Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 316, NWS St. Louis, MO

October 30, 2004Bond County, Clinton County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Oct 30, 2004, 1:35 AM CDT for Bond County, Clinton County, Illinois. It was in force for 40 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: Oct 30, 2004, 1:35 AM CDT (06:35 UTC)
Expired: Oct 30, 2004, 2:15 AM CDT
In force: 40 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Bond County, IL, Clinton County, IL

The radar

The St Louis radar (KLSX), 102 km from the middle of the area, began a volume at 06:36 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.6 hours before the alert went out and 172 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: 1721 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 869 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 325 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 300635
SVRLSX
ILC005-027-300715-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
135 AM CDT SAT OCT 30 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BOND COUNTY IN SOUTH CENTRAL ILLINOIS
  NORTHERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 215 AM CDT

* AT 135 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES WEST OF POCAHONTAS...MOVING EAST AT 55 
  MPH.  AREA LAW ENFORCEMENT REPORTED POWER LINES DOWNED AT 
  COLLINSVILLE AT 115 AM.

* LOCATIONS IMPACTED INCLUDE...
  POCAHONTAS
  GREENVILLE
  RENO
  BEAVER CREEK
  WOBURN

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS...AND HAS DOWNED
NUMEROUS TREES AND POWER LINES. TAKE SHELTER IMMEDIATELY IN THE
INTERIOR PORTION OF A STURDY BUILDING. STAY AWAY FROM OUTSIDE WALLS
AND WINDOWS

LAT...LON 3861 8970 3861 8970 3865 8970 3866 8960
      3887 8959 3888 8963 3899 8963 3902 8950
      3902 8926 3875 8926 3874 8915 3865 8915

$$

TES

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 30, 1:30 AM CDT, 5 minutes earlier.

Area forecast discussion, Oct 30, 1:30 AM CDT, 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
130 AM CDT SAT OCT 30 2004

.DISCUSSION...
CONVECTIVE LINE SEGMENTS MOVG RAPIDLY NEWD THRU THE ERN PTN OF THE
CWA ATTM AHD OF CDFNT.  THIS CONVECTION SHOULD BE JUST E OF THE CWA
BY 4-5 AM AS THE CDFNT MOVS RAPIDLY SEWD THRU THE CWA.  SFC DWPTS
HAVE ALREADY BGN TO FALL IN UIN AND COU JUST W OF THE CDFNT.  THE
SKY IS ALSO RAPIDLY CLRG FM COU TO UIN AS DRY SLOT IS MOVG NEWD THRU
CWA S OF MID-UPR LOW CURRENTLY OVR SWRN MN.  MDLS HINTING AT SOME
WRP ARND LOW LVL CLOUDINESS OVR THE NRN PTN OF THE CWA DRNG THE LT
MRNG AND AFTN HOURS...S-SW OF UPR/SFC LOW MOVG NEWD THRU THE NRN GRT
LKS REGION.  LOW LVL CLOUDS CURRENTLY OVR MUCH OF NEBRASKA AND WRN
IA SHOULD ROTATE SEWD THRU THE NRN PTN OF THE CWA DURG THE LT MRNG
AND AFTN HOURS.  ACRS THE SRN PTN OF THE CWA EXPCT ONLY SCT DIURNAL
CU TDA.  WILL GO WITH WNDY CONDITIONS TDA DUE TO STG SFC PRESSURE
GRADIENT BTWN STG SFC LOW MOVG THRU THE NRN GRT LKS REGION AND SFC
RDG BLDG SEWD INTO THE SRN PLAINS.  SFC WNDS SHOULD BGN TO DIMINISH
BY LT AFTN AS THE PRES GRADIENT BGNS TO SLACKEN AS THE STG SFC LOW
MOVS FURTHER NE OF THE REGION AND THE SFC RDG BLDS INTO SRN MO NRN
AR.  CLOUDS AND PCPN WILL RETURN TO THE CWA SUN AFTN AND NGT AS
LOW-MID LVL WAA INCRS BHND SFC/850 MB RDG IN INCRSG RETURN SLY
FLOW.  ETA MDL DEPICTS STG 850 MB WAA...THETA E ADVCTN AND MOISTURE
CNVG OVR CNTRL MO ARND 06Z MON ON NOSE OF STG SLY LLJ.  BOTH ETA AND
GFS ALSO INDICATES INCRSG UPR LVL DIVERGENCE OVR MUCH OF THE CWA SUN
NGT IN RGT ENTRANCE REGION OF UPR LVL JT STRK MOVG NEWD THRU THE NRN
PLAINS AND GRT LKS REGION.  PLAN TO PUT FAIRLY HI POPS IN FCST FOR
SUN NGT AND MON ESPECIALLY OVR THE SRN HALF OF THE CWA.  ETA MDL IS
A LTL FURTHER N WITH HEAVIER QPF THAN GFS MDL WHICH HAS A MORE SRN
TRACK OF SFC WV ALNG FNT THAN THE ETA.

&&

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

GKS

Hazardous weather outlook, Oct 29, 3:45 PM CDT, 9 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
345 PM CDT FRI OCT 29 2004

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-301100-
ADAMS IL-AUDRAIN-BOND IL-BOONE-BROWN-CALHOUN IL-CALLAWAY-CLINTON IL-
COLE-CRAWFORD-FAYETTE IL-FRANKLIN-GASCONADE-GREENE IL-IRON-JEFFERSON-
JERSEY IL-KNOX-LEWIS-LINCOLN-MACOUPIN IL-MADISON-MADISON IL-MARION-
MARION IL-MONITEAU-MONROE-MONROE IL-MONTGOMERY-MONTGOMERY IL-OSAGE-
PIKE-PIKE IL-RALLS-RANDOLPH IL-REYNOLDS-SHELBY-ST CHARLES-
ST CLAIR IL-ST FRANCOIS-ST LOUIS-ST LOUIS CITY-STE GENEVIEVE-WARREN-
WASHINGTON-WASHINGTON IL-
345 PM CDT FRI OCT 29 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST...CENTRAL
AND SOUTHEAST MISSOURI...AS WELL AS PARTS OF WEST CENTRAL AND
SOUTHWEST ILLINOIS.

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT.
THUNDERSTORMS ARE EXPECTED TO DEVELOP IN THE UNSEASONABLY WARM...
HUMID AND UNSTABLE ENVIRONMENT AHEAD OF A COLD FRONT WHICH WILL BE
MOVING SOUTHEASTWARD THROUGH THE REGION TONIGHT. THE PRIMARY THREAT
FROM THESE STORMS WILL BE DAMAGING WINDS AND LARGE HAIL. .

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS A CHANCE OF THUNDERSTORMS ON SUNDAY NIGHT AND MONDAY.

.SPOTTER ACTIVATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

In the hours before

Local storm report, Oct 29, 7:44 PM CDT, 5 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
744 PM CDT FRI OCT 29 2004

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

0545 PM     TSTM WND DMG     3 S LOUISIANA           39.40N 91.06W
10/29/2004                   PIKE               MO   LAW ENFORCEMENT

            SEVERAL TREES DOWN ON COUNTY ROUTE D.

0545 PM     TSTM WND DMG     8 N HARDIN              39.27N 90.62W
10/29/2004                   CALHOUN            IL   LAW ENFORCEMENT

            ON STATE HIGHWAY 100 BETWEEN KAMPSVILLE AND MICHAEL.
            TREES DOWN ON HIGHWAY. COMMERICAL POWER LOST IN ALL OF
            COUNTY...PARTIALLY RESTORED AT 610 PM.

0555 PM     TSTM WND DMG     2 SE PLEASANT HILL      39.42N 90.85W
10/29/2004                   PIKE               IL   LAW ENFORCEMENT

            ON STATE ROUTE 96 NEAR PEA RIDGE ELK FARM NEAR BAY CREEK.
            POWER LINES DOWN...TREES DOWN.

0600 PM     TSTM WND DMG     1 N HARDIN              39.17N 90.62W
10/29/2004                   CALHOUN            IL   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ALONG STATE HIGHWAY 96.

0610 PM     TSTM WND DMG     1 W CARROLLTON          39.30N 90.43W
10/29/2004                   GREENE             IL   LAW ENFORCEMENT

            LARGE TREE BRANCHES DOWN ON LONE OAK GOLF COURSE.

&&

WDB

Special weather statement, Oct 29, 10:04 PM CDT, 3 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1004 PM CDT FRI OCT 29 2004

MOC007-019-027-051-103-111-127-135-137-173-205-300330-
AUDRAIN-BOONE-CALLAWAY-COLE-KNOX-LEWIS-MARION-MONITEAU-MONROE-RALLS-
SHELBY-
1004 PM CDT FRI OCT 29 2004

...TORNADO WATCH 871 HAS EXPIRED...

THE NATIONAL WEATHER SERVICE HAS ALLOWED TORNADO WATCH 871
TO EXPIRE AT 10 PM CDT.  THE FOLLOWING COUNTIES IN MISSOURI ARE NO
LONGER IN A TORNADO WATCH...

AUDRAIN           BOONE            CALLAWAY
COLE              KNOX             LEWIS
MARION            MONITEAU         MONROE
RALLS             SHELBY

ALTHOUGH SCATTERED THUNDERSTORMS ARE POSSIBLE FOR A FEW MORE HOURS...
THE THREAT OF SEVERE WEATHER HAS DIMINISHED.  GUSTS TO 45 MPH AND
PEA SIZED HAIL ARE STILL POSSIBLE IN SOME OF THE STRONGER STORMS.

TES

Local storm report, Oct 30, 12:52 AM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1252 AM CDT SAT OCT 30 2004

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

0535 PM     TSTM WND DMG     1 S ELLINGTON           37.22N 90.97W
10/29/2004                   REYNOLDS           MO   LAW ENFORCEMENT

            TREES DOWN ON HIGHWAY 21 SOUTH OF ELLINGTON.

&&

WDB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 30, 12:46 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	44 min
Oct 30, 1:13 AM CDT	Severe Thunderstorm Warning	LSX	Madison	47 min
Oct 30, 2:01 AM CDT	Severe Thunderstorm Warning	LSX	Fayette	29 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2004 Every severe thunderstorm warning in 2004

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.