Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 158, NWS St. Louis, MO

May 31, 2004Calhoun County, Greene County, Jersey County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 31, 2004, 7:00 PM CDT for Calhoun County, Greene County, Jersey County, Illinois. It was in force for 60 min. 20 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: May 31, 2004, 7:00 PM CDT (00:00 UTC)
Expired: May 31, 2004, 8:00 PM CDT
In force: 60 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Calhoun County, IL, Greene County, IL, Jersey County, IL

The radar

The St Louis radar (KLSX), 65 km from the middle of the area, began a volume at 00:01 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
May 31, 7:20 PM CDT	HAIL 0.75	Jerseyville, IL
May 31, 7:20 PM CDT	HAIL 0.75	Jerseyville, IL
May 31, 7:20 PM CDT	HAIL 0.75	Jerseyville, IL
May 31, 7:20 PM CDT	HAIL 0.75	Jerseyville, IL
May 31, 7:20 PM CDT	HAIL 0.75	Jerseyville, IL
May 31, 7:30 PM CDT	TSTM WND DMG	Roodhouse, IL	NUMEROUS POWER LINES DOWN
May 31, 7:30 PM CDT	TSTM WND DMG	Roodhouse, IL	NUMEROUS POWER LINES DOWN
May 31, 7:30 PM CDT	TSTM WND DMG	Roodhouse, IL	NUMEROUS POWER LINES DOWN
May 31, 7:30 PM CDT	TSTM WND DMG	Roodhouse, IL	NUMEROUS POWER LINES DOWN
May 31, 7:30 PM CDT	TSTM WND DMG	Roodhouse, IL	NUMEROUS POWER LINES DOWN
May 31, 7:30 PM CDT	TSTM WND GST 55	5 S Jerseyville, IL
May 31, 7:30 PM CDT	TSTM WND GST 55	5 S Jerseyville, IL
May 31, 7:30 PM CDT	TSTM WND GST 55	5 S Jerseyville, IL
May 31, 7:30 PM CDT	TSTM WND GST 55	5 S Jerseyville, IL
May 31, 7:30 PM CDT	TSTM WND GST 55	5 S Jerseyville, IL
May 31, 7:35 PM CDT	TSTM WND DMG	Jerseyville, IL	POWER LINES DOWN.
May 31, 7:35 PM CDT	TSTM WND DMG	Jerseyville, IL	POWER LINES DOWN.
May 31, 7:35 PM CDT	TSTM WND DMG	Jerseyville, IL	POWER LINES DOWN.
May 31, 7:35 PM CDT	TSTM WND DMG	Jerseyville, IL	POWER LINES DOWN.
May 31, 7:35 PM CDT	TSTM WND DMG	Jerseyville, IL	POWER LINES DOWN.

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 3 storm reports to this severe thunderstorm warning; the first came 30 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.0 hours before the alert went out and 190 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: 231 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 2205 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 94 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 010000
SVRLSX
ILC013-061-083-010100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
700 PM CDT MON MAY 31 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS
  GREENE COUNTY IN SOUTHWEST ILLINOIS
  JERSEY COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 800 PM CDT

* AT 700 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 18 MILES NORTHWEST OF HARDIN TO
  25 MILES SOUTHWEST OF HARDIN...MOVING EAST AT 20 MPH. THE PRIMARY
  THREAT FROM THIS LINE OF STORMS WILL BE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  HARDIN
  CARROLLTON
  OLD KANE
  JERSEYVILLE
  GREENFIELD

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3952 9059 3920 9062 3917 9071 3894 9069
          3902 9016 3953 9018

$$
FG

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 May 31, 3:40 PM CDT, 3 hours 20 minutes earlier.

Area forecast discussion, May 31, 3:40 PM CDT, 3 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
340 PM CDT MON MAY 31 2004

MDLS ARE IN FAIRLY GD AGREEMENT THAT UA PTRN THRU MUCH OF THIS WORK
WEEK WL BE DOMINATED BY UPR LO...FIRST ANCHORED OVR UPR MS
VLY...THEN OPENING UP A BIT AND DROPPING INTO OHIO VLY.

PERHAPS THE MOST DFCLT PART OF FCST IS TRYING TO PIN DOWN PCPN
THRT.  BLV THAT DIURNALLY DRIVEN -SHRA/-TSRA OVR N AREAS WL DSPT
THIS EVE...WITH THIS PCPN TREND REPEATING ITSELF OVR N AREAS ON TUE.
HWVR...BY TUE EVE AS UPR TROF SAGS INTO AREA THINK THAT SM PCPN WL
CONT INTO THE OVRNGT HRS...AND PERHAPS DROP INTO S AREAS.  AFTER
LOOKING AT THE 18Z SFC MAP...ALSO NOTICED THAT MSTR TO THE S OF THE
STALLED FNTL BNDRY ISNT ALL THAT FAR AWAY...AND A BIT OF RETURN LO
LVL FLOW AHD OF TROF MAY PULL SM OF THAT INSTABILITY BACK INTO OUR
FAR S AREAS.  ALTHO MDL OUTPUT DOESNT PULL THE MSTR AND INSTABILITY
THAT FAR N...THEY OFTEN DO NOT HNDL THIS TYPE OF SITN VRY WELL.

IT APRS THAT LOTS OF CLDS WL DROP SWD ACR AREA ON WED AS UPR TROF
SAGS S.  COULDNT RULE OUT A FEW MORE SHWRS ATTM...BUT AMS DOESNT
LK QUITE AS UNSTBL AS MID LVL TEMPS BGN TO WRM AND XTNSV CLD CVR WL
LIMIT HTG.

TEMPS ON TUE SHUD BE SIMILAR TO THOSE OF TDA...BUT SHUD DROP 5-10
DEGREES BY WED DUE TO THE CLDS AND THE ARRIVAL OF THE COLDER AIR
ASSOC WITH THE UPR TROF.

FOR THE LTR HLF OF THE WEEK...APRS TEMPS SHUD SLOLY MODERATE AS HGTS
RBND ACR AREA.  PTRN MAY BCM ACTIVE ONCE AGAIN BY NXT WEEKEND AS
RETURN FLO BGNS OVRRUNNING OF FNT THAT MDLS SUGGEST WL RMN S OF
CWA.  HOPEFULLY...WELL BE RESTED UP BY THEN.

&&

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

TRUETT

EFFECTIVE 7 AM JUNE 8 2004...THE AWIPS PRODUCT IDENTIFIER FOR THIS
PRODUCT WILL CHANGE FROM AFDSTL TO AFDLSX.  THE WMO HEADER WILL
REMAIN UNCHANGED. PLEASE ENSURE THAT ANY NEEDED CHANGES ARE
COMPLETED BY JUNE 8 2004.

Hazardous weather outlook, May 31, 4:00 PM CDT, 3 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
400 PM CDT MON MAY 31 2004

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-011100-
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-
400 PM CDT MON MAY 31 2004

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

.DAY ONE...TONIGHT
THERE IS A CHANCE FOR THUNDERSTORMS THIS EVENING ACROSS NORTHEAST
MISSOURI AND WEST CENTRAL ILLINOIS AS AN UPPER AIR DISTURBANCE MOVES
ACROSS THE AREA.  THESE STORMS ARE NOT EXPECTED TO BE SEVERE...
ALTHOUGH A FEW MAY PRODUCE SMALL HAIL AND OCCASIONAL LIGHTNING
STRIKES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
THERE IS A CHANCE FOR THUNDERSTORMS ACROSS NORTHEAST MISSOURI AND
WEST CENTRAL ILLINOIS AGAIN ON TUESDAY...AND ACROSS THE ENTIRE AREA
ON TUESDAY NIGHT.  AFTER A WELCOME DRY SPELL THROUGH THE WORK WEEK...
A CHANCE FOR THUNDERSTORMS WILL RETURN ACROSS THE AREA ON SATURDAY
AND SUNDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED FOR TONIGHT.

CARNEY

In the hours before

Local storm report, May 31, 6:41 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
641 PM CDT MON MAY 31 2004

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

0601 PM     TSTM WND GST     QUINCY                  39.93N 91.39W
05/31/2004  57 MPH           ADAMS              IL   OFFICIAL NWS OBS

            57 MPH...49 KT WIND GUST AT KUIN.

0636 PM     TSTM WND DMG     BOWLING GREEN           39.34N 91.20W
05/31/2004                   PIKE               MO   COUNTY OFFICIAL

            LARGE TREE DOWN AT BOWLING GREEN ELEMENTARY SCHOOL.

&&

CVKING

Local storm report, May 31, 6:44 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
644 PM CDT MON MAY 31 2004

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

0629 PM     TSTM WND GST     5 N MOUNT STERLING      40.06N 90.76W
05/30/2004  60 MPH            BROWN             IL   FIRE DEPT/RESCUE

            FIRE CHIEF ESTIMATES WINDS OF 60 MPH ALONG HIGHWAY 99.

&&

GLASS

Local storm report, May 31, 6:44 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
644 PM CDT MON MAY 31 2004

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

0629 PM     TSTM WND GST     5 N MOUNT STERLING      40.06N 90.76W
05/30/2004  0 MPH            BROWN              IL   FIRE DEPT/RESCUE

            FIRE CHIEF ESTIMATES WINDS OF 60 MPH ALONG HIGHWAY 99.

&&

GLASS

Local storm report, May 31, 6:44 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
644 PM CDT MON MAY 31 2004

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

0629 PM     TSTM WND GST     5 N MOUNT STERLING      40.06N 90.76W
05/30/2004  60 MPH            BROWN             IL   FIRE DEPT/RESCUE

            FIRE CHIEF ESTIMATES WINDS OF 60 MPH ALONG HIGHWAY 99.

&&

GLASS

Local storm report, May 31, 6:51 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
651 PM CDT MON MAY 31 2004

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

0642 PM     TSTM WND DMG     EOLIA                   39.24N 91.01W
05/31/2004                   PIKE               MO   TRAINED SPOTTER

            TREE LIMBS BLOWN DOWN

&&

CVKING

Local storm report, May 31, 6:51 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
651 PM CDT MON MAY 31 2004

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

0642 PM     TSTM WND DMG     EOLIA                   39.24N 91.01W
05/31/2004                   PIKE               MO   TRAINED SPOTTER

            TREE LIMBS BLOWN DOWN

&&

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:37 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison	38 min
May 31, 8:02 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	43 min
May 31, 8:36 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	39 min
May 31, 8:38 PM CDT	Severe Thunderstorm Warning	LSX	Madison	52 min
May 31, 8:47 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	43 min
May 31, 10:17 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.