Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 1, NWS St. Louis, MO

February 27, 2011Audrain County, Pike County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 27, 2011, 10:37 AM CST for Audrain County, Pike County, Missouri. It was in force for 23 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: Feb 27, 2011, 10:37 AM CST (16:37 UTC)
Expired: Feb 27, 2011, 11:00 AM CST
In force: 23 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Audrain County, MO, Pike County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 16:38 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
Feb 27, 10:45 AM CST	HAIL 0.5	3 S Curryville, MO	HAIL IS RANGING IN SIZE FROM PEA TO MARBLE
Feb 27, 10:50 AM CST	HAIL 0.25	3 Sw Bowling Green, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 4.6 hours before the alert went out and 241 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: 790 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 193 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.

474 
WUUS53 KLSX 271637
SVRLSX
MOC007-163-271700-
/O.NEW.KLSX.SV.W.0001.110227T1637Z-110227T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1037 AM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL AUDRAIN COUNTY IN CENTRAL MISSOURI...
  PIKE COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1100 AM CST

* AT 1035 AM CST...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 NEAR
  VANDALIA...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOWLING GREEN...LOUISIANA...NEW HARTFORD...CURRYVILLE...
  CLARKSVILLE...ASHLEY...ST. CLEMENT...CYRENE AND EDGEWOOD.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3952 9110 3944 9103 3940 9093 3933 9084
      3923 9116 3923 9118 3922 9118 3920 9124
      3916 9147 3932 9151 3932 9144 3935 9145
TIME...MOT...LOC 1637Z 249DEG 44KT 3929 9139
WIND...HAIL 60MPH 1.00IN

$$

TILLY

2 follow-up statements

623 
WWUS53 KLSX 271650
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1050 AM CST SUN FEB 27 2011

MOC007-271659-
/O.CAN.KLSX.SV.W.0001.000000T0000Z-110227T1700Z/
AUDRAIN MO-
1050 AM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL AUDRAIN COUNTY IS
CANCELLED...

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

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3944 9103 3940 9092 3933 9084 3923 9118
      3920 9125 3919 9128 3936 9143 3952 9110
TIME...MOT...LOC 1649Z 245DEG 49KT 3932 9115

$$

MOC163-271700-
/O.CON.KLSX.SV.W.0001.000000T0000Z-110227T1700Z/
PIKE MO-
1050 AM CST SUN FEB 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR PIKE COUNTY IN
NORTHEAST MISSOURI UNTIL 1100 AM CST...

AT 1046 AM CST...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 NEAR
BOWLING GREEN...MOVING NORTHEAST AT 55 MPH.

IN ADDITION...AT 1045 AM...PEA SIZED HAIL WAS REPORTED SOUTH OF 
CURRYVILLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...CLARKSVILLE AND EDGEWOOD.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3944 9103 3940 9092 3933 9084 3923 9118
      3920 9125 3919 9128 3936 9143 3952 9110
TIME...MOT...LOC 1649Z 245DEG 49KT 3932 9115
WIND...HAIL 60MPH 1.00IN

$$

TILLY

336 
WWUS53 KLSX 271700
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CST SUN FEB 27 2011

MOC163-271710-
/O.EXP.KLSX.SV.W.0001.000000T0000Z-110227T1700Z/
PIKE MO-
1100 AM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR PIKE COUNTY IN NORTHEAST
MISSOURI HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3944 9103 3940 9092 3933 9084 3923 9118
      3920 9125 3919 9128 3936 9143 3952 9110
TIME...MOT...LOC 1700Z 248DEG 49KT 3936 9099

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 26, 9:49 PM CST	Dense Fog Advisory	LSX	Audrain, Boone, Callaway, Cole, Knox, Lewis and 7 more	6 hr
Feb 27, 1:18 PM CST	Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Knox, Lewis and 8 more	11 hr
Feb 27, 3:10 PM CST	Dense Fog Advisory	LSX	Audrain, Knox, Lewis, Marion, Monroe, Pike and 2 more	6 hr
Feb 27, 5:42 PM CST	Severe Thunderstorm Warning	LSX	Marion, Monroe, Shelby	48 min

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.