Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 260, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 17, 2000, 7:00 PM CDT for Macon County, Illinois. It was in force for 60 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 17, 2000, 7:00 PM CDT (00:00 UTC)
- Expired
- Aug 17, 2000, 8:00 PM CDT
- In force
- 60 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Macon County, IL
The radar
The Lincoln radar (KILX), 38 km from the middle of the area, began a volume at 00:05 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 17, 7:28 PM CDT | Thunderstorm Wind | Forsyth, IL | Numerous trees and power lines were blown down, as well as a shed. A house under construction was also damaged. The extent of damage to the house was not known. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 17, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.0 hours before the alert went out and 42 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.
- Mixed-layer CAPE
- 4438 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 18.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KILX 180000 SVRSPI ILC115-180100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LINCOLN IL 700 PM CDT THU AUG 17 2000 THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MACON COUNTY IN CENTRAL ILLINOIS * UNTIL 800 PM CDT * AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 12 MILES NORTHWEST OF DECATUR TO 10 MILES SOUTHWEST OF DECATUR...MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORMS WILL BE NEAR... FORSYTH MAROA DECATUR MOUNT ZION OREANA LONG CREEK ARGENTA 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 4005 8913 3974 8911 3972 8884 4005 8878 GOETSCH 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 17, 2:55 PM CDT, 4 hours 5 minutes earlier.
Area forecast discussion, Aug 17, 2:55 PM CDT, 4 hours 5 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 255 PM CDT THU AUG 17 2000 MOST CONCERNS WITH THE WEATHER EXIST IN THE MESOSCALE SHORT-TERM... WITH TSRA EXPECTED LATER THIS AFT AND THIS EVE AS THE CAP ERODES. WITH THE UPCOMING FCST PACKAGE...CONCERNS REST ON ENDING PCPN CHANCES...CLOUD TRENDS AND INTRODUCTION OF PCPN LATER IN EXTENDED. 18Z SFC ANALYSIS SHOWS LOW PRES CENTER INVOF MOLINE. CF STRETCHES FM NERN MO TO NEAR KC TO TX PANHANDLE. WF APPEARS TO HAVE NOW LIFTED NORTH OF ILX CWA. CU DEVELOPMENT FM GALESBURG TO PONTIAC MAY MARK THE TRUE 19Z POSITION. FARTHER SOUTH...THE ATMOSPHERE IS CAPPED. THE SOUNDING SUGGESTS THAT CONVECTIVE TEMPS SOUTH OF THE FRONT ARE IN THE MID 90S. WITH SPI AT 94 ATTM...THE CAP SOON TO BREAK...WITH CAPES OF 3000+. W/V SAT LOOP SHOWS WEAKENING SHORTWAVE NEAR BURLINGTON CONT RAPID EWRD MOVEMENT. NRN PLAINS SHORTWAVE KICKING THIS FEATURE EWRD. SPC CONT TO MONITOR OUR REGION FOR POSSIBILITY OF SVR WX THIS AFT-EVE. MODELS ALL HAVE THE SAME IDEA...WITH NOTICEABLE SHORT-TERM TIMING DIFFERENCES. ALL MODELS STRUGGLED WITH THE S/WV APPROACHING NWRN IL ATTM. AVN SEEMS TO HANDLE THE PLACEMENT OF THE SFC LOW BEST...WITH THE ETA A BIT TOO AGGRESSIVE AND THE NGM A BIT TOO FAR NORTH. AVN HAS SFC LOW NEAR DEC AT 00Z...AND NEAR CINCINNATI AT 06Z. WL MAKE MINOR ADJUSTMENT TO PCPN POPS AND TIMING GIVEN THIS SCENARIO. H500 S/WV DEEPENING INTO GREAT LAKES REGION MAY KEEP CLOUD-COVER ARND...ESP NRN SECTIONS...DURING DAY FRI. OTHERWISE...CANADIAN SFC HIGH PRES BUILDS IN...ALLOWING DRYING AND CLEARING CONDITIONS...WITH DWPTS SETTLING BACK INTO THE 60S...AND BY LATER FRI INTO THE 50S. UPR RIDGE SLOWLY NUDGES EWRD...BUT PERSISTANT S/WVS RIDING OVR THE TOP WL KEEP THE RIDGE FM BUILDING TOO MUCH OVR MID-MISSISSIPPI VALLEY THRU FCST PERIOD. SAT STILL LOOKS DRY...BUT AM CONCERNED WITH SUN IN THE WRN CWA...AS NEW AVN SHOWS OVERRUNNING PATTERN SETTING UP BY EARLY IN THE DAY. ONLY SLOW PROGRESSING TO THE UPR AND SFC PATTERNS ACRS THE CONUS THRU MON SHLD KEEP TEMPS FAIRLY UNIFORM. CURRENT ZONES HAVE A GOOD HANDLE ON THIS. ...PRELIMINARY CCF FOR COORDINATION PURPOSES ONLY... SPI BU 065/080 057/080 060 81400 PIA EU 063/078 055/079 059 81400 DEC BU 065/080 056/080 058 81400 CMI EU 064/078 054/079 057 81400 MTO BU 068/081 057/081 060 81400 LWV BU 070/082 059/082 060 81400 .ILX...NONE. PLAHMER
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:26 PM CDT | Severe Thunderstorm Warning | ILX | Shelby | 64 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; radar from the NEXRAD Level II archive.