Alert archive / Illinois / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 244, NWS St. Louis, MO

October 18, 20075 counties in Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Oct 18, 2007, 7:26 PM CDT for 5 counties in Illinois. It was in force for 49 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: Oct 18, 2007, 7:26 PM CDT (00:26 UTC)
Expired: Oct 18, 2007, 8:15 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Marion County, IL, Washington County, IL

The radar

The Evansville,IN radar (KVWX), 127 km from the middle of the area, began a volume at 00:26 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
Oct 18, 8:00 PM CDT	FUNNEL CLOUD	2 Sw St. Peter, IL	UNCONFIRMED REPORT RELAYED BY STATE POLICE.
Oct 18, 8:00 PM CDT	TSTM WND DMG	2 S Carlyle, IL	TREE DOWN BLOCKING HIGHWAY 127

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 34 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Oct 18, 3:23 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 162 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: 38 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 2442 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 113 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.

000 
WUUS53 KLSX 190026
SVRLSX
ILC005-027-051-121-189-190115-
/O.NEW.KLSX.SV.W.0244.071019T0026Z-071019T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
726 PM CDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS
  EASTERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS
  SOUTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS
  MARION COUNTY IN SOUTH CENTRAL ILLINOIS
  NORTHWESTERN WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 815 PM CDT

* AT 723 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 5 MILES SOUTH OF BEAVER 
  CREEK TO BECKEMEYER TO OKAWVILLE...AND MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOULDER...
  WAMAC...
  CENTRALIA...
  CENTRAL CITY...
  SHOBONIER...
  SANDOVAL...
  ODIN...
  FAIRMAN...
  SALEM...
  BROWNSTOWN...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

IF YOU ARE IN A MOBILE HOME...YOU SHOULD TAKE SHELTER IN A NEARBY
STURDY BUILDING.

LAT...LON 3867 8871 3830 8963 3854 8950 3875 8948
      3915 8881 3892 8882 3891 8870
TIME...MOT...LOC 0026Z 234DEG 54KT 3873 8937 3861 8938
          3845 8947

$$

CARNEY

2 follow-up statements

000 
WWUS53 KLSX 190054
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
754 PM CDT THU OCT 18 2007

ILC005-027-051-121-189-190115-
/O.CON.KLSX.SV.W.0244.000000T0000Z-071019T0115Z/
WASHINGTON IL-CLINTON IL-MARION IL-BOND IL-FAYETTE IL-
754 PM CDT THU OCT 18 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHERN FAYETTE...SOUTHEASTERN BOND...MARION...EASTERN CLINTON
AND NORTHWESTERN WASHINGTON COUNTIES...

AT 753 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM BROWNSTOWN TO ST. PAUL TO CENTRAL
CITY...MOVING NORTHEAST AT 60 MPH.

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...ST.
PETER...ST. JAMES...ST. ELMO...ODIN...SALEM...TONTI...ST. PETER...
SELMAVILLE...KINMUNDY AND BRUBAKER.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3867 8871 3830 8963 3854 8950 3875 8948
      3915 8881 3892 8882 3891 8870
TIME...MOT...LOC 0054Z 234DEG 54KT 3899 8895 3885 8894
          3854 8916

$$

CARNEY

000 
WWUS53 KLSX 190115
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
815 PM CDT THU OCT 18 2007

ILC005-027-051-121-189-190125-
/O.EXP.KLSX.SV.W.0244.000000T0000Z-071019T0115Z/
WASHINGTON IL-CLINTON IL-MARION IL-BOND IL-FAYETTE IL-
815 PM CDT THU OCT 18 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FAYETTE...
SOUTHEASTERN BOND...MARION...EASTERN CLINTON AND NORTHWESTERN
WASHINGTON COUNTIES EXPIRES AT 815 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM.

LAT...LON 3867 8871 3830 8963 3854 8950 3875 8948
      3915 8881 3892 8882 3891 8870
TIME...MOT...LOC 0115Z 234DEG 54KT 3917 8862 3903 8861
          3872 8883

$$

CARNEY

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 18, 6:28 PM CDT, 58 minutes earlier.

Area forecast discussion, Oct 18, 6:28 PM CDT, 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
628 PM CDT THU OCT 18 2007

.DISCUSSION...
A DEEP LOW PRESSURE SYSTEM WAS LOCATED OVER EAST CENTRAL MN THIS
AFTERNOON. DRIER AIR WAS WRAPPING AROUND THE SYSTEM WITH DEWPOINTS
IN THE 50S ACROSS MOST OF THE AREA EXCEPT ACROSS THE EASTERN OZARKS
AND A PORTION OF SOUTHWEST IL. EXPECT SCATTERED SHOWERS AND
THUNDERSTORMS WILL DEVELOP ACROSS THIS REGION LATER THIS AFTERNOON. THE
LATEST LAPS DATA INDICATED THE BEST INSTABILITY ACROSS SOUTHEAST
MO/SOUTHWEST IL WITH WEAK CAPE.

SURFACE LOW WILL MOVE SLOWLY NORTHEASTWARD TONIGHT AND ON FRIDAY
UNDER CLOSED UPPER LOW. HIGH PRESSURE WILL BUILD ACROSS THE SOUTHERN
STATES ON FRIDAY AND PERSIST ON SATURDAY. THE CIRCULATION AROUND
THIS SYSTEM WILL BRING WARMER AIR BACK INTO THE REGION FOR SATURDAY
AND SUNDAY WITH HIGH TEMPS 10 TO 15 DEGREES ABOVE NORMAL.

NEXT SHORT WAVE IS FORECAST TO MOVE ACROSS THE WESTERN U.S. ON
SATURDAY AND THEN DIG INTO THE 4 CORNERS AREA BY SUNDAY MORNING. THE
ECMWF MODEL HAS BEEN FAIRLY CONSISTENT PAST SEVERAL RUNS IN
FORECASTING MORE DEEPENING WITH THIS SYSTEM. THIS WILL SLOW DOWN THE
COLD FRONT IN COMPARISON TO THE GFS AND NAM MODEL RUNS. THIS WOULD
PLACE THE FRONT FROM SOUTHEAST WI ACROSS EASTERN MO INTO NORTHEAST
TX MONDAY MORNING. BOTH THE GFS AND ECMWF FORECAST TREMENDOUS
SYNOPTIC SCALE FORCING DURING THE SUNDAY NIGHT/MONDAY TIME FRAME AS
DEEP UPPER TROF AFFECTS THE REGION.

TPS

&&

.AVIATION...
FOR THE 00Z TAFS...
STRONGEST STORMS HAVE MOVED EAST OF KSTL/KSUS...BUT ADDITIONAL
STRONG STORMS ARE MOVING RAPIDLY NEWD ACROSS CNTRL AND NERN MO AND
W CNTRL IL. HAVE TEMPO GROUPS TO COVER TSRA AT KCOU/KUIN THROUGH
02Z...WITH SOME POTENTIAL FOR GS AND SWLY WIND GUSTS OVER 35KTS.
CHC FOR TSRA SHOULD DIMINISH BY MID EVENING WITH LOSS OF DAYTIME
HEATING...THOUGH W-SWLY WINDS WILL CONTINUE AT 10-14KTS SUSTAINED
THE REST OF THE NIGHT. DO EXPECT MVFR CIGS WITH LOW CLOUDS NOW
OVER NRN MO AND IA TO ROTATE INTO ALL THE TAF SITES LATER THIS
EVENING AND TONIGHT.

BRITT

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
IL...NONE.
&&

WFO LSX

Hazardous weather outlook, Oct 18, 3:51 PM CDT, 3 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
351 PM CDT THU OCT 18 2007

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-191215-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX-LEWIS-
SHELBY-MARION-MONROE-RALLS-PIKE-BOONE-AUDRAIN-MONITEAU-COLE-OSAGE-
CALLAWAY-MONTGOMERY-LINCOLN-GASCONADE-WARREN-ST. CHARLES-FRANKLIN-
ST. LOUIS-ST. LOUIS CITY-JEFFERSON-CRAWFORD-WASHINGTON-
ST. FRANCOIS-STE. GENEVIEVE-IRON-MADISON-REYNOLDS-
351 PM CDT THU OCT 18 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS WILL CONTINUE THIS EVENING ACROSS POSTIONS
OF SOUTHWEST ILLINOIS AND SOUTHEAST MISSOURI. A FEW OF THESE STORMS WILL
BE SEVERE...CAPABLE OF PRODUCING DAMAGING WIND GUSTS TO 70 MPH.
A TORNADO IS POSSIBLE ACROSS SOUTHWEST ILLINOIS.

FOR FURTHER INFORMATION ON CONVECTIVE WATCHES...PLEASE
REFER TO THE STORM PREDICTION CENTER WEBPAGE AT (ALL LOWERCASE)...
HTTP://WWW.SPC.NOAA.GOV/PRODUCTS/WATCH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE FOR THUNDERSTORMS SUNDAY NIGHT THROUGH MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS EVENING ACROSS PORTIONS OF
SOUTHWEST ILLINOIS.

&&

FOR A GRAPHICAL VERSION OF THIS INFORMATION SEE OUR
WEBPAGE AT (LOWERCASE)... HTTP://WWW.WEATHER.GOV/LSX/?N=HWO1

In the hours before

Local storm report, Oct 18, 4:52 PM CDT, 2 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
452 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     HAIL             NOKOMIS                 39.30N 89.29W
10/18/2007  E1.00 INCH       MONTGOMERY         IL   TRAINED SPOTTER

&&

MILLER

Local storm report, Oct 18, 5:01 PM CDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
501 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     HAIL             BELLEVILLE              38.53N 90.00W
10/18/2007  E0.75 INCH       ST. CLAIR          IL   PUBLIC

            AT SCOTT AFB

&&

MILLER

Local storm report, Oct 18, 5:12 PM CDT, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
512 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     TSTM WND DMG     FREDERICKTOWN           37.56N 90.30W
10/18/2007                   MADISON            MO   TRAINED SPOTTER

            WIDESPREAD WIND DAMAGE IN TOWN. 1 FOOT DIAMETER TREES
            DOWN BLOCKING ROADS AND POWER LINES DOWN.

&&

MILLER

Local storm report, Oct 18, 5:31 PM CDT, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
531 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     TSTM WND DMG     FREDERICKTOWN           37.56N 90.30W
10/18/2007                   MADISON            MO   PUBLIC

            MAJOR DAMAGE TO TREES AND POWER LINES IN DEERWOOD
            ESTATES. RELAYED BY MEDIA.

0510 PM     HAIL             GREENVILLE              38.89N 89.40W
10/18/2007  E1.75 INCH       BOND               IL   LAW ENFORCEMENT

            AT THE INTERSECTION OF HIGHWAYS 127 AND 140.

&&

BRITT

Local storm report, Oct 18, 5:37 PM CDT, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
537 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     TSTM WND DMG     HIGHLAND                38.74N 89.68W
10/18/2007                   MADISON            IL   TRAINED SPOTTER

            LARGE TREES UP TO 2 FOOT IN DIAMETER BROKEN OFF HALF WAY
            UP...WITH NUMEROUS OTHER SMALL BRANCHES DOWN THROUGHOUT
            TOWN.

&&

BRITT

Local storm report, Oct 18, 5:56 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
556 PM CDT THU OCT 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     GREENVILLE              38.89N 89.40W
10/18/2007                   BOND               IL   TRAINED SPOTTER

            LARGE TREES AND BRANCHES BROKEN OR BENT OVER.

0515 PM     HAIL             GREENVILLE              38.89N 89.40W
10/18/2007  E0.88 INCH       BOND               IL   TRAINED SPOTTER

0520 PM     TORNADO          MULBERRY GROVE          38.92N 89.27W
10/18/2007                   BOND               IL   PUBLIC

            UNCONFIRMED REPORTED RELAYED BY COUNTY SHERIFF.

&&

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 18, 7:02 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	13 min
Oct 18, 7:40 PM CDT	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion	35 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2007 Every severe thunderstorm warning in 2007

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.