Alert archive / Illinois / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 25, NWS Lincoln, IL

April 19, 2002Logan County, Macon County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 19, 2002, 8:53 PM CDT for Logan County, Macon County, Sangamon County, Illinois. It was in force for 52 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: Apr 19, 2002, 8:53 PM CDT (01:53 UTC)
Expired: Apr 19, 2002, 9:45 PM CDT
In force: 52 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Logan County, IL, Macon County, IL, Sangamon County, IL

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 19, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.9 hours before the alert went out and 63 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: 49 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1566 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 200153
SVRSPI
ILC107-115-167-200245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
852 PM CDT FRI APR 19 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LOGAN COUNTY IN CENTRAL ILLINOIS
  MACON COUNTY IN CENTRAL ILLINOIS
  SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 945 PM CDT

* AT 852 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER MECHANICSBURG...OR ABOUT 13 MILES EAST OF
  SPRINGFIELD...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ILLIOPOLIS
  LATHAM
  NIANTIC
  BLUE MOUND
  WARRENSBURG
  HARRISTOWN
  MACON
  FORSYTH

THIS STORM IS CAPABLE OF PRODUCING WINDS IN EXCESS OF 70 MPH...
DAMAGING HAIL...FREQUENT LIGHTNING...AND VERY HEAVY RAIN. TAKE
SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER OR ANY STORM DAMAGE TO YOUR LOCAL ESDA...OR THE
NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.

LAT...LON 4003 8951 3994 8948 3983 8947 3977 8933
          3984 8922 3983 8916 3968 8913 3968 8884
          4000 8879

AUTEN

NNNN

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 Apr 19, 2:15 PM CDT, 6 hours 38 minutes earlier.

Area forecast discussion, Apr 19, 2:15 PM CDT, 6 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
215 PM CDT FRI APR 19 2002

MODELS INITIALIZED WELL THIS MORNING AND HAD GOOD RUN TO RUN
CONSISTENCY. ETA MODEL WILL CONTINUE TO BE MODEL OF CHOICE AS HAS
BEEN PAST 36HRS. NGM TOO FAR NORTH AND SLOW WITH NEXT S/W LIFTING
OUT OF OK TOM NITE. AVN TOO FAST. THEREFORE WILL COMPROMISE WITH
ETA SPEED OF NEXT SYSTEM. MAIN QUESTIONS TONIGHT WILL CHC POPS FOR
NORTHERN CWA AND RESULTING TEMPS THROUGH FCST PERIOD AS FRONT STAYS
SOUTH MOST OF CWA THROUGH SUNDAY.

FRONT CURRENTLY FRONT NRN IND TO JUST SOUTH OF I-72 TO CNTRL MO TO
SFC LOW IN ERN KS. CRNT PRSS FALLS INDICATED SFC LOW WILL TRACK ENE
TWRD LSX BY THIS EVENING. MODELS CONSISTENT WITH THIS IDEA AS WELL...
ESPECIALLY THE ETA. THIS LOW LIFTING ENE TONIGHT SHOULD SPREAD PCPN
INTO MAINLY SOUTHERN IL TONIGHT...BUT SOME PCPN COULD SPREAD
NORTHWARD INTO REST OF CWA...THOUGH QPF WONT BE MUCH. CLOUD COVER
ASSOC WITH LOW BACK IN KS WILL ALSO ADVECT INTO CWA TONIGHT KEEPING
US MSTLY CLDY AND MILD ON TEMPS AGAIN...BUT NOT AS WARM AS PAST WEEK.

TOMORROW...FRONT FINALLY PUSHES FAR ENOUGH SOUTH THAT COOLER...MORE
SEASONABLE...AIR WILL ADVECT INTO CWA. PCPN CHANCES HOWEVER WILL
REMAIN ACRS CENTRAL WITH HIGHER POPS IN SOUTH...CLOSER TO FRONT. AS
FRONT PUSHES SOUTH DURING DAY...CHANCES OF PCPN ACRS AREA WILL
DIMINISH FOR ABOUT 12 TO 18 HOURS. ANOTHER SFC LOW WILL BE
DEVELOPING ACRS THE SRN PLAINS SAT AFTERNOON INTO SAT EVENING AND
THEN LIFT OUT SAT NIGHT INTO MO.

MODELS SHOW LARGE AREA OF MOISTURE AND TEMP CONVERGENCE AT 850 NORTH
OF FRONT...ALONG 850 FRONT SAT NIGHT INTO SUNDAY MORNING. THESE
DYNAMICS WILL BEGIN IN NRN MO AND THEN MOVE INTO CNTRL IL OVERNIGHT
AND CONTINUE DURING THE DAY SUNDAY. THIS WILL INCREASES CHCS OF
PCPN ACRS AREA INTO LIKELY CATEGORY FOR LATE SATURDAY AND SUNDAY
MORNING.

SUNDAY...AS LOW MOVES EAST IT WILL DRAG ANOTHER COLD FRONT FURTHER
SOUTH OF AREA AND BRING DRY AND MUCH COOLER TEMPS TO THE AREA FOR
MONDAY AND TUESDAY.

EXTENDED: DRY CONDITIONS AND COOL WX FOR MONDAY AND TUE. MODELS
STILL INDICATE CHC FOR PCPN WED...BUT ARE SLOWING SYSTEM SOME...SO
WILL NEED TO ADD PCPN FOR THUR MORNING AS WELL. FRI LOOKS DRY FOR
NOW.

ETA 2M TEMPS LOOKED GOOD LAST NIGHT SO WILL FOLLOW FOR LOWS
TONIGHT. FWC AND FAN TOO COOL ON TEMPS SO WILL FOLLOW CLOSER TO
MAV...OR SLIGHTLY COOLER...FOR HIGHS.

SPI ET 046/061 044/058 035 77647
PIA EW 045/058 041/054 034 77536
DEC ET 047/060 044/057 035 77647
CMI ET 047/060 044/056 034 77647
MTO ET 048/062 046/059 037 77657
LWV WT 050/065 048/062 039 77767

.ILX...NONE.

AUTEN

In the hours before

Local storm report, Apr 19, 6:53 PM CDT, 2 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
653 PM CDT FRI APR 19 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0636 PM    5 S MT AUBURN             IL   .75 INCH HAIL
04/19/02   CHRISTIAN                      FROM COUNTY SHERIFF.

GOETSCH

Local storm report, Apr 19, 7:08 PM CDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
708 PM CDT FRI APR 19 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0650 PM    BLUE MOUND                IL   1.50 INCH HAIL
04/19/02   MACON                          FROM COUNTY SHERIFF.

GOETSCH

Local storm report, Apr 19, 7:52 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
752 PM CDT FRI APR 19 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0700 PM    BEARDSTOWN                IL   .75 INCH HAIL
04/19/02   CASS                           FROM CITY POLICE.

Local storm report, Apr 19, 8:33 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
833 PM CDT FRI APR 19 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0825 PM    SPRINGFIELD               IL   74 MPH TSTM WIND GUST
04/19/02   SANGAMON                       WIND GUST OF 74 MPH AT THE
                                          SPRINGFIELD AIRPORT FROM
                                          NWS ASOS AUTOMATED
                                          EQUIPMENT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:03 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	42 min
Apr 19, 7:19 PM CDT	Tornado Warning	ILX	Champaign	56 min
Apr 19, 7:25 PM CDT	Severe Thunderstorm Warning	ILX	Cass	50 min
Apr 19, 7:25 PM CDT	Severe Thunderstorm Warning	ILX	Macon	65 min
Apr 19, 7:29 PM CDT	Severe Thunderstorm Warning	ILX	Piatt	46 min
Apr 19, 7:54 PM CDT	Severe Thunderstorm Warning	ILX	Menard, Sangamon	66 min
Apr 19, 7:55 PM CDT	Flash Flood Warning	ILX	Champaign, Douglas	6 hr
Apr 19, 8:05 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	55 min
Apr 19, 8:37 PM CDT	Flash Flood Warning	ILX	Vermilion	5 hr
Apr 19, 8:43 PM CDT	Severe Thunderstorm Warning	ILX	Christian	62 min
Apr 19, 8:45 PM CDT	Flash Flood Warning	ILX	Piatt	5 hr
Apr 19, 8:46 PM CDT	Flash Flood Warning	ILX	Piatt, Sangamon	5 hr
Apr 19, 8:47 PM CDT	Flash Flood Warning	ILX	Piatt	5 hr
Apr 19, 8:49 PM CDT	Flash Flood Warning	ILX	Sangamon	5 hr
Apr 19, 9:00 PM CDT	Flash Flood Warning	ILX	Christian, Macon	5 hr
Apr 19, 9:31 PM CDT	Flash Flood Warning	ILX	DeWitt, Logan	4 hr
Apr 20, 2:09 AM CDT	Flash Flood Warning	ILX	Champaign, Douglas	6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2002 Every severe thunderstorm warning in 2002

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.