Alert archive / Illinois / Tornado Warnings in 2017

Tornado Warning 5, NWS Quad Cities, IA

February 28, 2017Putnam County, Illinois

NWS Quad Cities, IA issued this tornado warning at Feb 28, 2017, 4:47 PM CST for Putnam County, Illinois. It was in force for 8 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: Feb 28, 2017, 4:47 PM CST (22:47 UTC)
Expired: Feb 28, 2017, 4:55 PM CST
In force: 8 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Putnam County, IL

What was reported inside it

Time	Report	Where	Remark
Feb 28, 4:50 PM CST	TSTM WND DMG	5 Sw Peru, IL	LARGE TREE BRANCH DOWN. ESTIMATED WIND SPEED OF 60 MPH. CORRECTED TIME.

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
Feb 28, 2:57 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.8 hours before the alert went out and 112 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: 30 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

000 
WFUS53 KDVN 282247
TORDVN
ILC155-282315-
/O.NEW.KDVN.TO.W.0005.170228T2247Z-170228T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
447 PM CST TUE FEB 28 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northeastern Putnam County in north central Illinois...

* Until 515 PM CST
    
* At 447 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Granville, or near Hennepin, moving east at 30
  mph.

  HAZARD...Tornado and quarter 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 tornadic thunderstorm will remain over mainly rural areas of
  northeastern Putnam County, including the following locations:
  Mark, Florid and Standard.

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 4120 8931 4130 8934 4132 8923 4131 8923
      4131 8917 4130 8916 4121 8916
TIME...MOT...LOC 2247Z 265DEG 28KT 4126 8923 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

UTTECH

1 follow-up statement

245 
WWUS53 KDVN 282255
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
455 PM CST TUE FEB 28 2017

ILC155-282304-
/O.CAN.KDVN.TO.W.0005.000000T0000Z-170228T2315Z/
Putnam IL-
455 PM CST TUE FEB 28 2017

...THE TORNADO WARNING FOR NORTHEASTERN PUTNAM COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.  However small hail and
gusty winds are still possible with this thunderstorm.

A tornado watch remains in effect until 1000 PM CST for north central
Illinois.

LAT...LON 4120 8931 4130 8934 4132 8923 4131 8923
      4131 8917 4130 8916 4121 8916
TIME...MOT...LOC 2253Z 265DEG 28KT 4127 8915 

$$

UTTECH

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 10:39 AM CST	River Flood Warning	DVN	Rock Island	6 days
Feb 28, 10:39 AM CST	River Flood Warning	DVN	Mercer, Rock Island	7 days
Feb 28, 10:39 AM CST	River Flood Warning	DVN	Mercer	9 days
Feb 28, 10:39 AM CST	River Flood Warning	DVN	Henderson, Mercer	10 days
Feb 28, 10:52 AM CST	River Flood Watch	DVN	Carroll, Whiteside	8 days
Feb 28, 10:52 AM CST	River Flood Watch	DVN	Rock Island	4 days
Feb 28, 3:04 PM CST	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough	41 min
Feb 28, 3:28 PM CST	Tornado Warning	DVN	Rock Island	47 min
Feb 28, 3:44 PM CST	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	46 min
Feb 28, 3:54 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	51 min
Feb 28, 4:02 PM CST	Tornado Warning Tornado observed	DVN	Whiteside	22 min
Feb 28, 4:10 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Henry	35 min
Feb 28, 4:23 PM CST	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	67 min
Feb 28, 4:42 PM CST	Tornado Warning	DVN	Bureau, Putnam	14 min
Feb 28, 4:46 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	44 min
Feb 28, 4:46 PM CST	Tornado Warning	DVN	Whiteside	15 min

Nearby

Tornado Warnings in Illinois, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.