Alert archive / Illinois / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Quad Cities, IA

February 28, 2017Bureau County, Putnam County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Feb 28, 2017, 9:19 PM CST for Bureau County, Putnam County, Illinois. It was in force for 41 min. 3 reports 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, 9:19 PM CST (03:19 UTC)
Expired: Feb 28, 2017, 10:00 PM CST
In force: 41 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bureau County, IL, Putnam County, IL

The radar

The Quad Cities radar (KDVN), 93 km from the middle of the area, began a volume at 03:20 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, 9:25 PM CST	TSTM WND DMG	4 Nne Buda, IL	SMALL TREE BRANCHES WERE BROKEN OFF ALONG A FARM OUTBUILDING BEING BLOWN OVER. ESTIMATED WIND SPEED AROUND 60 MPH. THE DAMGE WAS FROM 4 MILES NORTH OF BUDA TO 4 MILES NORTH NORTHEAST OF BUDE. OR NORTHWEST OF WYANET.
Feb 28, 9:40 PM CST	HAIL 1.25	3 Nw Tiskilwa, IL	DELAYED REPORT. TIME ESTIMATED BY RADAR.
Feb 28, 9:46 PM CST	TORNADO	2 W Cherry, IL	AN EF-1 TORNADO TOUCHED DOWN 2 MILES WEST OF CHERRY AND DAMAGED MAINLY TREES ALONG ITS 2.34 MILE LONG PATH. A FARM SHED WAS ALSO COMPLETELY DESTROYED. THE TORNADO LIFTED ON THE WEST SIDE OF CHERRY. THE ESTIMATED PEAK WIND SPEED WAS 94 MPH AND ITS PATH WIDTH WA

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 00:00Z, 3.3 hours before the alert went out and 87 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: 23 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

476 
WUUS53 KDVN 010319
SVRDVN
ILC011-155-010400-
/O.NEW.KDVN.SV.W.0021.170301T0319Z-170301T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
919 PM CST TUE FEB 28 2017

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Putnam County in north central Illinois...
  Bureau County in north central Illinois...

* Until 1000 PM CST

* At 918 PM CST, a severe thunderstorm was located over Buda, or 10
  miles west of Princeton, moving east at 65 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Princeton, Hennepin, Spring Valley, DePue, Granville, Ladd, Wyanet,
  Sheffield, Tiskilwa, Dalzell, Buda, Bureau Junction, McNabb,
  Putnam, Mark, Cherry, Neponset, Malden, Seatonville and Mineral.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 37 and 72.
 Interstate 180 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

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

LAT...LON 4116 8964 4123 8964 4123 8985 4142 8985
      4153 8917 4116 8916
TIME...MOT...LOC 0318Z 258DEG 58KT 4134 8967 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

RP KINNEY

4 follow-up statements

366 
WWUS53 KDVN 010324
SVSDVN

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

ILC011-155-010400-
/O.CON.KDVN.SV.W.0021.000000T0000Z-170301T0400Z/
Putnam IL-Bureau IL-
924 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR PUTNAM AND BUREAU COUNTIES...

At 923 PM CST, a severe thunderstorm was located over Wyanet, or near
Princeton, moving east at 65 mph.

HAZARD...70 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Granville, Ladd, Wyanet,
Sheffield, Tiskilwa, Dalzell, Buda, Bureau Junction, McNabb, Putnam,
Mark, Cherry, Neponset, Malden, Seatonville and Standard.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 41 and 72.
 Interstate 180 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

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

LAT...LON 4116 8964 4123 8964 4123 8980 4143 8976
      4153 8917 4116 8916
TIME...MOT...LOC 0323Z 257DEG 54KT 4136 8959 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

RP KINNEY

112 
WWUS53 KDVN 010333
SVSDVN

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

ILC011-155-010400-
/O.CON.KDVN.SV.W.0021.000000T0000Z-170301T0400Z/
Putnam IL-Bureau IL-
933 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR NORTHERN PUTNAM AND EASTERN BUREAU COUNTIES...

At 932 PM CST, a severe thunderstorm was located near Princeton,
moving east at 65 mph.

HAZARD...70 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Granville, Ladd, Wyanet,
Tiskilwa, Dalzell, Bureau Junction, Mark, Cherry, Malden,
Seatonville, Standard, Arlington, Dover, Hollowayville, Spring Valley
Airport and Coal Hollow.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 48 and 72.
 Interstate 180 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

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

LAT...LON 4124 8964 4145 8963 4153 8917 4120 8916
TIME...MOT...LOC 0332Z 257DEG 57KT 4139 8940 

TORNADO...POSSIBLE
HAIL...0.88IN
WIND...70MPH
 
$$

RP KINNEY

517 
WWUS53 KDVN 010338
SVSDVN

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

ILC011-155-010400-
/O.CON.KDVN.SV.W.0021.000000T0000Z-170301T0400Z/
Putnam IL-Bureau IL-
938 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR NORTHERN PUTNAM AND EASTERN BUREAU COUNTIES...

At 938 PM CST, a severe thunderstorm was located near La Moille, or 8
miles northeast of Princeton, moving east at 65 mph.

HAZARD...70 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Granville, Ladd, Tiskilwa,
Dalzell, Bureau Junction, Mark, Cherry, Malden, Seatonville,
Standard, Arlington, Dover, Hollowayville, Spring Valley Airport,
Coal Hollow and Zearing.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 55 and 72.
 Interstate 180 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

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

LAT...LON 4123 8952 4147 8951 4153 8917 4120 8916
TIME...MOT...LOC 0338Z 252DEG 55KT 4147 8937 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

RP KINNEY

983 
WWUS53 KDVN 010359
SVSDVN

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

ILC011-155-010409-
/O.EXP.KDVN.SV.W.0021.000000T0000Z-170301T0400Z/
Putnam IL-Bureau IL-
959 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN PUTNAM AND EASTERN
BUREAU COUNTIES WILL EXPIRE AT 1000 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

LAT...LON 4123 8952 4147 8951 4153 8917 4120 8916
TIME...MOT...LOC 0359Z 258DEG 58KT 4154 8894 

$$

RP KINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 6:01 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	29 min
Feb 28, 8:18 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Henry	28 min
Feb 28, 8:18 PM CST	Severe Thunderstorm Warning	DVN	Bureau	27 min
Feb 28, 8:22 PM CST	Severe Thunderstorm Warning	DVN	Mercer, Rock Island	23 min
Feb 28, 8:32 PM CST	Severe Thunderstorm Warning	DVN	Henry, Mercer, Rock Island	30 min
Feb 28, 9:00 PM CST	Special Weather Statement	DVN	Bureau, Henry, Putnam	45 min
Feb 28, 9:20 PM CST	Tornado Warning	DVN	Bureau, Putnam	40 min
Feb 28, 9:34 PM CST	River Flood Warning	DVN	Hancock	61 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2017 Every severe thunderstorm warning 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.