Alert archive / Illinois / Tornado Watches in 2013

Tornado Watch 11

January 29, 201320 counties in Illinois; 6 counties in Kentucky; 14 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jan 29, 2013, 7:13 PM CST for 20 counties in Illinois; 6 counties in Kentucky; 14 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 29, 2013, 7:13 PM CST (01:13 UTC)
Expired
Jan 30, 2013, 1:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
70 kt
All 40 counties

Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 97 km from the middle of the area, began a volume at 01:15 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 29, 8:30 PM CSTSevere Thunderstorm WarningPAHBollinger, Butler, Cape Girardeau, Ripley, Scott, Stoddard and 1 more30 min
Jan 29, 8:46 PM CSTSevere Thunderstorm WarningPAHJackson, Jefferson, Perry29 min
Jan 29, 8:49 PM CSTSevere Thunderstorm WarningPAHBollinger, Butler, Cape Girardeau, Ripley, Scott, Stoddard and 1 more26 min
Jan 29, 8:55 PM CSTTornado WarningPAHBollinger, Stoddard35 min
Jan 29, 8:59 PM CSTSevere Thunderstorm WarningPAHAlexander, Union46 min
Jan 29, 9:05 PM CSTTornado WarningPAHStoddard25 min
Jan 29, 9:08 PM CSTTornado WarningPAHJackson37 min
Jan 29, 9:13 PM CSTSevere Thunderstorm WarningPAHFranklin, Jackson, Jefferson, Perry, Union, Williamson32 min
Jan 29, 9:14 PM CSTTornado WarningPAHUnion31 min
Jan 29, 9:24 PM CSTTornado WarningPAHFranklin, Jefferson, Perry36 min
Jan 29, 9:27 PM CSTTornado WarningPAHAlexander, Pulaski33 min
Jan 29, 9:38 PM CSTTornado WarningPAHFranklin, Jackson, Williamson37 min
Jan 29, 9:43 PM CSTSevere Thunderstorm WarningPAHFranklin, Hamilton, Jackson, Jefferson, Wayne, Williamson32 min
Jan 29, 9:43 PM CSTTornado WarningPAHJohnson, Union47 min
Jan 29, 9:48 PM CSTSevere Thunderstorm WarningPAHAlexander, Johnson, Pulaski27 min
Jan 29, 10:02 PM CSTSevere Thunderstorm WarningPAHEdwards, Franklin, Hamilton, Jefferson, Saline, Wayne and 2 more28 min
Jan 29, 10:04 PM CSTFlash Flood WarningLSXCrawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more12 hr
Jan 29, 10:07 PM CSTTornado WarningPAHSaline, Williamson23 min
Jan 29, 10:14 PM CSTSevere Thunderstorm WarningPAHAlexander, Johnson, Massac, Pulaski31 min
Jan 29, 10:26 PM CSTSevere Thunderstorm WarningPAHEdwards, Gallatin, Hamilton, Saline, Wabash, Wayne and 2 more34 min
Jan 29, 10:29 PM CSTSevere Thunderstorm WarningPAHJohnson, Pope31 min
Jan 29, 10:43 PM CSTSevere Thunderstorm WarningPAHMassac, Pope47 min
Jan 29, 10:46 PM CSTSevere Thunderstorm WarningPAHEdwards, Gallatin, Saline, Wabash, White29 min
Jan 29, 10:57 PM CSTSevere Thunderstorm WarningPAHHardin, Pope48 min
Jan 29, 11:02 PM CSTTornado WarningPAHWabash28 min
Jan 29, 11:05 PM CSTTornado WarningPAHMassac25 min
Jan 29, 11:29 PM CSTTornado WarningPAHCalloway, Graves31 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 1.2 hours before the alert went out and 270 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-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2013-01-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 784 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2013-01-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 508 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
784 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
508 m²/s²
0-3 km storm-relative helicity
586 m²/s²
Significant tornado parameter
3.0
Supercell composite
11.5

Open this sounding in Storm Lab

The text

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

570 
WWUS20 KWNS 300112
SEL1  
SPC WW 300112
ILZ000-KYZ000-MOZ000-300700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 11
NWS STORM PREDICTION CENTER NORMAN OK
715 PM CST TUE JAN 29 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHERN ILLINOIS
       WESTERN KENTUCKY
       SOUTHEAST MISSOURI

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 715 PM
UNTIL 100 AM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTHEAST OF POPLAR
BLUFF MISSOURI TO 10 MILES NORTH OF MOUNT VERNON ILLINOIS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 9...WW 10...

DISCUSSION...LINE OF THUNDERSTORMS OVER SOUTHERN MO IS EXPECTED TO
INTENSIFY DURING THE NEXT FEW HOURS AS THE LOW LEVEL JET BECOMES
VERY STRONG AND THE UPPER LEVEL TROUGH APPROACHES.  DESPITE WEAK
INSTABILITY...90KT+ WINDS IN THE LOWEST 3KM COUPLED WITH EXTREME
SHEAR VALUES WILL PROMOTE A RISK OF DAMAGING WIND GUSTS IN STRONGER
CONVECTIVE ELEMENTS...ALONG WITH A RISK OF ISOLATED EMBEDDED
TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 22050.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 29, 6:08 PM CSTMesoscale DiscussionSPCAlexander, Bond, Champaign, Christian, Clark, Clay and 39 more2 hr
Jan 29, 9:19 PM CSTMesoscale DiscussionSPCAlexander, Clark, Clay, Crawford, Edwards, Franklin and 22 more86 min
Jan 29, 9:35 PM CSTTornado WatchSPCClark, Clay, Crawford, Jasper, Lawrence, Richland6 hr
Jan 29, 9:49 PM CSTMesoscale DiscussionSPCCalloway, Fulton116 min
Jan 30, 12:45 AM CSTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 4 more60 min
Jan 30, 2:33 AM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Boone and 76 more57 min
Jan 30, 3:35 AM CSTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 57 more4 hr
Jan 30, 4:51 AM CSTTornado WatchSPCBath, Bell, Boyd, Breathitt, Carter, Clay and 31 more7 hr
Jan 30, 6:38 AM CSTMesoscale DiscussionSPCBell, Boyd, Breathitt, Carter, Clay, Elliott and 21 more97 min
Jan 29, 8:11 PM CSTMesoscale DiscussionSPCDunklin94 min
Jan 29, 8:29 PM CSTMesoscale DiscussionSPCAtchison4 hr

Nearby

Tornado Watches in Illinois, 2013Tornado Watches in Missouri, 2013Tornado Watches in Kentucky, 2013Every tornado watch in 2013

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.