Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 206, NWS St. Louis, MO

May 25, 20115 counties in Illinois; 4 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 25, 2011, 2:00 AM CDT for 5 counties in Illinois; 4 counties in Missouri. It was in force for 45 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 25, 2011, 2:00 AM CDT (07:00 UTC)
Expired: May 25, 2011, 2:45 AM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Adams County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Pike County, IL, Lincoln County, MO, Marion County, MO, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 06:59 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 25, 2:02 AM CDT	HAIL 0.75	Elsberry, MO
May 25, 2:03 AM CDT	HAIL 0.75	Foley, 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 25, 1:22 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.0 hours before the alert went out and 212 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: 375 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1724 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 44 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.

141 
WUUS53 KLSX 250700
SVRLSX
ILC001-013-061-083-149-MOC113-127-163-173-250745-
/O.NEW.KLSX.SV.W.0206.110525T0700Z-110525T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
200 AM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  GREENE COUNTY IN SOUTHWEST ILLINOIS...
  WEST CENTRAL JERSEY COUNTY IN SOUTHWEST ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHEASTERN MARION COUNTY IN NORTHEAST MISSOURI...
  PIKE COUNTY IN NORTHEAST MISSOURI...
  RALLS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 245 AM CDT

* AT 159 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PING PONG BALL
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM MONROE CITY TO HARDIN...
  AND MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...HANNIBAL...PITTSFIELD...WHITE HALL...HARDIN...
  FRANKFORD...NEW LONDON...CLARKSVILLE...PIKE...BELLEVIEW...PLEASANT
  HILL...ATLAS...CARROLLTON...FALL CREEK...BARRY...PAYSON...
  ROODHOUSE...BEVERLY...GRIGGSVILLE AND ANNADA.

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 3953 9057
      3952 9017 3896 9066 3929 9144 3932 9144
      3932 9152 3938 9167 4001 9128
TIME...MOT...LOC 0701Z 234DEG 39KT 3965 9175 3914 9062
WIND...HAIL 60MPH 1.50IN

$$

CVKING

2 follow-up statements

728 
WWUS53 KLSX 250723
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
223 AM CDT WED MAY 25 2011

ILC083-MOC113-250733-
/O.CAN.KLSX.SV.W.0206.000000T0000Z-110525T0745Z/
JERSEY IL-LINCOLN MO-
223 AM CDT WED MAY 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LINCOLN AND WEST
CENTRAL JERSEY COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4001 9128 3972 9064 3969 9064 3958 9058
      3953 9057 3952 9018 3922 9043 3951 9158
TIME...MOT...LOC 0723Z 234DEG 39KT 3979 9150 3928 9037

$$

ILC001-013-061-149-MOC127-163-173-250745-
/O.CON.KLSX.SV.W.0206.000000T0000Z-110525T0745Z/
PIKE IL-ADAMS IL-CALHOUN IL-GREENE IL-MARION MO-PIKE MO-RALLS MO-
223 AM CDT WED MAY 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GREENE AND
CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND SOUTHERN ADAMS AND PIKE
COUNTIES IN WEST CENTRAL ILLINOIS...AND NORTHEASTERN RALLS...NORTHERN
PIKE AND SOUTHEASTERN MARION COUNTIES IN NORTHEAST MISSOURI UNTIL 245
AM CDT...

AT 221 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PING PONG BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM PALMYRA TO CARROLLTON...MOVING
NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PITTSFIELD...WHITE HALL...CARROLLTON...FALL CREEK...BARRY...
  PAYSON...ROODHOUSE...BEVERLY...GRIGGSVILLE...HAYPRESS...SUMMER
  HILL...MARTINSBURG...NEW CANTON...HULL...NEW HARTFORD...
  WALKERSVILLE...EL DARA...INDEPENDENCE...PEARL AND KINDERHOOK.

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.

&&

LAT...LON 4001 9128 3972 9064 3969 9064 3958 9058
      3953 9057 3952 9018 3922 9043 3951 9158
TIME...MOT...LOC 0723Z 234DEG 39KT 3979 9150 3928 9037
WIND...HAIL 60MPH 1.50IN

$$

CVKING

858 
WWUS53 KLSX 250739
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
239 AM CDT WED MAY 25 2011

ILC001-013-061-149-MOC127-163-173-250750-
/O.EXP.KLSX.SV.W.0206.000000T0000Z-110525T0745Z/
PIKE IL-ADAMS IL-CALHOUN IL-GREENE IL-MARION MO-PIKE MO-RALLS MO-
239 AM CDT WED MAY 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR GREENE AND CALHOUN COUNTIES IN
SOUTHWEST ILLINOIS...AND SOUTHERN ADAMS AND PIKE COUNTIES IN WEST
CENTRAL ILLINOIS...AND NORTHEASTERN RALLS...NORTHERN PIKE AND
SOUTHEASTERN MARION COUNTIES IN NORTHEAST MISSOURI WILL EXPIRE AT 245
AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 8 AM.

LAT...LON 4001 9128 3972 9064 3969 9064 3958 9058
      3953 9057 3952 9018 3922 9043 3951 9158
TIME...MOT...LOC 0740Z 234DEG 39KT 3990 9130 3938 9018

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 4:15 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	35 min
May 25, 4:39 AM CDT	Tornado Warning	LSX	Calhoun, Greene, Jersey	22 min
May 25, 7:47 AM CDT	Areal Flood Advisory	LSX	Adams, Brown, Pike	3 hr
May 25, 11:24 AM CDT	River Flood Warning	LSX	Pike, Scott	47 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Adams	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Adams	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Adams	13 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Pike	40 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Pike	15 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Pike	40 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Calhoun	46 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Calhoun	43 days
May 25, 12:15 PM CDT	River Flood Warning	LSX	Saint Clair	46 days
May 25, 12:18 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	42 min
May 25, 12:56 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	13 min
May 25, 1:05 PM CDT	Tornado Warning	LSX	Fayette	16 min
May 25, 1:09 PM CDT	Areal Flood Advisory	LSX	Fayette, Montgomery	4 hr
May 25, 2:49 PM CDT	Tornado Warning	LSX	Monroe	32 min
May 25, 2:54 PM CDT	Tornado Warning	LSX	Adams, Pike	51 min
May 25, 2:55 PM CDT	Tornado Warning	LSX	Calhoun, Pike	50 min
May 25, 3:25 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison, Montgomery	50 min
May 25, 3:29 PM CDT	Tornado Warning	LSX	Calhoun, Greene, Jersey	46 min
May 25, 3:30 PM CDT	Tornado Warning	LSX	Monroe	33 min
May 25, 3:34 PM CDT	Tornado Warning	LSX	Adams, Pike	41 min
May 25, 3:36 PM CDT	Tornado Warning	LSX	Jersey, Macoupin, Madison	29 min
May 25, 3:37 PM CDT	Tornado Warning	LSX	Adams, Pike	25 min
May 25, 3:43 PM CDT	Tornado Warning	LSX	Calhoun, Greene, Pike	47 min
May 25, 3:53 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	52 min
May 25, 4:00 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Monroe, Saint Clair	45 min
May 25, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	40 min
May 25, 4:11 PM CDT	Tornado Warning	LSX	Madison, Monroe, Saint Clair	49 min
May 25, 4:23 PM CDT	Tornado Warning	LSX	Monroe, Randolph, Saint Clair	52 min
May 25, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin, Madison	38 min
May 25, 4:51 PM CDT	Tornado Warning	LSX	Monroe	39 min
May 25, 4:56 PM CDT	Tornado Warning	LSX	Macoupin, Madison	49 min
May 25, 5:00 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Monroe, Saint Clair	25 min
May 25, 5:08 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair, Washington	52 min
May 25, 5:12 PM CDT	Tornado Warning	LSX	Randolph, Saint Clair	48 min
May 25, 5:16 PM CDT	Areal Flood Advisory	LSX	Brown	4 hr
May 25, 5:23 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	52 min
May 25, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Washington	51 min
May 25, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison, Montgomery	45 min
May 25, 5:34 PM CDT	Tornado Warning	LSX	Bond, Clinton, Fayette, Madison, Marion, Montgomery	41 min
May 25, 5:37 PM CDT	Flash Flood Warning	LSX	Brown	4 hr
May 25, 5:46 PM CDT	Tornado Warning	LSX	Clinton, Randolph, Saint Clair, Washington	44 min
May 25, 5:48 PM CDT	Areal Flood Advisory	LSX	Bond, Fayette, Madison, Montgomery, Saint Clair	5 hr
May 25, 5:51 PM CDT	Tornado Warning	LSX	Randolph	29 min
May 25, 6:02 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	43 min
May 25, 6:23 PM CDT	Tornado Warning	LSX	Clinton, Marion, Washington	34 min
May 25, 6:33 PM CDT	River Flood Warning	LSX	Brown	40 hr
May 25, 6:34 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion, Montgomery	26 min
May 25, 6:48 PM CDT	Tornado Warning	LSX	Fayette, Marion	26 min
May 25, 1:32 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	43 min
May 25, 1:35 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	40 min
May 25, 2:16 AM CDT	Areal Flood Advisory	LSX	Boone, Cole, Moniteau	6 hr
May 25, 3:09 AM CDT	Areal Flood Advisory	LSX	Audrain, Knox, Lewis, Marion, Monroe, Ralls and 1 more	5 hr
May 25, 3:55 AM CDT	Flash Flood Warning	LSX	Lewis, Marion, Shelby	6 hr
May 25, 5:08 AM CDT	River Flood Warning	LSX	Lewis	3 days
May 25, 7:56 AM CDT	River Flood Warning	LSX	Marion	12 hr
May 25, 9:06 AM CDT	River Flood Warning	LSX	Marion	11 hr
May 25, 11:03 AM CDT	River Flood Warning	LSX	Callaway, Cole	5 days
May 25, 11:03 AM CDT	River Flood Warning	LSX	Franklin, Warren	6 days
May 25, 11:03 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	20 days
May 25, 1:00 PM CDT	Tornado Warning	LSX	Cole, Moniteau	60 min
May 25, 1:36 PM CDT	Flash Flood Warning	LSX	Moniteau	5 hr
May 25, 1:36 PM CDT	Tornado Warning	LSX	Cole	39 min
May 25, 1:48 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	42 min
May 25, 1:54 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Warren	51 min
May 25, 1:55 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	50 min
May 25, 2:02 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Marion, Monroe, Ralls, Shelby	43 min
May 25, 2:05 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike	40 min
May 25, 2:07 PM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Pike, Warren	53 min
May 25, 2:11 PM CDT	Tornado Warning	LSX	Audrain, Marion, Monroe, Ralls, Shelby	49 min
May 25, 2:14 PM CDT	Flash Flood Warning	LSX	Cole	5 hr
May 25, 2:15 PM CDT	Tornado Warning	LSX	Callaway, Cole, Osage	45 min
May 25, 2:22 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Gasconade	53 min
May 25, 2:29 PM CDT	Tornado Warning	LSX	Crawford	61 min
May 25, 2:36 PM CDT	Flash Flood Warning	LSX	Audrain, Boone	6 hr
May 25, 2:42 PM CDT	Tornado Warning	LSX	Audrain, Montgomery, Pike	48 min
May 25, 2:43 PM CDT	Tornado Warning	LSX	Jefferson, Saint Francois, Washington	18 min

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.