Alert archive / Iowa / Tornado Warnings in 2018

Tornado Warning 71, NWS Des Moines, IA

October 9, 2018Adair County, Iowa

NWS Des Moines, IA issued this tornado warning at Oct 9, 2018, 5:44 PM CDT for Adair County, Iowa. It was in force for 46 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, 5:44 PM CDT (22:44 UTC)
Expired: Oct 9, 2018, 6:30 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Adair County, IA

The radar

The Des Moines radar (KDMX), 74 km from the middle of the area, began a volume at 22:46 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 9, 1:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.7 hours before the alert went out and 166 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

581 
WFUS53 KDMX 092244
TORDMX
IAC001-092330-
/O.NEW.KDMX.TO.W.0071.181009T2244Z-181009T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
544 PM CDT TUE OCT 9 2018

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Eastern Adair County in southwestern Iowa...

* Until 630 PM CDT.
    
* At 544 PM CDT, a tornado producing storm was located 8 miles
  southeast of Greenfield, moving north at 35 mph.

  HAZARD...Damaging tornado.

  SOURCE...Radar 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 tornadic storm will be near...
  Greenfield around 555 PM CDT.
  Stuart around 620 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Greenfield Municipal Airport, Orient and Nodaway Park.

This includes Interstate 80 between mile markers 81 and 97.
 
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.

&&

LAT...LON 4116 9445 4150 9456 4150 9424 4116 9424
TIME...MOT...LOC 2244Z 176DEG 30KT 4123 9434 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

5 follow-up statements

670 
WWUS53 KDMX 092250
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
550 PM CDT TUE OCT 9 2018

IAC001-092330-
/O.CON.KDMX.TO.W.0071.000000T0000Z-181009T2330Z/
Adair IA-
550 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EASTERN
ADAIR COUNTY...
    
At 549 PM CDT, a confirmed tornado was located 7 miles east of
Greenfield, moving north at 30 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornadojust north of Zion or 
         east northeast of Orient.

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...
  Stuart around 620 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Greenfield Municipal Airport and Orient.

This includes Interstate 80 between mile markers 81 and 97.
 
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.

&&

LAT...LON 4119 9443 4150 9456 4150 9424 4124 9424
TIME...MOT...LOC 2249Z 180DEG 28KT 4126 9432 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

912 
WWUS53 KDMX 092258
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
558 PM CDT TUE OCT 9 2018

IAC001-092330-
/O.CON.KDMX.TO.W.0071.000000T0000Z-181009T2330Z/
Adair IA-
558 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN ADAIR COUNTY...
    
At 558 PM CDT, a confirmed tornado was located 7 miles east of
Greenfield, moving north at 35 mph.

HAZARD...Damaging tornado.

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...
  Stuart around 620 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Greenfield Municipal Airport.

This includes Interstate 80 between mile markers 81 and 97.
 
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.

&&

LAT...LON 4126 9441 4150 9456 4150 9424 4129 9424
TIME...MOT...LOC 2258Z 176DEG 30KT 4134 9433 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

568 
WWUS53 KDMX 092305
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
605 PM CDT TUE OCT 9 2018

IAC001-092330-
/O.CON.KDMX.TO.W.0071.000000T0000Z-181009T2330Z/
Adair IA-
605 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN ADAIR COUNTY...
        
At 604 PM CDT, a confirmed tornado was located 7 miles south of
Stuart, or 10 miles northeast of Greenfield, moving north at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado just north of Arbor Hill.

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...
  Stuart around 615 PM CDT.

This includes Interstate 80 between mile markers 84 and 97.
 
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.

&&

LAT...LON 4135 9442 4150 9450 4150 9424 4135 9424
TIME...MOT...LOC 2304Z 180DEG 37KT 4139 9430 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

591 
WWUS53 KDMX 092315
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
615 PM CDT TUE OCT 9 2018

IAC001-092330-
/O.CON.KDMX.TO.W.0071.000000T0000Z-181009T2330Z/
Adair IA-
615 PM CDT TUE OCT 9 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN ADAIR COUNTY...
        
At 614 PM CDT, a confirmed tornado was located over Stuart, or 14
miles northeast of Greenfield, moving north at 35 mph.

HAZARD...Damaging tornado.

SOURCE...Radar 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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Adair County.

This includes Interstate 80 between mile markers 85 and 97.
 
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.

&&

LAT...LON 4142 9443 4150 9448 4150 9424 4142 9424
TIME...MOT...LOC 2314Z 176DEG 30KT 4148 9431 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

387 
WWUS53 KDMX 092321
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
621 PM CDT TUE OCT 9 2018

IAC001-092331-
/O.EXP.KDMX.TO.W.0071.000000T0000Z-181009T2330Z/
Adair IA-
621 PM CDT TUE OCT 9 2018

...THE TORNADO WARNING FOR NORTHEASTERN ADAIR COUNTY WILL EXPIRE AT
630 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 900 PM CDT for south central
and southwestern Iowa.

LAT...LON 4142 9443 4150 9448 4150 9424 4142 9424
TIME...MOT...LOC 2321Z 176DEG 30KT 4153 9431 

$$

Donavon

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 8, 7:11 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	34 min
Oct 8, 7:23 PM CDT	Tornado Warning	DMX	Clarke, Decatur	37 min
Oct 8, 7:59 PM CDT	Tornado Warning Tornado observed	DMX	Clarke, Lucas, Warren	31 min
Oct 8, 9:54 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek	21 min
Oct 8, 10:03 PM CDT	Tornado Warning	DMX	Poweshiek	15 min
Oct 8, 10:26 PM CDT	River Flood Warning	DMX	Polk	7 days
Oct 8, 10:26 PM CDT	River Flood Warning	DMX	Polk	7 days
Oct 8, 10:31 PM CDT	River Flood Watch	DMX	Decatur	3 hr
Oct 9, 12:58 AM CDT	River Flood Warning	DMX	Decatur	4 days
Oct 9, 1:48 AM CDT	Areal Flood Warning	DMX	Clarke, Decatur, Jasper, Lucas, Mahaska, Marion and 6 more	24 hr
Oct 9, 2:49 AM CDT	River Flood Warning	DMX	Polk, Story	3 days
Oct 9, 6:39 AM CDT	River Flood Warning	DMX	Marshall	7 days
Oct 9, 6:39 AM CDT	River Flood Warning	DMX	Black Hawk	6 days
Oct 9, 6:39 AM CDT	River Flood Warning	DMX	Dallas, Greene	5 days
Oct 9, 10:20 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	35 hr
Oct 9, 10:20 AM CDT	River Flood Warning	DMX	Lucas, Wayne	64 hr
Oct 9, 11:33 AM CDT	River Flood Warning	DMX	Dallas, Polk	6 days
Oct 9, 12:38 PM CDT	River Flood Watch	DMX	Davis, Wapello	10 hr
Oct 9, 2:16 PM CDT	Tornado Warning	DMX	Mahaska, Marion, Monroe	29 min
Oct 9, 3:22 PM CDT	River Flood Warning	DMX	Story	7 hr
Oct 9, 3:22 PM CDT	River Flood Warning	DMX	Story	20 hr
Oct 9, 3:32 PM CDT	Tornado Warning	DMX	Appanoose, Monroe	43 min
Oct 9, 3:42 PM CDT	Tornado Warning	DMX	Mahaska, Marion, Monroe	22 min
Oct 9, 4:21 PM CDT	Tornado Warning Tornado observed	DMX	Poweshiek, Tama	24 min
Oct 9, 4:28 PM CDT	Tornado Warning	DMX	Ringgold, Taylor	47 min
Oct 9, 4:47 PM CDT	River Flood Watch	DMX	Jasper, Marion, Polk	29 hr
Oct 9, 4:58 PM CDT	Tornado Warning Tornado observed	DMX	Tama	32 min
Oct 9, 4:59 PM CDT	Tornado Warning	DMX	Jasper, Poweshiek	31 min
Oct 9, 5:13 PM CDT	Tornado Warning	DMX	Adair, Adams, Union	32 min
Oct 9, 6:11 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Dallas, Guthrie	49 min
Oct 9, 6:30 PM CDT	Tornado Warning	DMX	Polk, Warren	30 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.