Alert archive / Illinois / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 252, NWS Lincoln, IL

August 3, 2008Knox County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 3, 2008, 7:00 AM CDT for Knox County, Illinois. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 3, 2008, 7:00 AM CDT (12:00 UTC)
Expired
Aug 3, 2008, 7:45 AM CDT
In force
45 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon

County Knox County, IL

The radar

The Quad Cities radar (KDVN), 77 km from the middle of the area, began a volume at 12:02 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

TimeReportWhereRemark
Aug 3, 7:27 AM CDTHAIL 0.88Galesburg, ILPEA TO NICKEL SIZE HAIL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 0.0 hours before the alert went out and 76 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2008-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2008-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1136 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
291 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 031200
SVRILX
ILC095-031245-
/O.NEW.KILX.SV.W.0252.080803T1200Z-080803T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
700 AM CDT SUN AUG 3 2008

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KNOX COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 745 AM CDT.

* AT 700 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 4 MILES
  NORTH OF GALESBURG...AND WAS MOVING SOUTHEAST AT 22 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GALESBURG...
  WATAGA...
  ONEIDA...
  ALTONA...
  KNOXVILLE...
  VICTORIA...
  GILSON...
  MAQUON...

OTHER LOCATIONS IN THIS WARNING INCLUDE...RIO...WILLIAMSFIELD AND
YATES CITY.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING.
PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG
BUILDING...BUT STAY AWAY FROM WINDOWS.

REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL EMERGENCY 
MANAGER...OR THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE 
NATIONAL WEATHER SERVICE.

LAT...LON 4116 9000 4086 8999 4072 9000 4071 9022
      4091 9047 4098 9045 4108 9045 4116 9044
TIME...MOT...LOC 1200Z 313DEG 19KT 4099 9039

$$

BARKER
2 follow-up statements
000 
WWUS53 KILX 031217
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
717 AM CDT SUN AUG 3 2008

ILC095-031245-
/O.CON.KILX.SV.W.0252.000000T0000Z-080803T1245Z/
KNOX-
717 AM CDT SUN AUG 3 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 AM CDT
FOR KNOX COUNTY...

AT 714 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
KNOXVILLE...OR ABOUT 4 MILES EAST OF GALESBURG...MOVING SOUTHEAST AT
25 MPH.

PEOPLE NEAR THESE LOCATIONS ARE STILL THREATENED...
  DELONG...
  SNAKE DEN HOLLOW...
  GILSON...
  DAHINDA...
  MAQUON...
  WILLIAMSFIELD...
  YATES CITY...

IF YOU ARE CAUGHT OUTDOORS...MOVE TO A STRONG BUILDING AND STAY AWAY
FROM WINDOWS. DO NOT TAKE SHELTER UNDER TREES OR PICNIC SHELTERS.
FREQUENT LIGHTNING IS COMMON IN SEVERE THUNDERSTORMS.

LAT...LON 4116 9000 4086 8999 4072 9000 4071 9022
      4091 9047 4098 9045 4108 9045 4116 9044
TIME...MOT...LOC 1217Z 314DEG 22KT 4092 9029

$$

BARKER
000 
WWUS53 KILX 031246
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
746 AM CDT SUN AUG 3 2008

ILC095-031256-
/O.EXP.KILX.SV.W.0252.000000T0000Z-080803T1245Z/
KNOX-
746 AM CDT SUN AUG 3 2008

...THE SEVERE THUNDERSTORM WARNING FOR KNOX COUNTY EXPIRES AT 745 AM
CDT...

AT 744 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THE THUNDERSTORM THAT HAD PROMPTED THE WARNING HAD WEAKENED...THUS
THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4116 9000 4086 8999 4072 9000 4071 9022
      4091 9047 4098 9045 4108 9045 4116 9044
TIME...MOT...LOC 1217Z 314DEG 22KT 4092 9029

$$

BARKER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:39 AM CDTAreal Flood AdvisoryILXKnox3 hr
Aug 3, 2:33 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more48 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2008Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.