Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 185, NWS St. Louis, MO

May 22, 2011Lincoln County, Montgomery County, Pike County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 22, 2011, 6:12 PM CDT for Lincoln County, Montgomery County, Pike County, Missouri. It was in force for 48 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: May 22, 2011, 6:12 PM CDT (23:12 UTC)
Expired: May 22, 2011, 7:00 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Lincoln County, MO, Montgomery County, MO, Pike County, MO

The radar

The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 23:12 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 22, 6:21 PM CDT	HAIL 1.75	3 Nne Bellflower, MO	AT INTERSECTION OF CC AND E.
May 22, 6:40 PM CDT	HAIL 1.75	8 W Silex, 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 22, 12:51 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 248 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: 1465 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -98 m²/s²
0-3 km storm-relative helicity: 133 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.

901 
WUUS53 KLSX 222312
SVRLSX
MOC113-139-163-230000-
/O.NEW.KLSX.SV.W.0185.110522T2312Z-110523T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
612 PM CDT SUN MAY 22 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
  SOUTH CENTRAL PIKE COUNTY IN NORTHEAST MISSOURI...

* UNTIL 700 PM CDT

* AT 608 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR BELLFLOWER...OR 8 MILES NORTHEAST OF
  MONTGOMERY CITY...AND MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DAVIS...TRUXTON...OLNEY...CAVE...SILEX AND WHITESIDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

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 3925 9119 3917 9097 3905 9085 3898 9137
      3910 9146
TIME...MOT...LOC 2312Z 246DEG 28KT 3904 9134
WIND...HAIL <50MPH 1.50IN

$$

TILLY

1 follow-up statement

523 
WWUS53 KLSX 222336
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
636 PM CDT SUN MAY 22 2011

MOC139-222346-
/O.CAN.KLSX.SV.W.0185.000000T0000Z-110523T0000Z/
MONTGOMERY MO-
636 PM CDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR MONTGOMERY COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT. ADDITIONAL 
STORMS ARE EXPECTED THROUGH THE EVENING. 

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 3917 9097 3905 9085 3900 9126 3902 9127
      3914 9126 3914 9129 3919 9130 3925 9119
TIME...MOT...LOC 2336Z 253DEG 23KT 3907 9116

$$

MOC113-163-230000-
/O.CON.KLSX.SV.W.0185.000000T0000Z-110523T0000Z/
LINCOLN MO-PIKE MO-
636 PM CDT SUN MAY 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
LINCOLN COUNTY IN EAST CENTRAL MISSOURI...AND SOUTH CENTRAL PIKE
COUNTY IN NORTHEAST MISSOURI UNTIL 700 PM CDT...

AT 635 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL.  THIS STORM WAS LOCATED 7
MILES NORTH OF HAWK POINT...OR 12 MILES NORTHWEST OF TROY...MOVING
EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  DAVIS...SILEX AND WHITESIDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

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 3917 9097 3905 9085 3900 9126 3902 9127
      3914 9126 3914 9129 3919 9130 3925 9119
TIME...MOT...LOC 2336Z 253DEG 23KT 3907 9116
WIND...HAIL <50MPH 1.75IN

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 9:26 PM CDT	River Flood Warning	LSX	Saint Charles	55 days
May 21, 10:55 PM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	3 days
May 22, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	45 min
May 22, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	46 min
May 22, 4:15 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	45 min
May 22, 4:32 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	58 min
May 22, 4:35 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	55 min
May 22, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Warren	45 min
May 22, 5:02 PM CDT	Tornado Warning	LSX	Franklin, Warren	45 min
May 22, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Boone	45 min
May 22, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau, Osage	40 min
May 22, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	54 min
May 22, 5:27 PM CDT	Tornado Warning	LSX	Callaway, Montgomery	48 min
May 22, 5:37 PM CDT	Tornado Warning	LSX	Saint Charles	38 min
May 22, 5:54 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Gasconade, Montgomery, Osage	51 min
May 22, 5:57 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Montgomery	48 min
May 22, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage, Warren	36 min
May 22, 6:12 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike, Ralls	33 min
May 22, 6:23 PM CDT	Tornado Warning	LSX	Callaway, Montgomery	12 min
May 22, 6:28 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	47 min
May 22, 6:47 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	58 min
May 22, 6:54 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	39 min
May 22, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Franklin, Gasconade, Montgomery, Osage and 1 more	47 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.