Alert archive / Illinois / Tornado Warnings in 2015

Tornado Warning 43, NWS St. Louis, MO

July 11, 2015Greene County, Illinois

NWS St. Louis, MO issued this tornado warning at Jul 11, 2015, 5:52 PM CDT for Greene County, Illinois. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 11, 2015, 5:52 PM CDT (22:52 UTC)
Expired: Jul 11, 2015, 6:15 PM CDT
In force: 23 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Greene County, IL

The radar

The St Louis radar (KLSX), 90 km from the middle of the area, began a volume at 22:53 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 11, 1:39 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.9 hours before the alert went out and 160 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: 935 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 53 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.

738 
WFUS53 KLSX 112252
TORLSX
ILC061-112315-
/O.NEW.KLSX.TO.W.0043.150711T2252Z-150711T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
552 PM CDT SAT JUL 11 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN GREENE COUNTY IN SOUTHWESTERN ILLINOIS...

* UNTIL 615 PM CDT
    
* AT 552 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR ATHENSVILLE...MOVING SOUTHEAST AT 20 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS DANGEROUS STORM WILL BE NEAR...
  ATHENSVILLE AROUND 605 PM CDT.
  GREENFIELD AROUND 610 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3948 9015 3932 9015 3931 9016 3944 9038
      3952 9030
TIME...MOT...LOC 2252Z 301DEG 19KT 3946 9028 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

CARNEY

1 follow-up statement

028 
WWUS53 KLSX 112307
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
607 PM CDT SAT JUL 11 2015

ILC061-112316-
/O.EXP.KLSX.TO.W.0043.000000T0000Z-150711T2315Z/
GREENE IL-
607 PM CDT SAT JUL 11 2015

...THE TORNADO WARNING FOR NORTHEASTERN GREENE COUNTY WILL EXPIRE AT
615 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHWESTERN ILLINOIS.

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

LAT...LON 3948 9015 3932 9015 3931 9016 3944 9038
      3952 9030
TIME...MOT...LOC 2304Z 301DEG 19KT 3946 9028 

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:47 PM CDT	Special Weather Statement	LSX	Adams, Brown	43 min
Jul 11, 1:07 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	38 min
Jul 11, 2:08 PM CDT	Special Weather Statement	LSX	Brown	52 min
Jul 11, 2:14 PM CDT	Severe Thunderstorm Warning	LSX	Brown, Pike	28 min
Jul 11, 3:19 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	41 min
Jul 11, 3:30 PM CDT	Heat Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	3 days
Jul 11, 3:56 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	49 min
Jul 11, 4:31 PM CDT	Areal Flood Advisory	LSX	Greene, Macoupin	4 hr
Jul 11, 4:53 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	67 min
Jul 11, 5:11 PM CDT	Flash Flood Warning	LSX	Greene, Macoupin	6 hr
Jul 11, 5:37 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	38 min
Jul 11, 6:20 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	40 min
Jul 11, 6:39 PM CDT	Severe Thunderstorm Warning	LSX	Brown	18 min

Nearby

Tornado Warnings in Illinois, 2015 Every tornado warning in 2015 Tornadoes in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.