Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 356, NWS St. Louis, MO

June 18, 2011Calhoun County, Greene County, Pike County, Illinois; Pike County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 2011, 11:55 PM CDT for Calhoun County, Greene County, Pike County, Illinois; Pike County, Missouri. It was in force for 50 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: Jun 18, 2011, 11:55 PM CDT (04:55 UTC)
Expired: Jun 19, 2011, 12:45 AM CDT
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Calhoun County, IL, Greene County, IL, Pike County, IL, Pike County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 04:57 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
Jun 19, 12:05 AM CDT	HAIL 0.88	Louisiana, MO	WIND GUST TO 54 MPH AT KJFM
Jun 19, 12:23 AM CDT	HAIL 0.5	Pleasant Hill, IL

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
Jun 18, 8:26 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.9 hours before the alert went out and 188 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: 115 J/kg
Mixed-layer CIN: -294 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

992 
WUUS53 KLSX 190455
SVRLSX
ILC013-061-149-MOC163-190545-
/O.NEW.KLSX.SV.W.0356.110619T0455Z-110619T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1155 PM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  WESTERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
  SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  EASTERN PIKE COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1245 AM CDT

* AT 1153 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  EAST OF BOWLING GREEN...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...PIKE...CLARKSVILLE...ATLAS...PLEASANT
  HILL...BELLEVIEW...GRIGGSVILLE...CARROLLTON...PAYNESVILLE...
  ANNADA...ROCKPORT...MOZIER...SUMMER HILL...NEW HARTFORD...
  MARTINSBURG...NEBO...INDEPENDENCE...KAMPSVILLE AND BEECREEK.

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 3972 9063 3972 9064 3968 9063 3963 9060
      3961 9060 3958 9058 3954 9057 3953 9058
      3953 9052 3927 9038 3923 9112 3941 9124
      3982 9068
TIME...MOT...LOC 0455Z 242DEG 31KT 3936 9106
WIND...HAIL 60MPH 1.75IN

$$

TRUETT

2 follow-up statements

099 
WWUS53 KLSX 190520
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1220 AM CDT SUN JUN 19 2011

MOC163-190530-
/O.CAN.KLSX.SV.W.0356.000000T0000Z-110619T0545Z/
PIKE MO-
1220 AM CDT SUN JUN 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PIKE COUNTY IN
NORTHEAST MISSOURI IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.  HOWEVER...ADDITIONAL STRONG STORMS ARE POSSIBLE AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 4 AM. 

LAT...LON 3972 9063 3969 9064 3958 9058 3954 9057
      3953 9058 3953 9052 3936 9044 3931 9080
      3948 9107 3949 9106 3952 9108 3982 9068
TIME...MOT...LOC 0520Z 242DEG 31KT 3946 9081

$$

ILC013-061-149-190545-
/O.CON.KLSX.SV.W.0356.000000T0000Z-110619T0545Z/
PIKE IL-CALHOUN IL-GREENE IL-
1220 AM CDT SUN JUN 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN 
GREENE AND EXTREME NORTHERN CALHOUN COUNTIES IN SOUTHWEST 
ILLINOIS...AND SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS 
UNTIL 1245 AM CDT...

AT 1218 AM 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 NEAR
PLEASANT HILL...OR 11 MILES SOUTH OF PITTSFIELD...MOVING NORTHEAST AT
35 MPH.

LOCATIONS IMPACTED INCLUDE...
  PITTSFIELD...GRIGGSVILLE...INDEPENDENCE...BEECREEK...TIME...
  PEARL...HAYPRESS...MILTON...DETROIT...BEDFORD...HILLVIEW...
  WALKERSVILLE...MONTEZUMA...FLORENCE AND VALLEY CITY.

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 3972 9063 3969 9064 3958 9058 3954 9057
      3953 9058 3953 9052 3936 9044 3931 9080
      3948 9107 3949 9106 3952 9108 3982 9068
TIME...MOT...LOC 0520Z 242DEG 31KT 3946 9081
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

002 
WWUS53 KLSX 190546
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1246 AM CDT SUN JUN 19 2011

ILC013-061-149-190556-
/O.EXP.KLSX.SV.W.0356.000000T0000Z-110619T0545Z/
PIKE IL-CALHOUN IL-GREENE IL-
1246 AM CDT SUN JUN 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GREENE AND
NORTHERN CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND SOUTHEASTERN
PIKE COUNTY IN WEST CENTRAL ILLINOIS HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.  HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS 
THUNDERSTORM FROM DETROIT AND MILTON TO THE PIKE-SCOTT COUNTY LINE 
UNTIL 1 AM. 

LAT...LON 3972 9063 3969 9064 3958 9058 3954 9057
      3953 9058 3953 9052 3936 9044 3931 9080
      3948 9107 3949 9106 3952 9108 3982 9068
TIME...MOT...LOC 0520Z 229DEG 31KT 3946 9081

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 1:59 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	46 min
Jun 19, 2:07 AM CDT	Severe Thunderstorm Warning	LSX	Adams	33 min
Jun 19, 2:25 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	50 min
Jun 19, 2:36 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Monroe, Randolph, Saint Clair, Washington	39 min
Jun 19, 2:56 AM CDT	Tornado Warning	LSX	Monroe, Randolph	34 min
Jun 19, 3:07 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Monroe, Randolph, Saint Clair, Washington	38 min
Jun 19, 3:32 AM CDT	Flash Flood Warning	LSX	Bond	6 hr
Jun 19, 4:02 AM CDT	Flash Flood Warning	LSX	Fayette	6 hr
Jun 19, 9:25 AM CDT	Areal Flood Warning	LSX	Bond	13 hr
Jun 19, 9:55 AM CDT	Areal Flood Warning	LSX	Fayette	6 hr
Jun 18, 8:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau	49 min
Jun 18, 9:09 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole	66 min
Jun 18, 9:29 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	46 min
Jun 18, 9:56 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	37 min
Jun 18, 10:11 PM CDT	Severe Thunderstorm Warning	LSX	Osage	37 min
Jun 18, 10:23 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	25 min
Jun 18, 10:36 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	39 min
Jun 18, 10:53 PM CDT	Flash Flood Warning	LSX	Cole, Osage	8 hr
Jun 18, 10:54 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike	36 min
Jun 18, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	46 min
Jun 18, 11:20 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	40 min
Jun 18, 11:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	32 min
Jun 19, 12:13 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	47 min
Jun 19, 12:52 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	53 min
Jun 19, 1:08 AM CDT	Severe Thunderstorm Warning	LSX	Franklin	32 min
Jun 19, 1:51 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds, Washington	39 min
Jun 19, 2:28 AM CDT	Tornado Warning	LSX	Iron, Sainte Genevieve, Saint Francois, Washington	47 min
Jun 19, 2:39 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds	36 min
Jun 19, 3:00 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds	60 min
Jun 19, 10:10 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	11 hr
Jun 19, 10:10 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	11 hr
Jun 19, 2:48 PM CDT	River Flood Warning	LSX	Lewis	68 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2011 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.