Alert archive / Illinois / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 40, NWS Lincoln, IL

May 11, 2005Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 11, 2005, 5:34 PM CDT for Sangamon County, Illinois. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2005, 5:34 PM CDT (22:34 UTC)
Expired: May 11, 2005, 6:31 PM CDT
In force: 57 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 55 km from the middle of the area, began a volume at 22:36 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.6 hours before the alert went out and 97 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: 1689 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1125 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 112236
SVRILX
ILC167-112330-
/O.NEW.KILX.SV.W.0040.050511T2234Z-050511T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
534 PM CDT WED MAY 11 2005

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEAST SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 630 PM CDT

* AT 530 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR CHATHAM...AND WAS MOVING EAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHATHAM
  BERRY
  
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE 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 3969 8967 3964 8966 3965 8950 3969 8944
      3977 8945

$$

MILLER

3 follow-up statements

000 
WWUS53 KILX 112257
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
555 PM CDT WED MAY 11 2005

ILC167-112330-
/O.CON.KILX.SV.W.0040.000000T0000Z-050511T2330Z/
SANGAMON-
555 PM CDT WED MAY 11 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 630 PM CDT FOR
SANGAMON COUNTY...

AT 551 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
THIS STORM WAS LOCATED 3 MILES SOUTHWEST OF ROCHESTER...MOVING 
NORTHEAST AT 15 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED 2 MILES 
WEST OF CHATHAM MOVING EAST NORTHEAST AT 15 MPH.

PEOPLE NEAR THESE LOCATIONS ARE STILL THREATENED...
  ROCHESTER.
  BERRY.
  CHATHAM.
  EXTREME SOUTHERN PART OF THE CITY OF SPRINGFIELD.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE 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 3971 8979 3964 8979 3966 8951 3970 8946
      3978 8941 3972 8964

$$

MILLER

000 
WWUS53 KILX 112320
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
620 PM CDT WED MAY 11 2005

ILC167-112330-
/O.CON.KILX.SV.W.0040.000000T0000Z-050511T2330Z/
SANGAMON-
620 PM CDT WED MAY 11 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 630 PM CDT FOR
SANGAMON COUNTY...

AT 617 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
THIS STORM WAS LOCATED NEAR BERRY...OR ABOUT 9 MILES SOUTHEAST OF
SPRINGFIELD...MOVING EAST AT 20 MPH. ANOTHER SEVERE THUNDERSTORM WAS
2 MILES NORTH OF CHATHAM...ALSO MOVING EAST AT 20 MPH.

PEOPLE NEAR THESE LOCATIONS ARE STILL THREATENED...
  BERRY.
  SOUTHERN PARTS OF THE CITY OF SPRINGFIELD.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE 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 3971 8979 3964 8979 3966 8951 3970 8946
      3978 8941 3972 8964

$$

MILLER

000 
WWUS53 KILX 112331
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
630 PM CDT WED MAY 11 2005

ILC167-112340-
/O.EXP.KILX.SV.W.0040.000000T0000Z-050511T2330Z/
SANGAMON-
630 PM CDT WED MAY 11 2005

...THE SEVERE THUNDERSTORM WARNING FOR SANGAMON COUNTY EXPIRED AT 
630 PM CDT...

AT 630 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THE THUNDERSTORM THAT HAD PROMPTED THE WARNING HAD MOVED OUT OF THE
AREA...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.
REMAIN ALERT TO THE POSSIBILITY OF MORE SEVERE WEATHER.

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 3971 8979 3964 8979 3966 8951 3970 8946
      3978 8941 3972 8964

$$

MILLER

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 May 11, 2:00 PM CDT, 3 hours 34 minutes earlier.

Area forecast discussion, May 11, 2:00 PM CDT, 3 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
2 PM CDT WED MAY 11 2005

.DISCUSSION...

WILL BE ISSUING ZONES AND GRIDS A BIT EARLY TODAY WITH ISSUANCE OF
SEVERE THUNDERSTORM WATCH 247.

SHORT TERM...TONIGHT THROUGH SATURDAY...
ABUNDANT MESOSCALE CONCERNS REGARDING POTENTIAL CONVECTION THIS
AFTERNOON AND EVENING. OUTFLOW BOUNDARY FROM LAST NIGHTS CONVECTION
IS NOW IN PLACE FROM NEAR DANVILLE TO TAYLORVILLE AND IS PRODUCING
LOCALLY POOLING DEWPOINTS INTO THE 70S. THE 18Z KILX SOUNDING STILL
SHOWS THE SHALLOW COLD POOL ASSOCIATED WITH THIS BOUNDARY...HOWEVER
WINDS HAVE NOW BECOME SOUTHEAST AT PIA AND GBG AND 18Z SURFACE OBS
INDICATE THAT THE COOLER AIR HAS VIRTUALLY MIXED OUT ALLOWING THE
MAIN BOUNDARY TO REORGANIZE ITSELF NEAR I-80.  IN ADDITION...A
REINFORCEMENT OF THE COOL AIR IS SPEEDING SOUTHWARD THROUGH NORTHERN
ILLINOIS AT THIS TIME AND SHOULD PUSH SOUTH THROUGH AFTERNOON AND
EVENING.

THE COMBINATION OF BOUNDARIES AND POOLING OF MOISTURE HAS ALREADY
PRODUCED MUCAPE VALUES >3000 J/KG SOUTHEAST OF THE ORIGINAL OUTFLOW
WITH LITTLE OR NO CAPE.  WOULD EXPECT SCATTERED DEVELOPMENT ALONG
THIS BOUNDARY THIS AFTERNOON. THIS EVENING...MCS NOW DEVELOPING OVER
NORTHWEST MISSOURI WILL LIKELY TRACK NORTHEAST AND THEN EAST
SOUTHEAST ALONG PLUNGING FRONTAL BOUNDARY.  WOULD EXPECT THAT MUCH
OF THE AREA SHOULD SEE STORMS AT SOME POINT OVERNIGHT GIVEN THE
BOUNDARIES...THE APPROACHING MCS...AND AN INCREASING LLJ.  ONLY
QUESTION IS LACK OF SIGNIFICANT DYNAMICS WITH THE BEST FORCING NORTH
AND WEST OF THE AREA.

SOMEWHAT OF A LULL IS LIKELY ON THURSDAY WITH ONLY SCATTERED
ACTIVITY LIKELY OVER THE CENTRAL AND NORTH.  OF COURSE THAT DEPENDS
ON THE BOUNDARY PLACEMENT IN THE WAKE OF TONIGHTS MCS.

NEXT LIKELY POPS CAN BE EXPECTED ON FRIDAY AS DYNAMICS OF MAIN LOBE
ASSOCIATED WITH UPPER LOW OVER NORTHERN PLAINS REACHES AREA WITH
ASSOCIATED FRONT. COOLER TEMPS ALOFT WILL ENHANCE INSTABILITY
BRINGING ANOTHER POTENTIAL ROUND OF SEVERE WEATHER.

PRECIP WILL LIKELY LINGER INTO SATURDAY UNTIL MAIN TROUGH PASSES
THROUGH.

LONG TERM...SATURDAY THROUGH WEDNESDAY...
NORTHWEST FLOW SHOULD KEEP FORECAST AREA COOL AND DRY INTO NEXT
WEEK.  NEXT SYSTEM APPROACHES THE AREA LATE TUESDAY INTO WEDNESDAY.

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
IL...NONE.

&&

BARKER

Hazardous weather outlook, May 11, 11:30 AM CDT, 6 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1130 AM CDT WED MAY 11 2005

ILZ027>031-036>038-040>057-061>063-066>068-071>073-121100-
CASS-CHAMPAIGN-CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-
DE WITT-DOUGLAS-EDGAR-EFFINGHAM-FULTON-JASPER-KNOX-LAWRENCE-LOGAN-
MACON-MARSHALL-MASON-MCLEAN-MENARD-MORGAN-MOULTRIE-PEORIA-PIATT-
RICHLAND-SANGAMON-SCHUYLER-SCOTT-SHELBY-STARK-TAZEWELL-VERMILION-
WOODFORD-
INCLUDING THE CITIES OF...BLOOMINGTON...CHAMPAIGN...DANVILLE...
DECATUR...EFFINGHAM...FLORA...GALESBURG...HAVANA...JACKSONVILLE...
LAWRENCEVILLE...LINCOLN...MATTOON...PEORIA...SHELBYVILLE...
SPRINGFIELD AND TAYLORVILLE
1130 AM CDT WED MAY 11 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND SOUTHEAST ILLINOIS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS CENTRAL AND
SOUTHEAST ILLINOIS THIS AFTERNOON AND INTO THIS EVENING. THE BEST
CHANCES FOR SEVERE STORMS WILL BE FROM PEORIA SOUTHWARD BETWEEN
3 AND 9 PM. LARGE HAIL IS THE MAIN SEVERE WEATHER THREAT. GUSTY
WINDS AND HEAVY RAIN WITH SOME PONDING OF WATER IN URBAN AREAS CAN
ALSO BE EXPECTED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A CONTINUED CHANCE OF SEVERE THUNDERSTORMS WILL BE POSSIBLE ON
THURSDAY NORTHWEST OF THE ILLINOIS RIVER. THERE IS A SLIGHT CHANCE
OF SEVERE THUNDERSTORMS ACROSS CENTRAL AND SOUTHEAST ILLINOIS FROM
THE ILLINOIS RIVER SOUTHEAST ON FRIDAY AND FRIDAY NIGHT AS A COLD
FRONT MOVES THROUGH ILLINOIS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED BETWEEN 3 AND 9 PM THIS AFTERNOON
AND EARLY EVENING.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC AND CLIMATE
INFORMATION...IS AVAILABLE ON THE WEB AT:

HTTP://WWW.WEATHER.GOV/LINCOLN. THIS ADDRESS IS ALL IN LOWER CASE.

HUETTL/SHIMON

In the hours before

Local storm report, May 11, 5:24 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
524 PM CDT WED MAY 11 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0522 PM     HAIL             MAROA                   40.04N 88.95W
05/11/2005  0.88 INCH        MACON              IL   LAW ENFORCEMENT

            OBSERVED BY LAW ENFORCEMENT...VIA MACON COUNTY EMERGENCY
            MANAGER.

&&

KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 2:57 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	52 min
May 11, 5:23 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon	25 min
May 11, 5:29 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Shelby	46 min
May 11, 5:33 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	59 min
May 11, 5:38 PM CDT	Severe Thunderstorm Warning	ILX	Douglas, Moultrie, Piatt	67 min
May 11, 6:05 PM CDT	Severe Thunderstorm Warning	ILX	Morgan	41 min
May 11, 6:13 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon	64 min
May 11, 6:20 PM CDT	Flash Flood Warning	ILX	Edgar	3 hr
May 11, 6:23 PM CDT	Flash Flood Warning	ILX	Christian, Macon	3 hr
May 11, 6:29 PM CDT	Flash Flood Warning	ILX	Moultrie	3 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2005 Every severe thunderstorm warning in 2005

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.