Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 34, NWS Quad Cities, IA

May 17, 2017Cedar County, Johnson County, Muscatine County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 17, 2017, 6:48 PM CDT for Cedar County, Johnson County, Muscatine County, Iowa. It was in force for 42 min. 5 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: May 17, 2017, 6:48 PM CDT (23:48 UTC)
Expired: May 17, 2017, 7:30 PM CDT
In force: 42 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

Counties Cedar County, IA, Johnson County, IA, Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 65 km from the middle of the area, began a volume at 23:48 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
May 17, 6:48 PM CDT	TSTM WND DMG	Lone Tree, IA	PARKED SEMI BLOWN OVER AND DAMAGE TO FARM OUTBUILDINGS. POWER POLES DOWN. STRAIGHT LINE WIND DAMAGE.
May 17, 6:48 PM CDT	HAIL 0.75	2 Sse Hills, IA	PEA SIZE AND LARGER
May 17, 6:49 PM CDT	TSTM WND DMG	Lone Tree, IA	BARN BLOWN DOWN IN LONE TREE ON 640TH AND SOO, REPORTED BY SHERIFFS DEPUTY TO EM. TIME ESTIMATED
May 17, 6:59 PM CDT	TSTM WND DMG	West Branch, IA	60 FOOT TREE THROUGH A GARAGE IN TOWN.
May 17, 7:18 PM CDT	HAIL 0.25	Wsw Clarence, IA	HAIL AND VERY STRONG WIND

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
May 17, 3:44 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.8 hours before the alert went out and 72 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: 103 J/kg
Mixed-layer CIN: -348 J/kg
Mixed-layer LCL: 1223 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

389 
WFUS53 KDVN 172348
TORDVN
IAC031-103-139-180030-
/O.NEW.KDVN.TO.W.0034.170517T2348Z-170518T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
648 PM CDT WED MAY 17 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Cedar County in east central Iowa...
  Southeastern Johnson County in east central Iowa...
  Northwestern Muscatine County in east central Iowa...

* Until 730 PM CDT
    
* At 647 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Lone Tree, or 12 miles southeast of Iowa City,
  moving northeast at 60 mph.

  HAZARD...Tornado and ping pong 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...
  West Branch, West Liberty and Atalissa around 700 PM CDT. 
  Rochester around 705 PM CDT. 
  Tipton around 715 PM CDT. 
  Bennett around 720 PM CDT. 
  Lowden around 725 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Springdale, Cedar Valley, Muscatine County Fairgrounds, Massillon
Park, Bennett Park, Hills Access, Oasis, Moscow, Sunbury and
Clarence.

This includes Interstate 80 in Iowa between mile markers 249 and 278.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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

&&

LAT...LON 4195 9106 4194 9090 4159 9090 4138 9137
      4142 9137 4142 9148 4147 9151 4148 9151
      4148 9150 4150 9151 4150 9152 4151 9153
      4151 9157 4156 9162
TIME...MOT...LOC 2347Z 225DEG 52KT 4150 9144 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Gibbs

3 follow-up statements

031 
WWUS53 KDVN 172355 RRA
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
655 PM CDT WED MAY 17 2017

IAC031-103-139-180030-
/O.CON.KDVN.TO.W.0034.000000T0000Z-170518T0030Z/
Cedar IA-Johnson IA-Muscatine IA-
655 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CEDAR...
SOUTHEASTERN JOHNSON AND NORTHWESTERN MUSCATINE COUNTIES...
    
At 655 PM CDT, a confirmed tornado was located near West Branch,
moving northeast at 60 mph.

HAZARD...Damaging tornado and ping pong ball size hail. 

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. 

This tornado will be near...
  Rochester around 705 PM CDT. 
  Tipton around 710 PM CDT. 
  Stanwood around 720 PM CDT. 
  Lowden around 725 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Springdale, Cedar Valley, Muscatine County Fairgrounds, Massillon
Park, Bennett Park, Hills Access, Oasis, Moscow, Sunbury and
Clarence.

This includes Interstate 80 in Iowa between mile markers 249 and 278.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4195 9106 4194 9090 4159 9090 4138 9137
      4142 9137 4142 9148 4147 9151 4148 9151
      4148 9150 4150 9151 4150 9152 4151 9153
      4151 9157 4156 9162
TIME...MOT...LOC 2355Z 221DEG 51KT 4160 9136 

TORNADO...OBSERVED
HAIL...1.50IN

$$

Gibbs

576 
WWUS53 KDVN 180006
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
706 PM CDT WED MAY 17 2017

IAC103-139-180016-
/O.CAN.KDVN.TO.W.0034.000000T0000Z-170518T0030Z/
Johnson IA-Muscatine IA-
706 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR SOUTHEASTERN JOHNSON AND NORTHWESTERN
MUSCATINE COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for east central
Iowa.

LAT...LON 4194 9090 4160 9090 4160 9137 4174 9137
      4195 9106
TIME...MOT...LOC 0006Z 224DEG 52KT 4169 9121 

$$

IAC031-180030-
/O.CON.KDVN.TO.W.0034.000000T0000Z-170518T0030Z/
Cedar IA-
706 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CEDAR
COUNTY...
    
At 706 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Rochester, or near Tipton, moving northeast at 60
mph.

HAZARD...Tornado and ping pong 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...
  Tipton around 710 PM CDT. 
  Bennett around 715 PM CDT. 
  Stanwood around 720 PM CDT. 
  Lowden around 725 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Springdale, Cedar Valley, Cedar Valley Park, Herbert Hoover National
Historic Site, Massillon Park, Tipton Matthews Airport, Bennett Park,
Cedar County Fairgrounds, Sunbury and Clarence.

This includes Interstate 80 in Iowa between mile markers 254 and 278.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4194 9090 4160 9090 4160 9137 4174 9137
      4195 9106
TIME...MOT...LOC 0006Z 224DEG 52KT 4169 9121 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Gibbs

939 
WWUS53 KDVN 180017
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
717 PM CDT WED MAY 17 2017

IAC031-180030-
/O.CON.KDVN.TO.W.0034.000000T0000Z-170518T0030Z/
Cedar IA-
717 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHEASTERN CEDAR COUNTY...
    
At 717 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bennett, or near Tipton, moving northeast at 55 mph.

HAZARD...Tornado and ping pong 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...
  Lowden around 725 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Bennett Park, Massillon Park, Tipton Matthews Airport and Clarence.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4168 9090 4170 9110 4184 9122 4195 9106
      4194 9090
TIME...MOT...LOC 0017Z 240DEG 47KT 4177 9103 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 1:23 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Jones and 3 more	37 min
May 17, 8:50 AM CDT	Special Weather Statement	DVN	Scott	25 min
May 17, 3:16 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Linn	43 min
May 17, 3:36 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jones, Linn	54 min
May 17, 3:38 PM CDT	Tornado Warning	DVN	Jefferson, Keokuk, Washington	52 min
May 17, 3:45 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee, Van Buren	30 min
May 17, 3:49 PM CDT	Tornado Warning	DVN	Henry, Jefferson, Van Buren, Washington	41 min
May 17, 3:55 PM CDT	Tornado Warning	DVN	Des Moines, Henry, Lee, Louisa, Van Buren	50 min
May 17, 4:23 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Washington	44 min
May 17, 4:40 PM CDT	Tornado Warning	DVN	Des Moines, Henry, Louisa, Muscatine	50 min
May 17, 5:03 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Keokuk	57 min
May 17, 5:24 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	30 min
May 17, 5:39 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Van Buren, Washington	66 min
May 17, 5:50 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Linn and 1 more	55 min
May 17, 5:54 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	51 min
May 17, 6:01 PM CDT	Tornado Warning	DVN	Henry, Jefferson, Lee, Van Buren	59 min
May 17, 6:19 PM CDT	Tornado Warning	DVN	Johnson, Louisa, Washington	41 min
May 17, 6:28 PM CDT	Flash Flood Warning	DVN	Johnson, Linn	3 hr
May 17, 6:31 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Cedar, Clinton, Delaware, Dubuque, Jackson and 5 more	59 min
May 17, 6:32 PM CDT	Tornado Warning Tornado observed	DVN	Delaware, Dubuque, Jones, Linn	43 min
May 17, 6:38 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Louisa, Muscatine, Washington	52 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.