Alert archive / Illinois / Tornado Warnings in 2017

Tornado Warning 3, NWS Quad Cities, IA

February 28, 2017Bureau County, Putnam County, Illinois

NWS Quad Cities, IA issued this tornado warning at Feb 28, 2017, 4:42 PM CST for Bureau County, Putnam County, Illinois. It was in force for 14 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, 4:42 PM CST (22:42 UTC)
Expired: Feb 28, 2017, 4:56 PM CST
In force: 14 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Bureau County, IL, Putnam County, IL

The radar

The Quad Cities radar (KDVN), 98 km from the middle of the area, began a volume at 22:45 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
Feb 28, 4:55 PM CST	HAIL 0.88	Tiskilwa, IL	SIZE OF NICKELS.

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, 10.7 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: 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.

310 
WFUS53 KDVN 282242
TORDVN
ILC011-155-282315-
/O.NEW.KDVN.TO.W.0003.170228T2242Z-170228T2315Z/

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

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  West central Putnam County in north central Illinois...
  South central Bureau County in north central Illinois...

* Until 515 PM CST
    
* At 442 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Bradford, or 13 miles east of Kewanee, moving east
  at 40 mph.

  HAZARD...Tornado and golf 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 be near...
  Tiskilwa around 455 PM CST. 
  Bureau Junction around 510 PM CST. 
  Hennepin around 515 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Putnam, Providence, Milo, Lake Thunderbird and Lone Tree Corners.

This includes Interstate 180 between mile markers 1 and 6.
 
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 4118 8935 4117 8964 4123 8964 4123 8969
      4128 8969 4130 8960 4131 8936 4128 8934
TIME...MOT...LOC 2242Z 265DEG 33KT 4121 8968 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

UTTECH

2 follow-up statements

210 
WWUS53 KDVN 282251
SVSDVN

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

ILC011-155-282315-
/O.CON.KDVN.TO.W.0003.000000T0000Z-170228T2315Z/
Putnam IL-Bureau IL-
451 PM CST TUE FEB 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CST FOR WEST
CENTRAL PUTNAM AND SOUTH CENTRAL BUREAU COUNTIES...
    
At 450 PM CST, a severe thunderstorm capable of producing a tornado
was located near Tiskilwa, or 9 miles southwest of Princeton, moving
east at 45 mph.

HAZARD...Tornado and half dollar 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 be near...
  Bureau Junction around 505 PM CST. 
  Hennepin around 510 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Putnam, Providence, Milo, Lake Thunderbird and Lone Tree Corners.

This includes Interstate 180 between mile markers 1 and 6.
 
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 4118 8935 4117 8964 4129 8964 4130 8960
      4131 8936 4128 8934
TIME...MOT...LOC 2250Z 257DEG 40KT 4125 8954 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

UTTECH

081 
WWUS53 KDVN 282256
SVSDVN

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

ILC011-155-282306-
/O.CAN.KDVN.TO.W.0003.000000T0000Z-170228T2315Z/
Putnam IL-Bureau IL-
456 PM CST TUE FEB 28 2017

...THE TORNADO WARNING FOR WEST CENTRAL PUTNAM AND SOUTH CENTRAL
BUREAU COUNTIES 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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.

LAT...LON 4118 8935 4117 8964 4129 8964 4130 8960
      4131 8936 4128 8934
TIME...MOT...LOC 2253Z 265DEG 33KT 4126 8946 

$$

Gibbs

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, 4:46 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	44 min
Feb 28, 4:46 PM CST	Tornado Warning	DVN	Whiteside	15 min
Feb 28, 4:47 PM CST	Tornado Warning	DVN	Putnam	8 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; radar from the NEXRAD Level II archive.