Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 311, NWS Lincoln, IL

October 4, 2000Clay County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 4, 2000, 9:55 AM CDT for Clay County, Illinois. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Oct 4, 2000, 9:55 AM CDT (14:55 UTC)
Expired
Oct 4, 2000, 10:30 AM CDT
In force
35 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Clay County, IL

What was reported inside it

TimeReportWhereRemark
Oct 4, 10:00 AM CDTHail 0.88Louisville, IL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 2.9 hours before the alert went out and 156 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, Lincoln, IL at 12:00Z on 2000-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Lincoln, IL at 12:00Z on 2000-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
521 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
114 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 KILX 041457
SVRSPI
ILC025-041530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
ISSUED BY NWS CHICAGO IL
955 AM CDT WED OCT 4 2000

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 1030 AM CDT

* AT 955 AM CDT A SEVERE THUNDERSTORM WAS NEAR LOUISVILLE MOVING EAST
AT 30 MPH. LARGE HAIL CAN BE EXPECxTED WITH THIS STORM.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LOUISVILLE
  SAILOR SPRINGS

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 Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 4, 2:55 AM CDT, 7 hours earlier.

Area forecast discussion, Oct 4, 2:55 AM CDT, 7 hours before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
255 AM CDT WED OCT 4 2000

WEATHER SEEMS TO BE PROGRESSING ON SCHEDULE...AND THE 00Z MODEL
OUTPUT HAS NO BIG SURPRISES EITHER. CURRENT BAND OF CONVECTION IS
ASSOCIATED WITH A STRONG SHORTWAVE NOW LIFTING INTO SOUTHWESTERN
WISCONSIN. EXPECT A RELATIVE LULL IN PRECIPITATION LATER TODAY AS
THIS SHORTWAVE PULLS AWAY AND LOW LEVEL INFLOW WEAKENS. THIS
AFTERNOON...FRONTAL BOUNDARY WILL STILL BE ACROSS THE SOUTHERN
PORTIONS OF THE AREA...AND WATER VAPOR LOOPS INDICATE A PERSISTANT
PLUME OF MIDDLE AND UPPER LEVEL MOISTURE FROM COLORADO TO ILLINOIS.
WILL HOLD ON TO CHANCE POPS OVER NORTHERN AREAS WITH LIKELY POPS IN
THE SOUTH. WILL LET LATE RADAR TRENDS DICTATE MORNING WORDING.

NEXT SHORTWAVE OVER IDAHO WILL COMBINE WITH ENERGY EJECTING FROM
SOUTHERN ROCKIES TO BRING ANOTHER ROUND OF WIDESPREAD RAIN AND
EMBEDDED THUNDERSTORMS TONIGHT INTO THURSDAY. WILL CONTINUE WITH
HIGH POPS AREA-WIDE.

ETA AND AVN MODELS BRING IN DRY AIR LATE THURSDAY NIGHT AND EARLY
FRIDAY AS THE DEEPER COLD AIR SURGES SOUTH FROM CANADA. WILL CARRY A
CHANCE POPS IN SOUTHEAST ZONES EARLY FRIDAY...WITH DRY AND COLD
CONDITIONS FURTHER NORTH.

EXTENDED PERIODS WILL BE TRICKY. LATER PERIODS OF THE AVN BRING A
SIGNIFICANT SHORTWAVE FROM THE DAKOTAS INTO SOUTHEAST MINNESOTA BY
FRIDAY EVENING. SO FAR...THE AVN KEEPS MOST OF THE ENERGY FROM THIS
SYSTEM TO OUR NORTH. HOWEVER...IF THE TROUGH DEEPENS MORE THAN
FORECAST...LIGHT PRECIPITATION WILL COME SOUTH INTO CENTRAL
ILLINOIS. LOW-LEVEL TEMPERATURE PROFILES AND DEEP LAYER THICKNESS
PROGS SUGGEST PRECIPITATION WOULD BE SNOW IN THE NORTH AND A MIX IN
THE CENTRAL AND SOUTH.   ..04..

SPI RR 070/054 065/042 048 04++8
PIA RR 065/050 062/040 045 04++8
DEC RR 070/054 065/042 048 04++8
CMI RR 068/052 064/045 048 04++8
MTO RR 068/052 064/045 048 04++8
LWV RR 080/058 070/048 051 04686

.ILX...NONE.

In the hours before

Special weather statement, Oct 4, 6:00 AM CDT, 3 hours 55 minutes before
ILZ027>031-036>038-040>057-061>063-066>068-071>073-041600-

HAZARDOUS WEATHER OUTLOOK FOR CENTRAL ILLINOIS
NATIONAL WEATHER SERVICE LINCOLN IL
600 AM CDT WED OCT 4 2000

RAIN AND THUNDERSTORMS ARE FORECAST TO CONTINUE TO THE NORTH OF A
COLD FRONT LOCATED IN SOUTHERN ILLINOIS. THE PRECIPITATION WILL BE
SCATTERED DURING THE DAYLIGHT HOURS...BUT WILL LIKELY INCREASE IN
COVERAGE TONIGHT. ALTHOUGH NO SEVERE STORMS ARE EXPECTED...LOCALLY
HEAVY RAIN WILL BE POSSIBLE.

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 3, 9:58 PM CDTSevere Thunderstorm WarningILXKnox47 min
Oct 3, 10:29 PM CDTSevere Thunderstorm WarningILXPeoria, Stark46 min
Oct 3, 11:03 PM CDTSevere Thunderstorm WarningILXMarshall42 min
Oct 3, 11:25 PM CDTSevere Thunderstorm WarningILXKnox35 min
Oct 4, 4:31 PM CDTSevere Thunderstorm WarningILXCumberland, Jasper29 min
Oct 4, 4:46 PM CDTSevere Thunderstorm WarningILXClark, Crawford59 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.