Alert archive / Illinois / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 7, NWS Quad Cities, IA

March 11, 2006Warren County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 11, 2006, 4:10 PM CST for Warren County, Illinois. It was in force for 65 min. 3 reports 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: Mar 11, 2006, 4:10 PM CST (22:10 UTC)
Expired: Mar 11, 2006, 5:15 PM CST
In force: 65 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Warren County, IL

The radar

The Quad Cities radar (KDVN), 92 km from the middle of the area, began a volume at 22:11 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
Mar 11, 4:25 PM CST	HAIL 0.75	Swan Creek, IL
Mar 11, 4:27 PM CST	HAIL 0.5	Roseville, IL
Mar 11, 4:27 PM CST	HAIL 0.75	3 S Roseville, IL

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

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 11, 2:22 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.2 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1578 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 436 m²/s²
0-3 km storm-relative helicity: 432 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.

000 
WUUS53 KDVN 112211
SVRDVN
ILC187-112315-
/O.NEW.KDVN.SV.W.0007.060311T2210Z-060311T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
410 PM CST SAT MAR 11 2006

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WARREN COUNTY IN WEST CENTRAL ILLINOIS
  THIS INCLUDES THE CITY OF MONMOUTH

* UNTIL 515 PM CST

* AT 407 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED 13 MILES SOUTH OF
  ROSEVILLE...OR ABOUT NEAR MACOMB...AND MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTHEAST OF ROSEVILLE BY 425 PM CST

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY 
FROM WINDOWS.  THIS STORM HAS ALREADY PRODUCED HALF DOLLAR SIZE HAIL 
IN MCDONOUGH COUNTY...AND IT REMAINS A THREAT.

LAT...LON 4064 9079 4064 9046 4106 9045 4097 9079

$$

MAYES

3 follow-up statements

000 
WWUS53 KDVN 112231
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
431 PM CST SAT MAR 11 2006

ILC187-112315-
/O.CON.KDVN.SV.W.0007.000000T0000Z-060311T2315Z/
WARREN IL-
431 PM CST SAT MAR 11 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR WARREN COUNTY...

AT 429 PM CST...TRAINED SPOTTERS REPORTED A SEVERE THUNDERSTORM 
PRODUCING PENNY SIZE HAIL SOUTH OF ROSEVILLE.  THIS STORM WAS 
LOCATED NEAR GREENBUSH...OR ABOUT 14 MILES SOUTH OF 
MONMOUTH...MOVING NORTHEAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES SOUTHEAST OF ORMONDE BY 435 PM CST
  6 MILES SOUTHEAST OF PHELPS AND 8 MILES SOUTHEAST OF NEMO BY 440 PM
  CST
  SURREY AND 5 MILES SOUTHEAST OF CAMERON BY 445 PM CST
  7 MILES SOUTHEAST OF UTAH AND 8 MILES SOUTHEAST OF COLDBROOK BY 450
  PM CST

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CST SATURDAY EVENING
FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI.

LAT...LON 4064 9079 4064 9046 4101 9045 4084 9079

$$

MAYES

000 
WWUS53 KDVN 112256
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
457 PM CST SAT MAR 11 2006

ILC187-112315-
/O.CON.KDVN.SV.W.0007.000000T0000Z-060311T2315Z/
WARREN IL-
457 PM CST SAT MAR 11 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR NORTHEASTERN WARREN COUNTY...

AT 455 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. 
THIS STORM WAS LOCATED NEAR COLDBROOK...OR ABOUT 6 MILES WEST OF
GALESBURG...MOVING NORTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHANGHAI CITY BY 505 PM CST

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CST SATURDAY EVENING
FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI.

LAT...LON 4084 9060 4084 9045 4107 9045 4103 9061

$$

MAYES

000 
WWUS53 KDVN 112308
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
508 PM CST SAT MAR 11 2006

ILC187-112318-
/O.EXP.KDVN.SV.W.0007.000000T0000Z-060311T2315Z/
WARREN IL-
508 PM CST SAT MAR 11 2006

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WARREN COUNTY
EXPIRES AT 515 PM CST...

THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM
WARNING HAS BEEN ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CST SATURDAY EVENING
FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI.

LAT...LON 4084 9060 4084 9045 4107 9045 4103 9061

$$

MAYES

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 Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 11, 3:31 PM CST, 39 minutes earlier.

Area forecast discussion, Mar 11, 3:31 PM CST, 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
330 PM CST SAT MAR 10

Hazardous weather outlook, Mar 11, 12:16 PM CST, 3 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1216 PM CST SAT MAR 11 2006

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-121730-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
1216 PM CST SAT MAR 11 2006

...SLIGHT RISK OF SEVERE WEATHER TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.

.DAY ONE...THIS AFTERNOON AND TONIGHT

FLOW FROM THE GULF OF MEXICO HAS ALLOWED WARM AND MOIST AIR TO
WORK ITS WAY TOWARD THE MID-MISSISSIPPI RIVER VALLEY THIS MORNING.
THE WARM AND MOIST AIR SHOULD AID INSTABILITY THIS AFTERNOON...
ALLOWING THUNDERSTORMS TO DEVELOP IN THE AREA. THE PRIMARY THREAT
FOR SEVERE WEATHER EXISTS SOUTH OF HIGHWAY 92 IN IOWA... IN ALL OF
NORTHEASTERN MISSOURI... AND ALONG AND EAST OF THE MISSISSIPPI
RIVER. ENOUGH WIND SHEAR IS PRESENT TO ALLOW DEVELOPMENT OF
SUPERCELL THUNDERSTORMS THAT WILL EVOLVE INTO A LINE OF STORMS
LATER IN THE EVENING. THE MAIN THREAT FROM THESE THUNDERSTORMS
WILL BE LARGE HAIL... ALTHOUGH DAMAGING WIND GUSTS ARE POSSIBLE AS
THE STORMS EVOLVE INTO A LINE IN THE EVENING. AN ISOLATED TORNADO
CANNOT BE RULED OUT... ALTHOUGH THE GREATER THREAT FOR TORNADOES
EXISTS IN EAST CENTRAL MISSOURI INTO SOUTHERN ILLINOIS. BRIEF HEAVY
RAINS MAY ALSO ACCOMPANY THUNDERSTORMS TODAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ON SUNDAY... A MODERATE RISK OF SEVERE WEATHER EXISTS FOR THE AREA
SOUTH OF HIGHWAY 34 AND A SLIGHT RISK FOR SEVERE WEATHER EXISTS
FOR THE REST OF THE AREA. A STORM SYSTEM MOVING THROUGH THE AREA
ON SUNDAY AFTERNOON WILL AGAIN ALLOW SUPERCELL STORMS TO DEVELOP
IN THE AREA. WITH MORE MOISTURE TOMORROW THAN TODAY AS WELL AS
STRONGER WIND SHEAR... THESE STORMS WILL BE CAPABLE OF PRODUCING
LARGE HAIL... DAMAGING WINDS... AND ISOLATED TORNADOES. PLEASE
STAY TUNED TO KEEP ABREAST OF FORECAST UPDATES AS THIS SCENARIO
EVOLVES.

ON WEDNESDAY AND THURSDAY... A DISTURBANCE FROM THE PACIFIC WILL
BRING RAIN AND SNOW TO THE AREA. IT IS TOO EARLY TO ASSESS THE
POTENTIAL FOR RAIN AND SNOW AMOUNTS WITH THIS SYSTEM.

THE LOCALLY HEAVY RAINS POSSIBLE WITH STORMS THIS WEEK MAY CAUSE
LOCAL RIVERS TO EXPERIENCE MODERATE RISES. CURRENT RIVER LEVELS
ARE RUNNING NEAR TO BELOW NORMAL DUE TO THE ONGOING DROUGHT ACROSS
THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND EVENING AS WELL AS
TOMORROW. PLEASE REPORT ANY SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE OFFICE IN THE QUAD CITIES.

MAYES

In the hours before

Local storm report, Mar 11, 3:53 PM CST, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
353 PM CST SAT MAR 11 2006

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

0350 PM     HAIL             GOOD HOPE               40.56N 90.67W
03/11/2006  E0.50 INCH       MCDONOUGH          IL   TRAINED SPOTTER

&&

MIKEZ

Local storm report, Mar 11, 3:57 PM CST, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
357 PM CST SAT MAR 11 2006

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

0355 PM     HAIL             TENNESSEE               40.41N 90.84W
03/11/2006  E0.75 INCH       MCDONOUGH          IL   TRAINED SPOTTER

&&

MIKEZ

Local storm report, Mar 11, 3:58 PM CST, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
358 PM CST SAT MAR 11 2006

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

0355 PM     HAIL             TENNESSEE               40.41N 90.84W
03/11/2006  E1.25 INCH       MCDONOUGH          IL   TRAINED SPOTTER

&&

MIKEZ

Local storm report, Mar 11, 4:00 PM CST, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
400 PM CST SAT MAR 11 2006

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

0344 PM     HAIL             AUGUSTA                 40.23N 90.95W
03/11/2006  E0.75 INCH       HANCOCK            IL   TRAINED SPOTTER

0344 PM     HAIL             PLYMOUTH                40.29N 90.92W
03/11/2006  E0.75 INCH       HANCOCK            IL   TRAINED SPOTTER

&&

DANF

Local storm report, Mar 11, 4:09 PM CST, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
409 PM CST SAT MAR 11 2006

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

0357 PM     HAIL             MACOMB                  40.47N 90.68W
03/11/2006  E0.88 INCH       MCDONOUGH          IL   TRAINED SPOTTER

&&

MIKEZ

Local storm report, Mar 11, 4:10 PM CST, 0 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
410 PM CST SAT MAR 11 2006

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

0407 PM     HAIL             MACOMB                  40.47N 90.68W
03/11/2006  E0.88 INCH       MCDONOUGH          IL   TRAINED SPOTTER

&&

MIKEZ

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 11, 3:36 PM CST	Severe Thunderstorm Warning	DVN	Hancock, McDonough	54 min
Mar 11, 4:59 PM CST	Severe Thunderstorm Warning	DVN	McDonough	38 min
Mar 11, 5:07 PM CST	Severe Thunderstorm Warning	DVN	Henry	53 min
Mar 11, 5:34 PM CST	Severe Thunderstorm Warning	DVN	Warren	15 min
Mar 11, 5:47 PM CST	Severe Thunderstorm Warning	DVN	Whiteside	39 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2006 Every severe thunderstorm warning in 2006

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.