Alert archive / Iowa / Tornado Warnings in 2018

Tornado Warning 39, NWS Quad Cities, IA

October 9, 2018Dubuque County, Iowa

NWS Quad Cities, IA issued this tornado warning at Oct 9, 2018, 2:12 PM CDT for Dubuque County, Iowa. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 9, 2018, 2:12 PM CDT (19:12 UTC)
Expired: Oct 9, 2018, 3:00 PM CDT
In force: 48 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Dubuque County, IA

The radar

The Quad Cities radar (KDVN), 110 km from the middle of the area, began a volume at 19:14 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.2 hours before the alert went out and 111 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: 459 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

898 
WFUS53 KDVN 091912
TORDVN
IAC061-092000-
/O.NEW.KDVN.TO.W.0039.181009T1912Z-181009T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
212 PM CDT TUE OCT 9 2018

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Western Dubuque County in northeastern Iowa...

* Until 300 PM CDT.
    
* At 212 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Epworth, or 14 miles west of Dubuque, moving north
  at 30 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...
  Centralia around 220 PM CDT.
  Dubuque and Bankston around 225 PM CDT.
  Asbury around 230 PM CDT.
  Holy Cross, Rickardsville and Durango around 235 PM CDT.
  Sherrill around 240 PM CDT.
  Balltown around 245 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Waupeton, Lattnerville, Graf, Five Points, East Rickardsville,
Bankston Park, Mud Lake Park, Cottage Hill, Finley's Landing Park and
Camp Little Cloud.

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 4264 9073 4263 9070 4235 9085 4239 9107
      4265 9101 4265 9090 4268 9089
TIME...MOT...LOC 1912Z 195DEG 26KT 4244 9095 

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

$$

Gibbs

4 follow-up statements

837 
WWUS53 KDVN 091927
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
227 PM CDT TUE OCT 9 2018

IAC061-092000-
/O.CON.KDVN.TO.W.0039.000000T0000Z-181009T2000Z/
Dubuque IA-
227 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR NORTH
CENTRAL DUBUQUE COUNTY...
    
At 226 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bankston, or 11 miles west of Dubuque, moving north
at 30 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...
  Rickardsville and Durango around 235 PM CDT.
  Sherrill and Balltown around 240 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Waupeton, Graf, Five Points, East Rickardsville, Bankston Park,
Cottage Hill, Finley's Landing Park and Camp Little Cloud.

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 4264 9073 4263 9070 4249 9084 4251 9098
      4265 9096 4265 9090 4268 9089
TIME...MOT...LOC 1926Z 196DEG 26KT 4254 9091 

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

$$

Gibbs

790 
WWUS53 KDVN 091937
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
237 PM CDT TUE OCT 9 2018

IAC061-092000-
/O.CON.KDVN.TO.W.0039.000000T0000Z-181009T2000Z/
Dubuque IA-
237 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR NORTH
CENTRAL DUBUQUE COUNTY...
    
At 237 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Rickardsville, or 11 miles northwest of Dubuque,
moving north at 30 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...
  Balltown around 240 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Waupeton, East Rickardsville, Finley's Landing Park and Cottage Hill.

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 4264 9075 4255 9084 4259 9097 4260 9097
      4265 9094 4265 9090 4268 9089
TIME...MOT...LOC 1937Z 197DEG 25KT 4261 9087 

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

$$

Gibbs

789 
WWUS53 KDVN 091943
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
243 PM CDT TUE OCT 9 2018

IAC061-092000-
/O.CON.KDVN.TO.W.0039.000000T0000Z-181009T2000Z/
Dubuque IA-
243 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR NORTH
CENTRAL DUBUQUE COUNTY...
    
At 243 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Balltown, or 13 miles northwest of Dubuque, moving
north at 30 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 tornadic thunderstorm will remain over mainly rural areas of
north central Dubuque County, including the following locations...
Waupeton and Finley's Landing Park.

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 4264 9075 4259 9081 4262 9091 4268 9089
TIME...MOT...LOC 1943Z 195DEG 26KT 4266 9085 

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

$$

Gibbs

503 
WWUS53 KDVN 091950
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
250 PM CDT TUE OCT 9 2018

IAC061-092000-
/O.EXP.KDVN.TO.W.0039.000000T0000Z-181009T2000Z/
Dubuque IA-
250 PM CDT TUE OCT 9 2018

...THE TORNADO WARNING FOR NORTH CENTRAL DUBUQUE COUNTY WILL EXPIRE
AT 300 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

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

LAT...LON 4264 9075 4259 9081 4262 9091 4268 9089
TIME...MOT...LOC 1950Z 195DEG 26KT 4270 9084 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 8, 7:45 PM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Linn	90 min
Oct 8, 8:20 PM CDT	Tornado Warning	DVN	Keokuk	29 min
Oct 8, 9:23 PM CDT	Special Weather Statement	DVN	Buchanan, Delaware	82 min
Oct 8, 10:29 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa	46 min
Oct 9, 2:27 AM CDT	Special Weather Statement	DVN	Benton, Buchanan	63 min
Oct 9, 3:42 AM CDT	Flash Flood Watch	DVN	Clinton, Des Moines, Henry, Jackson, Lee, Louisa and 3 more	33 hr
Oct 9, 11:23 AM CDT	River Flood Warning	DVN	Buchanan, Linn	5 days
Oct 9, 11:26 AM CDT	River Flood Warning	DVN	Delaware, Jones	3 days
Oct 9, 12:45 PM CDT	River Flood Warning	DVN	Dubuque, Jackson	6 days
Oct 9, 1:31 PM CDT	River Flood Warning	DVN	Dubuque	16 days
Oct 9, 3:06 PM CDT	Tornado Warning	DVN	Benton, Iowa	39 min
Oct 9, 3:09 PM CDT	Tornado Warning	DVN	Delaware	51 min
Oct 9, 3:38 PM CDT	Tornado Warning	DVN	Benton, Iowa	52 min
Oct 9, 4:03 PM CDT	Tornado Warning	DVN	Iowa, Keokuk, Washington	27 min
Oct 9, 4:31 PM CDT	Tornado Warning	DVN	Iowa, Johnson	44 min
Oct 9, 5:14 PM CDT	Tornado Warning	DVN	Benton, Iowa, Johnson, Linn	46 min
Oct 9, 5:51 PM CDT	Tornado Warning	DVN	Linn	24 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.