Alert archive / Iowa / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 127, NWS Quad Cities, IA

June 28, 20174 counties in Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 28, 2017, 7:28 PM CDT for 4 counties in Iowa. It was in force for 38 min. 2 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, 7:28 PM CDT (00:28 UTC)
Expired: Jun 28, 2017, 8:06 PM CDT
In force: 38 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Cedar County, IA, Clinton County, IA, Jackson County, IA, Jones County, IA

The radar

The Quad Cities radar (KDVN), 57 km from the middle of the area, began a volume at 00:28 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, 8:00 PM CDT	TSTM WND DMG	Oxford Junction, IA	TENT AND INSULATION BLOWN INTO TREES AND POWERLINE DOWN. TIME ESTIMATED. SOUTHWEST SIDE OF TOWN.
Jun 28, 8:00 PM CDT	TORNADO	Oxford Junction, IA	APPROXIMATELY A HALF MILE SSW OF OXFORD JUNCTION.

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 00:00Z, 0.5 hours before the alert went out and 60 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: 1521 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 334 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 15.1

Open this sounding in Storm Lab

The text

As transmitted.

600 
WUUS53 KDVN 290028
SVRDVN
IAC031-045-097-105-290115-
/O.NEW.KDVN.SV.W.0127.170629T0028Z-170629T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA
Issued by National Weather Service Des Moines IA
728 PM CDT WED JUN 28 2017

The National Weather Service in Quad Cities  has issued a

* Severe Thunderstorm Warning for...
  Southwestern Jackson County in east central Iowa...
  Northeastern Cedar County in east central Iowa...
  Southern Jones County in east central Iowa...
  Northwestern Clinton County in east central Iowa...

* Until 815 PM CDT.

* At 728 PM CDT, a severe thunderstorm was located over Stanwood,
  moving northeast at 35 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

* Locations impacted include...
  Mechanicsville, Stanwood, Lowden, Olin, Wyoming, Oxford Junction,
  Lost Nation, Onslow, Monmouth, Toronto, Morley, Nashville, Canton,
  Clarence, Baldwin, Emeline, Maquoketa Caves State Park, Buckhorn,
  Elwood and Massillon Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

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

LAT...LON 4222 9085 4192 9061 4181 9122 4198 9132
TIME...MOT...LOC 0028Z 247DEG 30KT 4193 9118 

HAIL...1.50IN
WIND...60MPH
 
$$

RP Kinney

3 follow-up statements

549 
WWUS53 KDVN 290036
SVSDVN

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

IAC031-045-097-105-290115-
/O.CON.KDVN.SV.W.0127.000000T0000Z-170629T0115Z/
Jackson IA-Cedar IA-Jones IA-Clinton IA-
736 PM CDT WED JUN 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHWESTERN JACKSON...NORTHEASTERN CEDAR...SOUTHEASTERN JONES
AND NORTHWESTERN CLINTON COUNTIES...

At 736 PM CDT, a severe thunderstorm was located near Olin, or near
Stanwood, moving northeast at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Stanwood, Lowden, Olin, Wyoming, Oxford Junction, Lost Nation,
Onslow, Monmouth, Toronto, Morley, Nashville, Canton, Clarence,
Baldwin, Emeline, Massillon Park, Oxford Mills, Eden Valley Refuge,
Maquoketa Caves State Park and Hale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

&&

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

LAT...LON 4222 9085 4192 9061 4181 9119 4200 9128
TIME...MOT...LOC 0036Z 246DEG 31KT 4196 9109 

HAIL...1.75IN
WIND...60MPH
 
$$

RP Kinney

843 
WWUS53 KDVN 290055
SVSDVN

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

IAC031-045-097-105-290115-
/O.CON.KDVN.SV.W.0127.000000T0000Z-170629T0115Z/
Jackson IA-Cedar IA-Jones IA-Clinton IA-
755 PM CDT WED JUN 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHWESTERN JACKSON...NORTHEASTERN CEDAR...SOUTHEASTERN JONES
AND NORTHWESTERN CLINTON COUNTIES...

At 755 PM CDT, a severe thunderstorm was located near Monmouth, or 12
miles west of Maquoketa, moving northeast at 35 mph.

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

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Stanwood, Lowden, Olin, Wyoming, Oxford Junction, Lost Nation,
Onslow, Monmouth, Toronto, Morley, Nashville, Canton, Clarence,
Baldwin, Emeline, Massillon Park, Oxford Mills, Eden Valley Refuge,
Maquoketa Caves State Park and Hale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

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

LAT...LON 4222 9085 4192 9061 4181 9119 4200 9128
TIME...MOT...LOC 0055Z 245DEG 29KT 4203 9091 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

RP Kinney/Uttech

140 
WWUS53 KDVN 290106
SVSDVN

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

IAC031-045-097-105-290114-
/O.CAN.KDVN.SV.W.0127.000000T0000Z-170629T0115Z/
Jackson IA-Cedar IA-Jones IA-Clinton IA-
806 PM CDT WED JUN 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JACKSON...
NORTHEASTERN CEDAR...SOUTHEASTERN JONES AND NORTHWESTERN CLINTON
COUNTIES IS CANCELLED...
        
The severe thunderstorm warning has been replaced by a tornado 
warning for parts of Jones, Clinton, and Jackson counties until 830 
pm. A trained spotter reported a brief tornado near Oxford Junction 
around 8 pm.

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

LAT...LON 4222 9085 4192 9061 4181 9119 4200 9128
TIME...MOT...LOC 0058Z 247DEG 30KT 4206 9081 

$$

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, 7:02 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Linn	43 min
Jun 28, 7:24 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson	51 min
Jun 28, 7:24 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	DVN	Dubuque, Jackson, Jones	51 min
Jun 28, 7:47 PM CDT	Tornado Warning	DVN	Clinton, Jackson, Jones	43 min
Jun 28, 8:01 PM CDT	Severe Thunderstorm Warning	DVN	Jones, Linn	23 min
Jun 28, 8:24 PM CDT	Tornado Warning Tornado observed	DVN	Jackson	51 min
Jun 28, 9:12 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Linn	48 min
Jun 28, 9:18 PM CDT	River Flood Warning	DVN	Clinton, Scott	4 days
Jun 28, 10:03 PM CDT	Severe Thunderstorm Warning	DVN	Lee	42 min
Jun 29, 4:54 PM CDT	Special Weather Statement	DVN	Buchanan	36 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.