Alert archive / Illinois / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 563

July 10, 200016 counties in Illinois; Clinton County, Jackson County, Iowa; 14 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2000, 2:30 AM CDT for 16 counties in Illinois; Clinton County, Jackson County, Iowa; 14 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 10, 2000, 2:30 AM CDT (07:30 UTC)
Expired: Jul 10, 2000, 8:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 32 counties

Clinton County, IA, Jackson County, IA, Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Walworth County, WI, Waukesha County, WI

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 10, 2:51 AM CDT	Severe Thunderstorm Warning	MKX	Dane, Green	54 min
Jul 10, 3:15 AM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	20 min
Jul 10, 3:33 AM CDT	Severe Thunderstorm Warning	LOT	Winnebago	57 min
Jul 10, 3:34 AM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess, Stephenson	41 min
Jul 10, 3:40 AM CDT	Severe Thunderstorm Warning	MKX	Rock	60 min
Jul 10, 3:43 AM CDT	Severe Thunderstorm Warning	MKX	Green	22 min
Jul 10, 3:46 AM CDT	Severe Thunderstorm Warning	MKX	Dane	44 min
Jul 10, 4:33 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	57 min
Jul 10, 4:55 AM CDT	Flash Flood Warning	LOT	Grundy, Kendall, Will	3 hr
Jul 10, 5:54 AM CDT	Flash Flood Warning	MKX	Sauk	3 hr
Jul 10, 7:00 AM CDT	Flash Flood Warning	LOT	DeKalb, Grundy, Kendall, Lee, Will	60 min

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.5 hours before the alert went out and 150 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: 2939 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1086 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 109 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.

283 
WWUS9 KMKC 100701
SEL3  

SEL3  
MKC WW 100652
ILZ000-WIZ000-LMZ000-101300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 563
STORM PREDICTION CENTER NORMAN OK
152 AM CDT MON JUL 10 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHERN ILLINOIS                           
   SOUTHERN WISCONSIN                          
   SOUTHWEST LAKE MICHIGAN                      

EFFECTIVE THIS MONDAY MORNING FROM 230 AM UNTIL 800 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES NORTH OF DUBUQUE IOWA TO 25
MILES NORTH OF MEIGS FIELD CHICAGO ILLINOIS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 561...WW 562...

DISCUSSION...WELL-DEFINED LARGE SCALE BOW ECHO OVER NERN IA IS
MOVING ESEWD 45-50 KT...AND SHOULD MOVE ACROSS THE MS RIVER
SHORTLY.  AIR MASS IMMEDIATELY SOUTH OF THE SYSTEM IS VERY MOIST
AND UNSTABLE WITH MUCAPE OF 3500-4500 J/KG.  VAD/PROFILER DATA SHOW
WNWLY MID LEVEL WINDS INCREASING OVER THIS AREA WITH 40-45 KT FLOW
AT 500 MB...WHICH WILL AID MAINTENANCE OF THE MCS.  POTENTIAL FOR
WIDESPREAD WIND DAMAGE WILL EXIST WITH THIS SYSTEM OVER THE NEXT
FEW HOURS.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 28040.


...WEISS

434,0904 431,0873 411,0873 414,0904

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 18 more	5 hr
Jul 9, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 21 more	6 hr

Nearby

Severe Thunderstorm Watches in Illinois, 2000 Severe Thunderstorm Watches in Wisconsin, 2000 Severe Thunderstorm Watches in Iowa, 2000 Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive.