Alert archive / Illinois / Tornado Warnings in 2016

Tornado Warning 20, NWS Quad Cities, IA

July 17, 2016Scott County, Iowa; Rock Island County, Whiteside County, Illinois

NWS Quad Cities, IA issued this tornado warning at Jul 17, 2016, 6:36 AM CDT for Scott County, Iowa; Rock Island County, Whiteside County, Illinois. It was in force for 24 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 17, 2016, 6:36 AM CDT (11:36 UTC)
Expired: Jul 17, 2016, 7:00 AM CDT
In force: 24 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Scott County, IA, Rock Island County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 28 km from the middle of the area, began a volume at 11:38 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 11.6 hours before the alert went out and 22 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: 1263 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

290 
WFUS53 KDVN 171136
TORDVN
ILC161-195-IAC163-171200-
/O.NEW.KDVN.TO.W.0020.160717T1136Z-160717T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
636 AM CDT SUN JUL 17 2016

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN ROCK ISLAND COUNTY IN NORTHWESTERN ILLINOIS...
  CENTRAL WHITESIDE COUNTY IN NORTHWESTERN ILLINOIS...
  NORTHEASTERN SCOTT COUNTY IN EAST CENTRAL IOWA...

* UNTIL 700 AM CDT
    
* AT 636 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER PRINCETON...OR 11 MILES NORTHEAST OF
  BETTENDORF... MOVING EAST AT 65 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 DANGEROUS STORM WILL BE NEAR...
  CAMANCHE AROUND 640 AM CDT. 
  ALBANY AROUND 645 AM CDT. 
  ERIE AND GARDEN PLAIN AROUND 650 AM CDT. 
  MORRISON...PROPHETSTOWN AND LYNDON AROUND 655 AM CDT. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DENROCK...WHITESIDE COUNTY FAIRGROUNDS...MALVERN...FENTON...NEWTON
CORNERS...HAMILTON CORNERS...UNIONVILLE...PRINCETON WILDLIFE AREA...
PORTLAND CORNERS AND WHITE PIGEON.

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.

&&

LAT...LON 4163 9045 4174 9048 4175 9043 4174 9043
      4174 9041 4173 9041 4174 9038 4173 9036
      4174 9034 4173 9032 4177 9028 4180 9019
      4181 9018 4182 9018 4191 8984 4165 8979
TIME...MOT...LOC 1136Z 258DEG 58KT 4170 9036 

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

$$

GIBBS

3 follow-up statements

356 
WWUS53 KDVN 171138
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
638 AM CDT SUN JUL 17 2016

ILC161-195-IAC163-171200-
/O.CON.KDVN.TO.W.0020.000000T0000Z-160717T1200Z/
ROCK ISLAND IL-WHITESIDE IL-SCOTT IA-
638 AM CDT SUN JUL 17 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
NORTHEASTERN ROCK ISLAND...CENTRAL WHITESIDE AND NORTHEASTERN SCOTT
COUNTIES...
        
AT 637 AM CDT...A CONFIRMED TORNADO WAS LOCATED OVER CORDOVA...OR 10
MILES SOUTHWEST OF CLINTON...MOVING EAST AT 65 MPH.

HAZARD...DAMAGING TORNADO. 

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. 

THIS TORNADO WILL BE NEAR...
  ERIE AND GARDEN PLAIN AROUND 650 AM CDT. 
  MORRISON...PROPHETSTOWN AND LYNDON AROUND 655 AM CDT. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DENROCK...WHITESIDE COUNTY FAIRGROUNDS...MALVERN...FENTON...NEWTON
CORNERS...HAMILTON CORNERS...UNIONVILLE...PRINCETON WILDLIFE AREA...
PORTLAND CORNERS AND WHITE PIGEON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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.

&&

LAT...LON 4163 9045 4174 9048 4175 9043 4174 9043
      4174 9041 4173 9041 4174 9038 4173 9036
      4174 9034 4173 9032 4177 9028 4180 9019
      4181 9018 4182 9018 4191 8984 4165 8979
TIME...MOT...LOC 1137Z 258DEG 58KT 4171 9032 

TORNADO...OBSERVED
HAIL...<.75IN

$$

GIBBS

320 
WWUS53 KDVN 171145
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
645 AM CDT SUN JUL 17 2016

IAC163-171155-
/O.CAN.KDVN.TO.W.0020.000000T0000Z-160717T1200Z/
SCOTT IA-
645 AM CDT SUN JUL 17 2016

...THE TORNADO WARNING FOR NORTHEASTERN SCOTT COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE WARNED AREA THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4163 9034 4165 9034 4168 9033 4169 9031
      4173 9032 4177 9028 4180 9019 4181 9018
      4182 9018 4191 8984 4165 8979
TIME...MOT...LOC 1145Z 258DEG 58KT 4174 9014 

$$

ILC161-195-171200-
/O.CON.KDVN.TO.W.0020.000000T0000Z-160717T1200Z/
ROCK ISLAND IL-WHITESIDE IL-
645 AM CDT SUN JUL 17 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
NORTHEASTERN ROCK ISLAND AND CENTRAL WHITESIDE COUNTIES...
    
AT 645 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR GARDEN PLAIN...OR 8 MILES SOUTHEAST OF CLINTON...
MOVING EAST AT 65 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 DANGEROUS STORM WILL BE NEAR...
  MORRISON...PROPHETSTOWN AND LYNDON AROUND 655 AM CDT. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DENROCK...WHITESIDE COUNTY FAIRGROUNDS...MALVERN...NEWTON CORNERS...
FENTON...HAMILTON CORNERS...UNIONVILLE...PORTLAND CORNERS...WHITE
PIGEON AND ROUND GROVE.

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.

&&

LAT...LON 4163 9034 4165 9034 4168 9033 4169 9031
      4173 9032 4177 9028 4180 9019 4181 9018
      4182 9018 4191 8984 4165 8979
TIME...MOT...LOC 1145Z 258DEG 58KT 4174 9014 

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

$$

GIBBS

780 
WWUS53 KDVN 171155
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
655 AM CDT SUN JUL 17 2016

ILC161-195-171204-
/O.EXP.KDVN.TO.W.0020.000000T0000Z-160717T1200Z/
ROCK ISLAND IL-WHITESIDE IL-
655 AM CDT SUN JUL 17 2016

...THE TORNADO WARNING FOR NORTHEASTERN ROCK ISLAND AND CENTRAL
WHITESIDE COUNTIES WILL EXPIRE AT 700 AM CDT...
    
THE TORNADO THREAT HAS DIMINISHED AND THE TORNADO WARNING HAS BEEN
CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY AND
A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.
HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

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
FOR ROCK ISLAND AND WHITESIDE COUNTY 715 AM CDT!

LAT...LON 4163 9034 4165 9034 4168 9033 4169 9031
      4173 9032 4177 9028 4180 9019 4181 9018
      4182 9018 4191 8984 4165 8979
TIME...MOT...LOC 1148Z 258DEG 58KT 4174 9014 

$$

GIBBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:26 AM CDT	Flash Flood Watch	DVN	Buchanan, Delaware, Dubuque	6 hr
Jul 17, 4:37 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Linn	53 min
Jul 17, 5:10 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Dubuque	28 min
Jul 17, 5:31 AM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Iowa, Johnson, Jones, Linn and 2 more	44 min
Jul 17, 6:14 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Muscatine, Scott	61 min
Jul 17, 6:24 AM CDT	Severe Thunderstorm Warning	DVN	Jackson	49 min
Jul 17, 7:16 AM CDT	Special Weather Statement	DVN	Des Moines, Lee	74 min
Jul 17, 7:11 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam, Whiteside	64 min
Jul 17, 8:06 AM CDT	Severe Thunderstorm Warning	DVN	McDonough, Warren	39 min

Nearby

Tornado Warnings in Illinois, 2016 Tornado Warnings in Iowa, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.