Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 229, NWS Lincoln, IL

August 2, 2000McLean County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 2, 2000, 4:54 PM CDT for McLean County, Illinois. It was in force for 66 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Aug 2, 2000, 4:54 PM CDT (21:54 UTC)
Expired: Aug 2, 2000, 6:00 PM CDT
In force: 66 min
Issued by: NWS Lincoln, IL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County McLean County, IL

The radar

The Lincoln radar (KILX), 70 km from the middle of the area, began a volume at 21:55 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
Aug 2, 5:05 PM CDT	Hail 0.75	Colfax, 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, 9.9 hours before the alert went out and 41 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: 1064 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1262 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 022154
SVRSPI
ILC113-022300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
454 PM CDT WED AUG 2 2000

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MCLEAN COUNTY IN CENTRAL ILLINOIS

* UNTIL 600 PM CDT

* AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER COOKSVILLE...OR ABOUT 14 MILES EAST OF
  BLOOMINGTON...MOVING SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLFAX
  SAYBROOK

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...FOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.
<
LAT...LON 4065 8878 4036 8878 4034 8849 4060 8848

FRIEDERS

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 Aug 2, 2:30 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Aug 2, 2:30 PM CDT, 2 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
230 PM CDT WED AUG 2 2000

MODELS IN FAIRLY SIMILAR AGREEMENT WITH OVERALL UPPER LEVEL PATTERN
THROUGH 48HRS. DIFFERENCES SEEN ON SFC WITH SPEED AND CRNT FRONT JUST
NORTH OF PIA. AVN FASTEST WITH NGM THEN ETA SLOWEST. SPEED OF
FRONT WILL DEPEND ON IF ANY WAVES DEVELOP ON FRONT...HOLDING
SOUTHWARD PROGRESSION ACRS WRN PARTS OF STATE. BASED ON S/W SEEN ON
WV LOOP AND VERIFIED IN PROFILER DATA...WILL HAVE TO GO WITH SLOWER
SPEED OF FRONT...SO WILL FOLLOW ETA/NGM SOLUTION.

SCT CONVECTION ALREADY GOING AND EXPECTED TO CONTINUE TONIGHT AS
BNDRY MOVING INTO MORE UNSTABLE AIRMASS AND AREAS WITH MOISTURE
CONVERGENCE...ACRS CNTRL IL. INSTABILITY AND MOISTURE VARIABLE FOR
SVR WX...HOWEVER WIND FIELD LACKING...WHICH PROBABLY EXPLAINS LACK
OF SLGT RISK OVR AREA.

FRONT AND CONVECTION SHOULD SLIDE SOUTHEAST TONIGHT AND BE OUT OF
MOST OF CWA BY TOMORROW MORNING. BELIEVE SOUTHEAST COUNTIES WILL
ONLY HAVE A SLIGHT CHANCE OF PCPN IN MORNING BUT FOR CONSISTENCY
WILL LEAVE 30 POPS IN FOR TOMORROW.

HIGH PRSS BUILDS IN TOMORROW AND TOMORROW NIGHT. TEMPS WILL COOL...
BUT NOT AS COOL AS EARLY THIS WEEK. WITH LOTS OF LOW LEVEL MOISTURE
AND AFTERNOON HEATING...DIURNAL CU GOOD POSSIBILITY.

MODELS DROP FRONT ONLY INTO EXTREME SRN IL BY THUR NIGHT...THEN
DROP ANOTHER 500 S/W INTO IL THUR NIGHT. HOWEVER THIS FEATURE REALLY
WEAKENS THROUGH TIME AND WITH SFC FLOW OUT OF EAST LOW LEVELS
SHOULD BE FAIRLY DRY. THEREFORE WILL KEEP POPS OUT FOR NOW AND SEE
WHAT IT LOOKS WITH LATER MODEL RUNS.

FRONT LIFTS BACK NORTH FRIDAY NIGHT INTO SATURDAY AS HIGH MOVES TO
EAST AND WAA KICKS IN...IN THE WEST. TEMPS WARM BACK TO NORMAL FOR
SATURDAY BEFORE NEXT FRONT APPROACHES.

NEW EXTENDED MODELS BRING ANOTHER FRONT INTO IA SUNDAY MORNING
SLIDING SE NEAR CWA SUNDAY NIGHT INTO MONDAY...WILL KEEP POPS FOR
SUNDAY AND INTRODUCE POPS FOR MONDAY. LOOKS LIKE FINALLY GET OUR
HOT WEATHER FOR THE SUMMER THIS WEEKEND.

GUIDANCE TEMPS LOOK GOOD AND CONSISTENT SO WILL ONLY ADJUST FCST
TEMPS LITTLE.

...PRELIMINARY CCF FOR COORDINATION PURPOSES ONLY...

SPI BB 064/084 059/085 064 77610
PIA BB 063/083 058/084 064 77610
DEC BB 064/084 059/085 063 77610
CMI BB 064/083 058/084 062 77610
MTO BB 065/085 060/085 063 77610
LWV BB 066/086 061/086 064 77620

.ILX...NONE.

AUTEN

In the hours before

Special weather statement, Aug 2, 11:10 AM CDT, 5 hours 44 minutes before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-031100-

HAZARDOUS WEATHER OUTLOOK FOR CENTRAL ILLINOIS
NATIONAL WEATHER SERVICE LINCOLN IL
1110 AM CDT WED AUG 2 2000

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP IN CENTRAL ILLINOIS
THIS AFTERNOON AND EVENING.  THE THUNDERSTORMS ARE EXPECTED TO
REMAIN BELOW SEVERE LIMITS.

HEDGES

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 4:34 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	56 min
Aug 2, 5:24 PM CDT	Severe Thunderstorm Warning	ILX	Douglas, Edgar	66 min
Aug 2, 5:39 PM CDT	Severe Thunderstorm Warning	ILX	Coles	51 min
Aug 2, 5:55 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Schuyler	65 min
Aug 2, 6:11 PM CDT	Severe Thunderstorm Warning	ILX	Macon, Moultrie, Piatt	64 min
Aug 2, 6:11 PM CDT	Severe Thunderstorm Warning	ILX	Mason	64 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000 Every 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; radar from the NEXRAD Level II archive.