Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS Quad Cities, IA

May 6, 2012Bureau County, Henry County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at May 6, 2012, 1:42 PM CDT for Bureau County, Henry County, Illinois. It was in force for 63 min. 4 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, 1:42 PM CDT (18:42 UTC)
Expired: May 6, 2012, 2:45 PM CDT
In force: 63 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Bureau County, IL, Henry County, IL

The radar

The Quad Cities radar (KDVN), 70 km from the middle of the area, began a volume at 18:45 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	Remark
May 6, 1:52 PM CDT	TSTM WND GST 40	2 W Bishop Hill, IL	RELAYED FROM GALVA ESDA
May 6, 1:52 PM CDT	HAIL 0.75	2 W Bishop Hill, IL	DIME SIZE HAIL RELAYED FROM GALVA ESDA.
May 6, 1:56 PM CDT	HAIL 1	Bishop Hill, IL	HAIL SIZED INCREAED FROM DIME TO QUARTER SIZED
May 6, 2:23 PM CDT	HAIL 0.25	Kewanee, 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.

Issued	Product	Office	Lasted
May 6, 9:29 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 6, 1:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 6.7 hours before the alert went out and 66 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: 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.

772 
WUUS53 KDVN 061842
SVRDVN
ILC011-073-061945-
/O.NEW.KDVN.SV.W.0033.120506T1842Z-120506T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
142 PM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BUREAU COUNTY IN NORTH CENTRAL ILLINOIS...
  SOUTHEASTERN HENRY COUNTY IN NORTHWEST ILLINOIS...

* UNTIL 245 PM CDT.

* AT 140 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS AROUND 60
  MPH...AND PING PONG BALL SIZE HAIL.  THIS STORM WAS LOCATED
  APPROXIMATELY 6 MILES SOUTHEAST OF CAMBRIDGE...AND MOVING EAST AT
  25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GALVA...KEWANEE...SHEFFIELD AND BUDA.

THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 44 AND
46.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

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

THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM
FLOODING.

&&

LAT...LON 4123 8986 4115 8986 4115 8987 4115 9024
      4132 9024 4139 8966 4123 8965
TIME...MOT...LOC 1842Z 269DEG 21KT 4123 9012
WIND...HAIL 60MPH 1.50IN

$$

3 follow-up statements

072 
WWUS53 KDVN 061856
SVSDVN

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

ILC011-073-061945-
/O.CON.KDVN.SV.W.0033.000000T0000Z-120506T1945Z/
HENRY IL-BUREAU IL-
156 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR SOUTHWESTERN BUREAU AND SOUTHEASTERN HENRY COUNTIES...

AT 153 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
AROUND 60 MPH...AND PING PONG BALL SIZE HAIL.  THIS STORM WAS LOCATED
APPROXIMATELY NEAR BISHOP HILL...OR 8 MILES SOUTHEAST OF CAMBRIDGE...
MOVING EAST AT 25 MPH. ANOTHER SEVERE THUNDERSTORM WITH LARGE HAIL
AND DAMAGING WINDS WAS LOCATED 3 MILES EAST OF KEWANEE MOVING EAST
AT 25 MPH. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GALVA...GERMAN CORNER...KEWANEE MUNICIPAL AIRPORT...KEWANEE...JOHNSON
SAUK TRAIL...NEPONSET...SHEFFIELD AND BUDA.

THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 44 AND
46.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

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

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

&&

LAT...LON 4123 8986 4115 8986 4115 8987 4115 9024
      4132 9024 4139 8966 4123 8965
TIME...MOT...LOC 1855Z 269DEG 21KT 4123 9007
WIND...HAIL 60MPH 1.50IN

$$

MCCLURE

065 
WWUS53 KDVN 061915
SVSDVN

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

ILC011-073-061945-
/O.CON.KDVN.SV.W.0033.000000T0000Z-120506T1945Z/
HENRY IL-BUREAU IL-
215 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR SOUTHWESTERN BUREAU AND SOUTHEASTERN HENRY COUNTIES...

AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
AROUND 60 MPH...AND QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
APPROXIMATELY NEAR KEWANEE...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JOHNSON
SAUK TRAIL...NEPONSET...SHEFFIELD AND BUDA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

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

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

&&

LAT...LON 4123 8986 4115 8986 4115 9010 4134 9000
      4139 8966 4123 8965
TIME...MOT...LOC 1915Z 269DEG 21KT 4123 8991
WIND...HAIL 60MPH 1.00IN

$$

MCCLURE

027 
WWUS53 KDVN 061942
SVSDVN

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

ILC011-073-061951-
/O.EXP.KDVN.SV.W.0033.000000T0000Z-120506T1945Z/
HENRY IL-BUREAU IL-
242 PM CDT SUN MAY 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BUREAU AND
SOUTHEASTERN HENRY COUNTIES WILL EXPIRE AT 245 PM CDT...

THE THUNDERSTORM WITH A HISTORY OF PRODUCING SEVERE WEATHER WAS 
MOVING OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM 
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 4123 8986 4115 8986 4115 9010 4134 9000
      4139 8966 4123 8965
TIME...MOT...LOC 1941Z 269DEG 21KT 4123 8971

$$

MCCLURE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 4:07 AM CDT	Flash Flood Watch	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	16 hr
May 6, 1:37 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	38 min
May 6, 2:04 PM CDT	Tornado Warning	DVN	Bureau	26 min
May 6, 2:31 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	44 min
May 6, 3:14 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	36 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2012 Every severe thunderstorm warning 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.