Alert archive / Illinois / Tornado Warnings in 2011

Tornado Warning 8, NWS Paducah, KY

February 28, 2011Jefferson County, Illinois

NWS Paducah, KY issued this tornado warning at Feb 28, 2011, 12:14 AM CST for Jefferson County, Illinois. It was in force for 46 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: Feb 28, 2011, 12:14 AM CST (06:14 UTC)
Expired: Feb 28, 2011, 1:00 AM CST
In force: 46 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon

County Jefferson County, IL

The radar

The Evansville,IN radar (KVWX), 111 km from the middle of the area, began a volume at 06:16 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
Feb 28, 12:45 AM CST	TSTM WND DMG	Mount Vernon, IL	ONE POWER POLE AND LINE DOWN IN TOWN.
Feb 28, 1:01 AM CST	HAIL 0.75	Mount Vernon, IL	DIME SIZE HAIL REPORTED AT INTERSECTION OF HWY 148 AND INTERSTATE 57.

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
Feb 27, 9:40 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.2 hours before the alert went out and 202 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: 124 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

814 
WFUS53 KPAH 280614
TORPAH
ILC081-280700-
/O.NEW.KPAH.TO.W.0008.110228T0614Z-110228T0700Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
1214 AM CST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* TORNADO WARNING FOR...
  JEFFERSON COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 100 AM CST.

* AT 1209 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO ALONG A
  LINE EXTENDING FROM 27 MILES NORTHWEST OF WOODLAWN TO 22 MILES WEST
  OF WOODLAWN TO 30 MILES WEST OF WOODLAWN...MOVING EAST AT 65 MPH.

  THIS LINE HAS A HISTORY OF PRODUCING 60 MPH WINDS IN CLINTON       
  COUNTY...AND STRUCTURAL DAMAGE IN THE ST. LOUIS METRO AREA.

* LOCATIONS IN THE WARNING INCLUDE...
  WOODLAWN...
  MOUNT VERNON...
  BLUFORD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NOW IS THE TIME TO IMPLEMENT YOUR TORNADO PLAN OF ACTION. SEEK
SHELTER INDOORS IN A BASEMENT...OR IN AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A HOME OR BUILDING.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3848 8871 3818 8871 3822 8916 3827 8916
      3827 8915 3847 8915 3848 8914
TIME...MOT...LOC 0613Z 271DEG 58KT 3859 8932 3843 8933
          3828 8951

$$

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 27, 8:53 PM CST	Severe Thunderstorm Warning	PAH	Johnson, Pope, Saline, Williamson	25 min
Feb 27, 9:23 PM CST	Severe Thunderstorm Warning	PAH	Franklin, Hamilton, Jefferson, Wayne, Williamson	37 min
Feb 27, 9:47 PM CST	Severe Thunderstorm Warning	PAH	Edwards, Hamilton, Wayne	28 min
Feb 28, 12:38 AM CST	Tornado Warning	PAH	Franklin, Jefferson, Perry	37 min
Feb 28, 12:46 AM CST	Tornado Warning	PAH	Hamilton, Wayne, White	44 min
Feb 28, 12:53 AM CST	Tornado Warning	PAH	Wayne	37 min
Feb 28, 1:12 AM CST	Tornado Warning	PAH	Edwards, Wabash	33 min
Feb 28, 1:32 AM CST	Tornado Warning	PAH	Jackson, Union	43 min
Feb 28, 1:35 AM CST	Tornado Warning	PAH	Wabash	40 min
Feb 28, 2:02 AM CST	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Johnson, Union, Williamson	28 min
Feb 28, 12:06 PM CST	River Flood Warning	PAH	Massac, Pope	29 days
Feb 28, 12:06 PM CST	River Flood Warning	PAH	Alexander	19 days

Nearby

Tornado Warnings in Illinois, 2011 Every tornado warning in 2011 Tornadoes 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.