Alert archive / Illinois / Tornado Warnings in 2016

Tornado Warning 21, NWS Quad Cities, IA

July 17, 2016Putnam County, Illinois

NWS Quad Cities, IA issued this tornado warning at Jul 17, 2016, 8:21 PM CDT for Putnam County, Illinois. It was in force for 24 min. 1 report 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: Jul 17, 2016, 8:21 PM CDT (01:21 UTC)
Expired: Jul 17, 2016, 8:45 PM CDT
In force: 24 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Putnam County, IL

The radar

The Chicago radar (KLOT), 107 km from the middle of the area, began a volume at 01:22 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
Jul 17, 8:24 PM CDT	TORNADO	1 Sse Florid, IL	BRIEF TOUCHDOWN. FUNNEL WENT UP AND DOWN.

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

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 116 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: 2451 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

As transmitted.

639 
WFUS53 KDVN 180121
TORDVN
ILC155-180145-
/O.NEW.KDVN.TO.W.0021.160718T0121Z-160718T0145Z/

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

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN PUTNAM COUNTY IN NORTH CENTRAL ILLINOIS...

* UNTIL 845 PM CDT
    
* AT 821 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR MCNABB...OR 8 MILES SOUTHEAST OF
  HENNEPIN...MOVING EAST AT 45 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
  SOUTHEASTERN PUTNAM COUNTY...INCLUDING THE FOLLOWING LOCATIONS:
  STANDARD AND MAGNOLIA.

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 4113 8928 4125 8928 4127 8917 4111 8917
TIME...MOT...LOC 0121Z 270DEG 41KT 4119 8921 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

WOLF

2 follow-up statements

783 
WWUS53 KDVN 180132
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
832 PM CDT SUN JUL 17 2016

ILC155-180145-
/O.CON.KDVN.TO.W.0021.000000T0000Z-160718T0145Z/
PUTNAM IL-
832 PM CDT SUN JUL 17 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
EASTERN PUTNAM COUNTY...
    
AT 830 PM CDT...A TORNADO WAS REPORTEDLY TOUCHING DOWN
INTERMITTENTLY TWO MILES EAST OF MCNABB...MOVING EAST AT 45 MPH.

HAZARD...DAMAGING TORNADO. 

SOURCE...WEATHER SPOTTERS 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. 

LOCATIONS IMPACTED INCLUDE...
MCNABB AND STANDARD. 

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 4114 8923 4124 8923 4127 8917 4112 8917
TIME...MOT...LOC 0130Z 270DEG 41KT 4119 8906 

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

$$

WOLF

116 
WWUS53 KDVN 180142
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
842 PM CDT SUN JUL 17 2016

ILC155-180152-
/O.EXP.KDVN.TO.W.0021.000000T0000Z-160718T0145Z/
PUTNAM IL-
842 PM CDT SUN JUL 17 2016

...THE TORNADO WARNING FOR SOUTHEASTERN PUTNAM COUNTY WILL EXPIRE AT
845 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4114 8923 4124 8923 4127 8917 4112 8917
TIME...MOT...LOC 0141Z 270DEG 41KT 4119 8906 

$$

WOLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 6:10 AM CDT	Special Weather Statement	DVN	Warren	65 min
Jul 18, 6:48 AM CDT	Special Weather Statement	DVN	McDonough	57 min
Jul 18, 3:37 PM CDT	Excessive Heat Watch	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	44 hr
Jul 18, 6:56 PM CDT	Special Weather Statement	DVN	Henry, Putnam	79 min

Nearby

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