Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 7, NWS Quad Cities, IA

May 6, 2012Bureau County, Illinois

NWS Quad Cities, IA issued this tornado warning at May 6, 2012, 2:04 PM CDT for Bureau County, Illinois. It was in force for 26 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
May 6, 2012, 2:04 PM CDT (19:04 UTC)
Expired
May 6, 2012, 2:30 PM CDT
In force
26 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon

County Bureau County, IL

The radar

The Quad Cities radar (KDVN), 97 km from the middle of the area, began a volume at 19:06 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
May 6, 2:05 PM CDTFUNNEL CLOUD7 W Princeton, ILFUNNEL CLOUD IS HALFWAY DOWN TO THE GROUND. NO DEBRIS IS VISIBLE.
May 6, 2:07 PM CDTHAIL 14 W Princeton, IL
May 6, 2:35 PM CDTHAIL 0.88Princeton, IL

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

The watch it was issued in

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

IssuedProductOfficeLasted
May 6, 1:42 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.1 hours before the alert went out and 90 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 2012-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2361 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.193958Sfc1 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
2361 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.6

Open this sounding in Storm Lab

The text

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

590 
WFUS53 KDVN 061904
TORDVN
ILC011-061930-
/O.NEW.KDVN.TO.W.0007.120506T1904Z-120506T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
204 PM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL BUREAU COUNTY IN NORTH CENTRAL ILLINOIS...

* UNTIL 230 PM CDT.

* AT 202 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR WYANET...OR 6 MILES NORTHWEST OF PRINCETON...MOVING
  SOUTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  WYANET AROUND 205 PM CDT...
  8 MILES SOUTHWEST OF KASBEER AROUND 210 PM CDT...
  PRINCETON AROUND 220 PM CDT...
  PRINCETON AND DOVER AROUND 225 PM CDT...
  COAL HOLLOW...MALDEN AND 8 MILES SOUTHWEST OF ZEARING AROUND 230 PM
  CDT...

THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 46 AND
63.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY
EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI.

&&

LAT...LON 4146 8929 4128 8942 4138 8968 4154 8956
TIME...MOT...LOC 1904Z 297DEG 16KT 4141 8957

$$
2 follow-up statements
029 
WWUS53 KDVN 061913
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
213 PM CDT SUN MAY 6 2012

ILC011-061930-
/O.CON.KDVN.TO.W.0007.000000T0000Z-120506T1930Z/
BUREAU IL-
213 PM CDT SUN MAY 6 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM CDT FOR CENTRAL
BUREAU COUNTY...

AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED APPROXIMATELY NEAR
WYANET...OR NEAR PRINCETON...MOVING SOUTHEAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  PRINCETON AROUND 225 PM CDT...
  COAL HOLLOW...DOVER AND MALDEN AROUND 230 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.

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

&&

LAT...LON 4146 8929 4128 8942 4138 8968 4154 8956
TIME...MOT...LOC 1913Z 297DEG 16KT 4137 8954

$$

MCCLURE
306 
WWUS53 KDVN 061929
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
229 PM CDT SUN MAY 6 2012

ILC011-061939-
/O.EXP.KDVN.TO.W.0007.000000T0000Z-120506T1930Z/
BUREAU IL-
229 PM CDT SUN MAY 6 2012

...THE TORNADO WARNING FOR CENTRAL BUREAU COUNTY WILL EXPIRE AT 230
PM CDT...

THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS
WEAKENED. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY
EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI.

LAT...LON 4146 8929 4128 8942 4138 8968 4154 8956
TIME...MOT...LOC 1929Z 297DEG 16KT 4134 8946

$$

MCCLURE

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 4:07 AM CDTFlash Flood WatchDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more16 hr
May 6, 1:37 PM CDTSevere Thunderstorm WarningDVNBureau38 min
May 6, 1:42 PM CDTSevere Thunderstorm WarningDVNBureau, Henry63 min
May 6, 2:31 PM CDTSevere Thunderstorm WarningDVNBureau, Putnam44 min
May 6, 3:14 PM CDTSevere Thunderstorm WarningDVNBureau, Putnam36 min

Nearby

Tornado Warnings in Illinois, 2012Every tornado warning in 2012Tornadoes in 2012

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.