.