Alert archive / Illinois / Tornado Warnings in 2015

Tornado Warning 7, NWS Quad Cities, IA

April 9, 2015Clinton County, Iowa; Carroll County, Whiteside County, Illinois

NWS Quad Cities, IA issued this tornado warning at Apr 9, 2015, 5:49 PM CDT for Clinton County, Iowa; Carroll County, Whiteside County, Illinois. It was in force for 26 min. 6 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: Apr 9, 2015, 5:49 PM CDT (22:49 UTC)
Expired: Apr 9, 2015, 6:15 PM CDT
In force: 26 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Observed
Damage threat: Considerable
Hail: 1.5 in

Counties Clinton County, IA, Carroll County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 48 km from the middle of the area, began a volume at 22:52 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
Apr 9, 5:50 PM CDT	TSTM WND DMG	Clinton, IA	TREE LIMBS DOWN. ESTIMATED WIND 50 MPH.
Apr 9, 5:54 PM CDT	TSTM WND DMG	2 Ene Clinton, IA	WIND ESTIMATED AT 50 MPH BROKE SMALL BRANCHES
Apr 9, 5:54 PM CDT	HAIL 0.88	2 Ene Clinton, IA
Apr 9, 5:55 PM CDT	TSTM WND DMG	Clinton, IA	30 FOOT PINE TREE ON HOUSE-TIME IS ESTIMATED
Apr 9, 5:55 PM CDT	TSTM WND DMG	Clinton, IA	REPORTS OF MANY TREES DOWN NEAR VALLEY OAKS
Apr 9, 5:55 PM CDT	TSTM WND GST 56	Clinton Municipal Airpo, IA

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
Apr 9, 12:58 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.8 hours before the alert went out and 43 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: 101 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

577 
WFUS53 KDVN 092249
TORDVN
IAC045-ILC015-195-092315-
/O.NEW.KDVN.TO.W.0007.150409T2249Z-150409T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
549 PM CDT THU APR 9 2015

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CLINTON COUNTY IN EAST CENTRAL IOWA...
  SOUTHWESTERN CARROLL COUNTY IN NORTHWEST ILLINOIS...
  NORTHWESTERN WHITESIDE COUNTY IN NORTHWEST ILLINOIS...

* UNTIL 615 PM CDT

* AT 546 PM CDT...A CONFIRMED LARGE AND EXTREMELY DANGEROUS TORNADO
  WAS LOCATED NEAR CAMANCHE...AND MOVING NORTHEAST AT 40 MPH.

  THIS IS A PARTICULARLY DANGEROUS SITUATION.

  HAZARD...DAMAGING TORNADO.

  SOURCE...RADAR CONFIRMED TORNADO.

  IMPACT...YOU ARE IN A LIFE THREATENING SITUATION. FLYING DEBRIS
           WILL BE DEADLY TO THOSE CAUGHT WITHOUT SHELTER. MOBILE
           HOMES WILL BE DESTROYED. CONSIDERABLE DAMAGE TO HOMES...
           BUSINESSES AND VEHICLES IS LIKELY AND COMPLETE DESTRUCTION
           POSSIBLE.

* THE TORNADO WILL BE NEAR...
  FULTON AND EAST CLINTON AROUND 555 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE LYONS...BULGERS HOLLOW AND
THOMSON.

OTHER LOCATIONS AFFECTED INCLUDE SOARING EAGLES NATURE CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS ON THE GROUND. TO PROTECT YOUR LIFE...TAKE COVER NOW. MOVE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

&&

LAT...LON 4203 9007 4187 8996 4178 9034 4191 9045
TIME...MOT...LOC 2249Z 225DEG 34KT 4185 9027

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.50IN

$$

MM/DC

2 follow-up statements

910 
WWUS53 KDVN 092257
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
557 PM CDT THU APR 9 2015

IAC045-ILC015-195-092315-
/O.CON.KDVN.TO.W.0007.000000T0000Z-150409T2315Z/
CLINTON IA-WHITESIDE IL-CARROLL IL-
557 PM CDT THU APR 9 2015

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN CARROLL...
NORTHWESTERN WHITESIDE AND EAST CENTRAL CLINTON COUNTIES UNTIL 615 PM
CDT...

AT 554 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR FULTON...AND
MOVING NORTHEAST AT 50 MPH.

HAZARD...DAMAGING TORNADO AND PING PONG BALL SIZE HAIL.

SOURCE...RADAR CONFIRMED TORNADO.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL CLINTON...
NORTHWESTERN WHITESIDE AND SOUTHWESTERN CARROLL COUNTIES...INCLUDING
THE FOLLOWING LOCATIONS...USTICK.

OTHER LOCATIONS AFFECTED INCLUDE SOARING EAGLES NATURE CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

&&

LAT...LON 4189 9027 4198 9004 4187 8996 4180 9024
TIME...MOT...LOC 2257Z 247DEG 42KT 4188 9014

TORNADO...OBSERVED
HAIL...1.50IN

$$

MM/DC

835 
WWUS53 KDVN 092302
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
602 PM CDT THU APR 9 2015

IAC045-092312-
/O.CAN.KDVN.TO.W.0007.000000T0000Z-150409T2315Z/
CLINTON IA-
602 PM CDT THU APR 9 2015

...THE TORNADO WARNING FOR EAST CENTRAL CLINTON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HASMOVED OUT OF THE WARNED AREA.

LAT...LON 4182 9015 4183 9015 4190 9016 4194 9015
      4198 9004 4187 8996
TIME...MOT...LOC 2302Z 247DEG 42KT 4190 9007

$$

ILC015-195-092315-
/O.CON.KDVN.TO.W.0007.000000T0000Z-150409T2315Z/
WHITESIDE IL-CARROLL IL-
602 PM CDT THU APR 9 2015

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN CARROLL AND
NORTHWESTERN WHITESIDE COUNTIES UNTIL 615 PM CDT...

AT 559 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR FULTON...AND MOVING NORTHEAST AT 50 MPH.

HAZARD...TORNADO AND PING PONG BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF NORTHWESTERN
WHITESIDE AND SOUTHWESTERN CARROLL COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

&&

LAT...LON 4182 9015 4183 9015 4190 9016 4194 9015
      4198 9004 4187 8996
TIME...MOT...LOC 2302Z 247DEG 42KT 4190 9007

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

MM/DC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 8:46 PM CDT	Special Weather Statement	DVN	Lee	44 min
Apr 9, 12:00 AM CDT	Special Weather Statement	DVN	Buchanan	30 min
Apr 9, 3:11 PM CDT	Special Weather Statement	DVN	Keokuk	34 min
Apr 9, 3:19 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	26 min
Apr 9, 3:39 PM CDT	Tornado Warning	DVN	Keokuk, Washington	36 min
Apr 9, 3:57 PM CDT	Special Weather Statement	DVN	Van Buren	48 min
Apr 9, 4:06 PM CDT	Special Weather Statement	DVN	Dubuque	9 min
Apr 9, 4:14 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Louisa, Muscatine, Washington	46 min
Apr 9, 4:19 PM CDT	Special Weather Statement	DVN	Linn	41 min
Apr 9, 4:27 PM CDT	Special Weather Statement	DVN	Henry, Lee	48 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee	43 min
Apr 9, 4:35 PM CDT	Flash Flood Warning	DVN	Linn	6 hr
Apr 9, 5:00 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	45 min
Apr 9, 5:06 PM CDT	Tornado Warning	DVN	Scott	24 min
Apr 9, 5:24 PM CDT	Tornado Warning	DVN	Clinton, Scott	36 min
Apr 9, 5:41 PM CDT	Special Weather Statement	DVN	Dubuque	64 min
Apr 9, 5:45 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	30 min
Apr 9, 6:39 PM CDT	Special Weather Statement	DVN	Des Moines, Henry, Iowa, Jefferson, Johnson, Keokuk and 6 more	2 hr
Apr 8, 11:13 PM CDT	Special Weather Statement	DVN	Putnam	32 min
Apr 9, 1:08 PM CDT	Special Weather Statement	DVN	Bureau	52 min
Apr 9, 2:57 PM CDT	Special Weather Statement	DVN	Whiteside	18 min
Apr 9, 4:51 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	39 min
Apr 9, 5:27 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	48 min
Apr 9, 6:10 PM CDT	Special Weather Statement	DVN	Mercer	35 min
Apr 9, 6:10 PM CDT	Tornado Warning	DVN	Carroll	20 min

Nearby

Tornado Warnings in Illinois, 2015 Tornado Warnings in Iowa, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.