Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 40, NWS Quad Cities, IA

June 28, 2017Delaware County, Jones County, Linn County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 28, 2017, 6:36 PM CDT for Delaware County, Jones County, Linn County, Iowa. It was in force for 39 min. 8 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: Jun 28, 2017, 6:36 PM CDT (23:36 UTC)
Expired: Jun 28, 2017, 7:15 PM CDT
In force: 39 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Delaware County, IA, Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 92 km from the middle of the area, began a volume at 23:35 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
Jun 28, 6:45 PM CDT	TORNADO	1 Wsw Prairieburg, IA	LARGE TORNADO WITH DEBRIS.
Jun 28, 6:45 PM CDT	TORNADO	4 S Central City, IA	SPOTTER LI158 REPORTED DEBRIS LOFTING
Jun 28, 6:48 PM CDT	TSTM WND DMG	Prairieburg, IA	HOUSE DOWN FROM TORNADO, PERSON TRAPPED.
Jun 28, 6:50 PM CDT	TSTM WND DMG	Prairieburg, IA	HOUSES DAMAGED, GRAIN BINS DOWN, AND SEMIS BLOWN OVER FROM TORNADO.
Jun 28, 6:55 PM CDT	TSTM WND DMG	3 S Buck Creek, IA	STRUCTURAL DAMAGE, POSSIBLE TORNADO.
Jun 28, 7:07 PM CDT	TSTM WND DMG	4 W Monticello, IA	DAMAGE TO BARNS AND OTHER STRUCTURES, POSSIBLE TORNADO.
Jun 28, 7:16 PM CDT	TSTM WND DMG	4 N Monticello, IA	TWO DAMAGED HOUSES, POSSIBLE TORNADO.
Jun 28, 7:17 PM CDT	TSTM WND DMG	3 Ese Hopkinton, IA	POWER LINES DOWN.

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
Jun 28, 2:53 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 95 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: 134 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 1152 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted.

797 
WFUS53 KDVN 282336
TORDVN
IAC055-105-113-290015-
/O.NEW.KDVN.TO.W.0040.170628T2336Z-170629T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
636 PM CDT WED JUN 28 2017

The National Weather Service in Quad Cities  has issued a

* Tornado Warning for...
  Northwestern Jones County in east central Iowa...
  Southeastern Delaware County in northeastern Iowa...
  Northeastern Linn County in east central Iowa...

* Until 715 PM CDT.

* At 635 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Central City, or 14 miles west of Anamosa, moving
  east at 35 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...
  Waubeek around 640 PM CDT. 
  Prairieburg around 645 PM CDT. 
  Stone City around 650 PM CDT. 
  Anamosa around 655 PM CDT. 
  Monticello and Langworthy around 705 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Pinicon Ridge Park, Camp Courageous, Scotch Grove, Matsell Bridge
Natural Area, Jones County Fairgrounds, Pictured Rocks Wildlife Area,
Buffalo Creek Park, Howard H Cherry Scout Reservation, Monticello
Municipal Airport and Linn  County Fairgrounds.

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 4236 9114 4234 9113 4230 9113 4230 9111
      4213 9104 4209 9165 4225 9170
TIME...MOT...LOC 2335Z 260DEG 33KT 4219 9155 

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

$$

RP Kinney

4 follow-up statements

654 
WWUS53 KDVN 282342
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
642 PM CDT WED JUN 28 2017

IAC055-105-113-290015-
/O.CON.KDVN.TO.W.0040.000000T0000Z-170629T0015Z/
Jones IA-Delaware IA-Linn IA-
642 PM CDT WED JUN 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHWESTERN JONES...SOUTHEASTERN DELAWARE AND NORTHEASTERN LINN
COUNTIES...
    
At 642 PM CDT, a confirmed large and extremely dangerous tornado was
located over Waubeek, or 11 miles northwest of Anamosa, moving east
at 35 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado. 

SOURCE...Law enforcement confirmed tornado. 

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible. 

The tornado will be near...
  Prairieburg around 645 PM CDT. 
  Stone City around 650 PM CDT. 
  Anamosa around 655 PM CDT. 
  Monticello and Langworthy around 705 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Pinicon Ridge Park, Camp Courageous, Scotch Grove, Matsell Bridge
Natural Area, Jones County Fairgrounds, Pictured Rocks Wildlife Area,
Howard H Cherry Scout Reservation, Monticello Municipal Airport and
Linn  County Fairgrounds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, 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 4236 9114 4234 9113 4230 9113 4230 9111
      4213 9104 4210 9159 4226 9164
TIME...MOT...LOC 2342Z 259DEG 33KT 4220 9147 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.25IN

$$

RP Kinney

802 
WWUS53 KDVN 282348
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
648 PM CDT WED JUN 28 2017

IAC055-105-113-290015-
/O.CON.KDVN.TO.W.0040.000000T0000Z-170629T0015Z/
Jones IA-Delaware IA-Linn IA-
648 PM CDT WED JUN 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHWESTERN JONES...SOUTHEASTERN DELAWARE AND NORTHEASTERN LINN
COUNTIES...
    
At 647 PM CDT, a confirmed large and extremely dangerous tornado was
located in Prairiesburg, moving east at 45 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado. 

SOURCE...Law enforcement confirmed tornado. 

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible. 

This tornadic thunderstorm will remain over mainly rural areas of
northwestern Jones...southeastern Delaware and northeastern Linn
Counties, including the following locations: Camp Courageous, Scotch
Grove, Matsell Bridge Natural Area, Jones County Fairgrounds,
Pictured Rocks Wildlife Area, Howard H Cherry Scout Reservation and
Monticello Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, 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 4236 9114 4234 9113 4230 9113 4230 9111
      4213 9104 4211 9148 4228 9151
TIME...MOT...LOC 2347Z 257DEG 39KT 4225 9128 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.25IN

$$

RP Kinney

372 
WWUS53 KDVN 290003
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
703 PM CDT WED JUN 28 2017

IAC055-105-113-290015-
/O.CON.KDVN.TO.W.0040.000000T0000Z-170629T0015Z/
Jones IA-Delaware IA-Linn IA-
703 PM CDT WED JUN 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHWESTERN JONES...SOUTHEASTERN DELAWARE AND NORTHEASTERN LINN
COUNTIES...
    
At 702 PM CDT, a confirmed large and extremely dangerous tornado was
located near Hopkinton, or 12 miles north of Anamosa, moving
northeast at 25 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado. 

SOURCE...Law enforcement confirmed tornado. 

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible. 

Locations impacted include...
north of Monticello.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, 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.

A large and extremely dangerous tornado is on the ground. take
immediate tornado precautions. this is an emergency situation.

&&

LAT...LON 4236 9114 4234 9113 4230 9113 4230 9111
      4227 9111 4223 9135 4229 9139
TIME...MOT...LOC 0002Z 241DEG 20KT 4229 9132 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...1.25IN

$$

RP Kinney

040 
WWUS53 KDVN 290014
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
714 PM CDT WED JUN 28 2017

IAC055-105-113-290023-
/O.EXP.KDVN.TO.W.0040.000000T0000Z-170629T0015Z/
Jones IA-Delaware IA-Linn IA-
714 PM CDT WED JUN 28 2017

...THE TORNADO WARNING FOR NORTHWESTERN JONES...SOUTHEASTERN DELAWARE
AND NORTHEASTERN LINN COUNTIES WILL EXPIRE AT 715 PM CDT...
    
The Tornado Warning that was previously in effect has been replaced 
by a new tornado warning in effect until 745 pm. Please refer to 
that bulletin for the latest severe weather information.  However 
small hail and gusty winds are still possible with this thunderstorm.

A tornado watch remains in effect until 1000 PM CDT for northeastern
and east central Iowa.

Remember, a Tornado Warning still remains in effect for parts of 
Jones, Delaware, and Dubuque counties until 745 pm.

LAT...LON 4236 9114 4234 9113 4230 9113 4230 9111
      4227 9111 4223 9135 4229 9139
TIME...MOT...LOC 0013Z 264DEG 34KT 4227 9124 

$$

RP Kinney

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:08 AM CDT	River Flood Watch	DVN	Clinton, Scott	6 days
Jun 28, 6:24 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	66 min
Jun 28, 6:34 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Jones, Linn	25 min
Jun 28, 6:56 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	DVN	Delaware, Dubuque, Jones	49 min

Nearby

Tornado Warnings in Iowa, 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.