Alert archive / Iowa / Tornado Warnings in 2018

Tornado Warning 34, NWS Quad Cities, IA

September 25, 2018Cedar County, Jones County, Iowa

NWS Quad Cities, IA issued this tornado warning at Sep 25, 2018, 1:51 PM CDT for Cedar County, Jones County, Iowa. It was in force for 24 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: Sep 25, 2018, 1:51 PM CDT (18:51 UTC)
Expired: Sep 25, 2018, 2:15 PM CDT
In force: 24 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cedar County, IA, Jones County, IA

The radar

The Quad Cities radar (KDVN), 51 km from the middle of the area, began a volume at 18:53 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
Sep 25, 1:53 PM CDT	TORNADO	1 Ssw Mechanicsville, IA	BRIEF TORNADO SOUTH OF TOWN. LOFTED 2 GRAIN BINS AND CAUSED DAMAGE TO SOME CORN.

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
Sep 25, 1:36 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 6.9 hours before the alert went out and 56 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: 47 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

316 
WFUS53 KDVN 251851
TORDVN
IAC031-105-251945-
/O.NEW.KDVN.TO.W.0034.180925T1851Z-180925T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
151 PM CDT TUE SEP 25 2018

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northern Cedar County in east central Iowa...
  Southeastern Jones County in east central Iowa...

* Until 245 PM CDT.
    
* At 151 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Mechanicsville, moving east at 50 mph.

  HAZARD...Tornado.

  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...
  Stanwood around 200 PM CDT.
  Lowden and Oxford Junction around 210 PM CDT.

Other locations impacted by this tornadic thunderstorm include Oxford
Mills, Massillon Park 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!

&&

LAT...LON 4180 9090 4182 9137 4195 9136 4201 9090
TIME...MOT...LOC 1851Z 257DEG 43KT 4190 9127 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

McClure

3 follow-up statements

426 
WWUS53 KDVN 251856
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
156 PM CDT TUE SEP 25 2018

IAC031-105-251945-
/O.CON.KDVN.TO.W.0034.000000T0000Z-180925T1945Z/
Cedar IA-Jones IA-
156 PM CDT TUE SEP 25 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR NORTHERN
CEDAR AND SOUTHEASTERN JONES COUNTIES...
    
At 155 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Stanwood, moving east at 50 mph.

HAZARD...Tornado.

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 and Oxford Junction around 210 PM CDT.

Other locations impacted by this tornadic thunderstorm include Oxford
Mills, Massillon Park 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!

&&

LAT...LON 4180 9090 4182 9129 4196 9127 4201 9090
TIME...MOT...LOC 1855Z 257DEG 43KT 4191 9119 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

McClure

210 
WWUS53 KDVN 251905
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
205 PM CDT TUE SEP 25 2018

IAC031-105-251945-
/O.CON.KDVN.TO.W.0034.000000T0000Z-180925T1945Z/
Cedar IA-Jones IA-
205 PM CDT TUE SEP 25 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR
NORTHEASTERN CEDAR AND SOUTHEASTERN JONES COUNTIES...
    
At 204 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Stanwood, moving east at 50 mph.

HAZARD...Tornado.

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 210 PM CDT.
  Oxford Junction around 215 PM CDT.

Other locations impacted by this tornadic thunderstorm include Oxford
Mills, Massillon Park 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!

&&

LAT...LON 4180 9090 4182 9118 4197 9117 4201 9090
TIME...MOT...LOC 1904Z 256DEG 42KT 4193 9106 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

McClure

062 
WWUS53 KDVN 251915 RRA
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
215 PM CDT TUE SEP 25 2018

IAC031-105-251925-
/O.CAN.KDVN.TO.W.0034.000000T0000Z-180925T1945Z/
Cedar IA-Jones IA-
215 PM CDT TUE SEP 25 2018

...THE TORNADO WARNING FOR NORTHEASTERN CEDAR AND SOUTHEASTERN JONES
COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Iowa.

LAT...LON 4180 9090 4182 9118 4197 9117 4201 9090
TIME...MOT...LOC 1914Z 257DEG 43KT 4196 9088 

$$

McClure

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 12:48 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson, Linn	42 min
Sep 25, 1:17 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Washington	43 min
Sep 25, 1:19 PM CDT	Tornado Warning	DVN	Henry, Louisa, Washington	41 min
Sep 25, 1:28 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Jackson, Johnson, Jones, Linn and 1 more	62 min
Sep 25, 1:28 PM CDT	Tornado Warning	DVN	Jones, Linn	47 min
Sep 25, 1:49 PM CDT	Tornado Warning	DVN	Louisa, Muscatine	41 min
Sep 25, 2:12 PM CDT	Tornado Warning	DVN	Henry, Louisa, Washington	27 min
Sep 25, 2:27 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	63 min

Nearby

Tornado Warnings in Iowa, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.