Alert archive / Illinois / Tornado Warnings in 2015

Tornado Warning 22, NWS Quad Cities, IA

July 16, 2015Warren County, Illinois

NWS Quad Cities, IA issued this tornado warning at Jul 16, 2015, 7:44 PM CDT for Warren County, Illinois. It was in force for 20 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: Jul 16, 2015, 7:44 PM CDT (00:44 UTC)
Expired: Jul 16, 2015, 8:04 PM CDT
In force: 20 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Warren County, IL

The radar

The Quad Cities radar (KDVN), 91 km from the middle of the area, began a volume at 00:44 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 16, 4:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.7 hours before the alert went out and 92 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: 883 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 796 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

958 
WFUS53 KDVN 170044
TORDVN
ILC187-170115-
/O.NEW.KDVN.TO.W.0022.150717T0044Z-150717T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
744 PM CDT THU JUL 16 2015

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  WARREN COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 815 PM CDT
    
* AT 743 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR ROSEVILLE...OR 7 MILES SOUTH OF
  MONMOUTH...MOVING EAST AT 35 MPH.

  HAZARD...TORNADO. 

  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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  EAST CENTRAL WARREN COUNTY...INCLUDING THE FOLLOWING LOCATIONS...
  LARCHLAND...BERWICK...CAMERON AND ORMONDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...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.

&&

LAT...LON 4075 9068 4084 9070 4094 9044 4077 9044
      4073 9045
TIME...MOT...LOC 0043Z 262DEG 30KT 4081 9061 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

GIBBS

1 follow-up statement

259 
WWUS53 KDVN 170104
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
804 PM CDT THU JUL 16 2015

ILC187-170113-
/O.CAN.KDVN.TO.W.0022.000000T0000Z-150717T0115Z/
WARREN IL-
804 PM CDT THU JUL 16 2015

...THE TORNADO WARNING FOR EAST CENTRAL WARREN COUNTY IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS AND
HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
WEST CENTRAL ILLINOIS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
THE QUAD CITIES.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
WARREN COUNTY UNTIL 830 PM CDT.

LAT...LON 4075 9068 4084 9070 4094 9044 4077 9044
      4073 9045
TIME...MOT...LOC 0100Z 262DEG 30KT 4073 9033 

$$

GIBBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:05 PM CDT	Tornado Warning Tornado observed	DVN	Warren	40 min
Jul 16, 7:42 PM CDT	Severe Thunderstorm Warning	DVN	McDonough, Warren	26 min
Jul 16, 7:49 PM CDT	Flash Flood Warning	DVN	Warren	4 hr
Jul 16, 8:05 PM CDT	Flash Flood Warning	DVN	Henry, Rock Island, Whiteside	3 hr
Jul 16, 8:06 PM CDT	Special Weather Statement	DVN	McDonough	24 min
Jul 17, 1:52 AM CDT	Special Weather Statement	DVN	Henderson, Mercer, Warren	38 min
Jul 17, 1:53 AM CDT	Special Weather Statement	DVN	Henderson, Mercer, Warren	37 min
Jul 17, 3:16 AM CDT	Heat Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	33 hr

Nearby

Tornado Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.