Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 409, NWS St. Louis, MO

June 26, 2011Adams County, Brown County, Illinois; Lewis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 26, 2011, 9:16 PM CDT for Adams County, Brown County, Illinois; Lewis County, Missouri. It was in force for 59 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: Jun 26, 2011, 9:16 PM CDT (02:16 UTC)
Expired: Jun 26, 2011, 10:15 PM CDT
In force: 59 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Adams County, IL, Brown County, IL, Lewis County, MO

The radar

The St Louis radar (KLSX), 159 km from the middle of the area, began a volume at 02:20 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 26, 9:16 PM CDT	HAIL 0.5	8 N La Belle, MO	JUST UNDER DIME SIZE HAIL NEAR INTERSECTION OF HIGHWAYS K AND E.
Jun 26, 9:30 PM CDT	HAIL 1	5 Wsw Monticello, MO	QUARTER SIZE HAIL JUST WEST SOUTHWEST OF MONTICELLO ON HIGHWAY 16
Jun 26, 9:33 PM CDT	HAIL 0.75	Lima, IL
Jun 26, 10:05 PM CDT	HAIL 0.25	5 N Mound Station, 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 26, 7:12 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.3 hours before the alert went out and 182 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: 15 J/kg
Mixed-layer CIN: -398 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 115 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.

596 
WUUS53 KLSX 270216
SVRLSX
ILC001-009-MOC111-270315-
/O.NEW.KLSX.SV.W.0409.110627T0216Z-110627T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
916 PM CDT SUN JUN 26 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHWESTERN BROWN COUNTY IN WEST CENTRAL ILLINOIS...
  LEWIS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1015 PM CDT

* AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM FANDON TO EWING...AND MOVING
  EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  QUINCY...MAYWOOD...LA GRANGE...MENDON...GOLDEN...CAMP POINT...
  CLAYTON...MOUNT STERLING...BUCKHORN...WOODVILLE...LORAINE...URSA...
  CHATTON...LA PRAIRIE...FOWLER...PALOMA...COATSBURG...BURTON...
  COLUMBUS AND LIBERTY.

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 4025 9150 4020 9150 4020 9092 4011 9090
      4011 9070 4003 9065 4003 9060 3998 9060
      3982 9096 3992 9142 3995 9144 3995 9158
      4002 9195 4026 9195
TIME...MOT...LOC 0216Z 283DEG 43KT 4042 9078 4006 9169
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

1 follow-up statement

614 
WWUS53 KLSX 270252
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
952 PM CDT SUN JUN 26 2011

ILC001-009-MOC111-270315-
/O.CON.KLSX.SV.W.0409.000000T0000Z-110627T0315Z/
ADAMS IL-BROWN IL-LEWIS MO-
952 PM CDT SUN JUN 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
LEWIS...NORTHWESTERN BROWN AND ADAMS COUNTIES UNTIL 1015 PM CDT...

AT 949 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THE LEADING EDGE OF 
THIS LINE OF STORMS WAS LOCATED ALONG A LINE EXTENDING FROM 10 
MILES SOUTHEAST OF AUGUSTA TO CAMP POINT TO EWING...MOVING EAST AT 
40 MPH.

LOCATIONS IMPACTED INCLUDE...
  QUINCY...CLAYTON...MOUNT STERLING...BUCKHORN...COLUMBUS...MOUND
  STATION...RIPLEY...BURTON...KELLERVILLE AND LIBERTY.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4020 9150 4020 9092 4011 9090 4011 9070
      4003 9065 4003 9060 3998 9060 3982 9096
      3992 9142 3995 9144 3995 9158 3999 9180
      4024 9171 4025 9150
TIME...MOT...LOC 0252Z 279DEG 37KT 4013 9078 4001 9109
          3998 9161
WIND...HAIL 60MPH 1.00IN

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 8:34 PM CDT	Severe Thunderstorm Warning	LSX	Adams	41 min
Jun 26, 9:09 PM CDT	River Flood Warning	LSX	Adams	4 days
Jun 26, 9:09 PM CDT	River Flood Warning	LSX	Adams	5 days
Jun 26, 9:45 PM CDT	River Flood Warning	LSX	Clinton	9 days
Jun 26, 10:09 PM CDT	Severe Thunderstorm Warning	LSX	Brown	36 min
Jun 26, 10:11 PM CDT	Flash Flood Warning	LSX	Adams, Brown	11 hr
Jun 27, 12:26 AM CDT	Severe Thunderstorm Warning	LSX	Adams	49 min
Jun 27, 1:08 AM CDT	Tornado Warning	LSX	Adams, Calhoun, Pike	37 min
Jun 27, 1:13 AM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	62 min
Jun 27, 1:27 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun	63 min
Jun 27, 1:43 AM CDT	Tornado Warning	LSX	Adams, Calhoun, Greene, Pike	32 min
Jun 27, 2:04 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison	41 min
Jun 27, 2:09 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	36 min
Jun 27, 2:42 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Jersey, Macoupin, Madison, Monroe, Montgomery and 1 more	48 min
Jun 27, 3:01 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	29 min
Jun 27, 8:25 AM CDT	River Flood Warning	LSX	Adams	4 days
Jun 27, 8:57 AM CDT	Areal Flood Warning	LSX	Adams, Brown	12 hr
Jun 26, 7:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	14 min
Jun 26, 7:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	38 min
Jun 26, 8:28 PM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	65 days
Jun 26, 8:30 PM CDT	Flash Flood Warning	LSX	Knox, Lewis	12 hr
Jun 27, 12:11 AM CDT	Severe Thunderstorm Warning	LSX	Knox	19 min
Jun 27, 12:52 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Monroe, Montgomery, Pike and 1 more	53 min
Jun 27, 12:55 AM CDT	Tornado Warning	LSX	Marion, Monroe, Ralls, Shelby	20 min
Jun 27, 2:17 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Crawford, Franklin, Gasconade, Jefferson, Montgomery and 5 more	43 min
Jun 27, 3:14 AM CDT	River Flood Warning	LSX	Marion	4 days
Jun 27, 4:18 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau, Osage	23 min
Jun 27, 8:22 AM CDT	Areal Flood Warning	LSX	Knox, Lewis	12 hr
Jun 27, 3:11 PM CDT	River Flood Warning	LSX	Franklin, Warren	22 days
Jun 27, 3:11 PM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	44 days
Jun 27, 5:19 PM CDT	River Flood Warning	LSX	Lincoln	18 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.