Alert archive / Illinois / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 44, NWS Lincoln, IL

April 22, 2001Mason County, Tazewell County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 22, 2001, 1:12 AM CDT for Mason County, Tazewell County, Illinois. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Apr 22, 2001, 1:12 AM CDT (06:12 UTC)
Expired: Apr 22, 2001, 2:15 AM CDT
In force: 63 min
Issued by: NWS Lincoln, IL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Mason County, IL, Tazewell County, IL

The radar

The Lincoln radar (KILX), 47 km from the middle of the area, began a volume at 06:32 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.2 hours before the alert went out and 100 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: 1624 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1215 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 220613
SVRSPI
ILC125-179-220715-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
112 AM CDT SUN APR 22 2001

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TAZEWELL COUNTY IN CENTRAL ILLINOIS
  MASON COUNTY IN CENTRAL ILLINOIS

* UNTIL 215 AM CDT

* AT 112 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES NORTHEAST OF HAVANA...MOVING EAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MANITO
  GREEN VALLEY
  SOUTH PEKIN
  PEKIN
  DELAVAN
  TREMONT
  MORTON
  HOPEDALE

THIS STORM IS CAPABLE OF PRODUCING WINDS IN EXCESS OF 60 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...FeOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.

LAT...LON 4052 8986 4027 9009 4036 8934 4066 8938

$$

NNNN
FRIEDERS

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 21, 3:05 PM CDT, 10 hours 7 minutes earlier.

Area forecast discussion, Apr 21, 3:05 PM CDT, 10 hours 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
230 PM CDT SAT APR 21 2001

SURFACE BOUNDARY HAS SET UP FROM NORTHERN ILLINOIS TO QUINCY TO
KANSAS CITY. CONVECTION HAS ALREADY BEGUN TO DEVELOP ALONG THE FRONT
ACROSS MISSOURI AND KANSAS. THIS ACTIVITY EXPECTED TO INCREASE AND
CRAWL EASTWARD ALONG THE FRONT...WITH MAXIMUM CONVERGENCE ACROSS
CENTRAL ZONES. HIGH PRECIPITABLE WATER VALUES AND MODERATE TO STRONG
INSTABILITY WILL RESULT IN SOME LARGE HAIL REPORTS...BUT MAIN THREAT
WILL BE THE HEAVY RAINFALL FROM TRAINING MULTICELLS. WILL ISSUE A
FLASH FLOOD WATCH TONIGHT FROM RUSHVILLE/WINCHESTER THROUGH
SPRINGFIELD TO BLOOMINGTON. AREAS FURTHER NORTH MAY SEE ISOLATED
HEAVY AMOUNTS...BUT THE MAIN FOCUS WILL BE TO THE SOUTH.

AFTER LINGERING ACTIVITY SUNDAY MORNING...ALL MODELS TAKE THE MAIN
SYNOPTIC BOUNDARY TO THE NORTH. THIS IS SUSPECT...SINCE ALL OF THE
OVERNIGHT THUNDERSTORM ACTIVITY MAY REINFORCE THE FRONT FURTHER
SOUTH. WILL KEEP LIKELY POPS FOR THE MORNING HOURS...BUT WILL NOT
COMPLETELY REMOVE THEM FOR THE AFTERNOON. SUNDAY NIGHT SHOULD SEE A
RELATIVE LULL AS FOCUS SHIFTS TO THE NEXT SYSTEM OUT WEST. WILL KEEP
CHANCE POPS IN THE NORTH IN CASE OVERNIGHT ACTIVITY COMES INTO
NORTHERN ILLINOIS.

MODELS ARE ALL TRENDING A LITTLE FASTER WITH THE FRONT THAT COMES
INTO ILLINOIS MONDAY. LOOKS LIKE ANOTHER GOOD SHOT AT THUNDERSTORMS
WITH THIS SYSTEM AS THE BOUNDARY PUSHES INTO THE AREA DURING PEAK
HEATING TIME.

MAIN CHANGE IN THE EXTENDED PORTION OF THE FORECAST WILL BE TO
REMOVE POPS ON TUESDAY...AS IT LOOKS LIKE WE WILL BE DRY-SLOTTED IN
THE WAKE OF THE MONDAY STORM SYSTEM. A SECONDARY SHORTWAVE IS STILL
SLATED FOR WEDNESDAY...SO WILL KEEP CHANCE POPS GOING FOR THEN.
LATTER PART OF THE WEEK LOOKS DRY WILL A SLOW WARMING TREND. MRF
BRINGS THE NEXT FRONT INTO NORTHERN ILLINOIS SATURDAY...SO WILL
INTRODUCE A CHANCE OF RAIN IN THE NORTH.   ..04..

SPI TT 064/080 065/079 048 04+62
PIA TT 061/078 062/075 044 04+73
DEC TT 064/080 065/079 048 04+62
CMI TT 062/081 064/082 050 04+62
MTO TT 062/081 064/082 050 04+62
LWV BT 066/084 067/085 052 04632

.ILX...FLASH FLOOD WATCH TNGTX ZNS 38..40>43..47>53.

In the hours before

Special weather statement, Apr 21, 8:20 PM CDT, 4 hours 52 minutes before

ILZ029-031-036>038-040>057-061>063-066>068-071>073-220145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
820 PM CDT SAT APR 21 2001

THE NATIONAL WEATHER SERVICE HAS CANCELED SEVERE THUNDERSTORM WATCH
NUMBER 163 FOR THE FOLLOWING COUNTIES...

SCOTT...MORGAN...SANGAMON...CHRISTIAN...MACON...MOULTRIE...DOUGLAS...
SHELBY...COLES...EDGAR...CUMBERLAND...CLARK...EFFINGHAM...JASPER...
CRAWFORD...CLAY...RICHLAND...LAWRENCE.

THE SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM FOR THE
FOLLOWING COUNTIES...

SCHUYLER...CASS...MENARD...LOGAN...DEWITT...PIATT...CHAMPAIGN...
VERMILION...FULTON...MASON...TAZEWELL...PEORIA...WOODFORD...AND
MCLEAN.

#

Local storm report, Apr 21, 8:34 PM CDT, 4 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
834 PM CDT SAT APR 21 2001

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

0756 PM    COLFAX                    IL   .75 INCH HAIL
04/21/01   MC LEAN                        REPORTED BY STORM
                                          SPOTTERS.

GEELHART

Special weather statement, Apr 21, 9:05 PM CDT, 4 hours 7 minutes before

ILZ029-031-036>038-040>048-220230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
905 PM CDT SAT APR 21 2001

THE NATIONAL WEATHER SERVICE HAS CANCELED SEVERE THUNDERSTORM WATCH
NUMBER 163 FOR THE FOLLOWING COUNTIES...

SCHUYLER...CASS...MENARD...LOGAN...DEWITT...PIATT...FULTON...MASON...
TAZEWELL...AND PEORIA.

THE SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM FOR THE
FOLLOWING COUNTIES...

CHAMPAIGN...VERMILION...WOODFORD...AND MCLEAN.

Local storm report, Apr 21, 9:36 PM CDT, 3 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN, IL
936 PM CDT SAT APR 21 2001

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

0650 PM    GREEN VALLEY              IL   WIND DAMAGE
04/21/01   TAZEWELL                       IRRIGATION TOWER BLOWN
                                          OVER. LOCATION IS 1 NW OF
                                          GREEN VALLEY. FROM ESDA.

FISHER

Special weather statement, Apr 21, 9:46 PM CDT, 3 hours 26 minutes before

ILZ031-038-045-046-220300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
946 PM CDT SAT APR 21 2001

THE NATIONAL WEATHER SERVICE HAS CANCELED SEVERE THUNDERSTORM WATCH
NUMBER 163W FOR THE FOLLOWING COUNTIES...

CHAMPAIGN...VERMILION...WOODFORD...AND MCLEAN.

FRIEDERS

Local storm report, Apr 22, 12:37 AM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LINCOLN, IL
805 PM CDT SAT APR 21 2001

CORRECTED COUNTY LOCATIONS

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

0605 PM    PEKIN                     IL   1.25 INCH HAIL
04/21/01   TAZEWELL                       REPORTED BY COOP OBSERVER.

0653 PM    4 W BLOOMINGTON           IL   .75 INCH HAIL
04/21/01   MCLEAN                         REPORTED AT BY
                                          MITSUBISHI PLANT.

0707 PM    2 N NORMAL                IL   1.25 INCH HAIL
04/21/01   MCLEAN                         REPORTED BY OFF-DUTY
                                          NWS EMPLOYEE.

0535 PM    METAMORA                  IL   1.00 INCH HAIL
04/21/01   WOODFORD                       REPORTED BY COOP OBSERVER.

0625 PM    MACKINAW                  IL   .88 INCH HAIL
04/21/01   TAZEWELL                       REPORTED BY COOP OBSERVER.

0608 PM    11 WSW SOUTH PEKIN        IL   1.00 INCH HAIL
04/21/01   TAZEWELL                       REPORTED BY ESDA AT SPRING
                                          LAKE.

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 7:23 PM CDT	Tornado Warning	ILX	McLean	52 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2001 Every severe thunderstorm warning in 2001

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.