Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 12, NWS Des Moines, IA

May 17, 2017Appanoose County, Monroe County, Iowa

NWS Des Moines, IA issued this tornado warning at May 17, 2017, 3:59 PM CDT for Appanoose County, Monroe County, Iowa. It was in force for 46 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: May 17, 2017, 3:59 PM CDT (20:59 UTC)
Expired: May 17, 2017, 4:45 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Appanoose County, IA, Monroe County, IA

The radar

The Des Moines radar (KDMX), 120 km from the middle of the area, began a volume at 21:00 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, 4:15 PM CDT	HAIL 1	3 Ssw Albia, IA
May 17, 4:29 PM CDT	HAIL 1	Albia, IA	FIRE CHIEF REPORTED QUARTER SIZED HAIL IN ALBIA.

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, 12:08 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 215 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.

242 
WFUS53 KDMX 172059
TORDMX
IAC007-135-172145-
/O.NEW.KDMX.TO.W.0012.170517T2059Z-170517T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
359 PM CDT WED MAY 17 2017

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Central Monroe County in south central Iowa...
  Central Appanoose County in south central Iowa...

* Until 445 PM CDT.

* At 359 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Centerville, moving north at 55 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...
  Albia around 420 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Rathbun, Moravia, Mystic, Albia Municipal Airport, Honey Creek State
Park, Cincinnati, Numa, Centerville Municipal Airport and Lovilia.

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 4068 9305 4114 9290 4107 9264 4102 9264
      4063 9292
TIME...MOT...LOC 2059Z 201DEG 48KT 4074 9295 

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

$$

Donavon

5 follow-up statements

923 
WWUS53 KDMX 172106
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
406 PM CDT WED MAY 17 2017

IAC007-135-172145-
/O.CON.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Monroe IA-Appanoose IA-
406 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR CENTRAL
MONROE AND NORTHWESTERN APPANOOSE COUNTIES...
    
At 405 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Centerville, moving northeast at 55 mph.

HAZARD...Tornado and half dollar 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...
  Albia around 420 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Rathbun, Moravia, Mystic, Albia Municipal Airport, Honey Creek State
Park and Lovilia.

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 4075 9302 4114 9290 4107 9264 4102 9264
      4070 9289
TIME...MOT...LOC 2105Z 204DEG 48KT 4080 9290 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Donavon

334 
WWUS53 KDMX 172113
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
413 PM CDT WED MAY 17 2017

IAC007-135-172145-
/O.CON.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Monroe IA-Appanoose IA-
413 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN
MONROE AND NORTH CENTRAL APPANOOSE COUNTIES...
    
At 412 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lake Sundown, or 10 miles north of Centerville,
moving northeast at 50 mph.

HAZARD...Tornado and half dollar 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...
  Albia around 425 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Rathbun, Moravia, Albia Municipal Airport and Honey Creek State 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 4083 9296 4113 9288 4107 9264 4102 9264
      4076 9285
TIME...MOT...LOC 2112Z 205DEG 45KT 4087 9285 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Donavon

545 
WWUS53 KDMX 172119
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
419 PM CDT WED MAY 17 2017

IAC007-135-172145-
/O.CON.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Monroe IA-Appanoose IA-
419 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN
MONROE AND NORTH CENTRAL APPANOOSE COUNTIES...
    
At 419 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Albia, moving northeast at 50 mph.

HAZARD...Tornado and half dollar 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 tornadic thunderstorm will remain over mainly rural areas of
eastern Monroe and north central Appanoose Counties, including the
following locations: Albia Municipal Airport and Moravia.

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 4089 9294 4113 9288 4107 9264 4102 9264
      4087 9278
TIME...MOT...LOC 2119Z 205DEG 45KT 4095 9280 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Donavon

581 
WWUS53 KDMX 172127
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
427 PM CDT WED MAY 17 2017

IAC007-172137-
/O.CAN.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Appanoose IA-
427 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR NORTH CENTRAL APPANOOSE COUNTY 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 700 PM CDT for south central
Iowa.

LAT...LON 4096 9285 4111 9282 4107 9264 4102 9264
      4091 9275
TIME...MOT...LOC 2127Z 201DEG 48KT 4105 9275 

$$

IAC135-172145-
/O.CON.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Monroe IA-
427 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN
MONROE COUNTY...
    
At 427 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Albia, moving north at 55 mph.

HAZARD...Tornado and half dollar 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. 

Locations impacted include...
Albia and Albia Municipal Airport. 

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 4096 9285 4111 9282 4107 9264 4102 9264
      4091 9275
TIME...MOT...LOC 2127Z 201DEG 48KT 4105 9275 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Donavon

171 
WWUS53 KDMX 172139
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
439 PM CDT WED MAY 17 2017

IAC135-172149-
/O.EXP.KDMX.TO.W.0012.000000T0000Z-170517T2145Z/
Monroe IA-
439 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR EASTERN MONROE COUNTY WILL EXPIRE AT 445
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 700 PM CDT for south central
Iowa.

LAT...LON 4096 9285 4111 9282 4107 9264 4102 9264
      4091 9275
TIME...MOT...LOC 2139Z 201DEG 48KT 4119 9268 

$$

Donavon

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:02 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	43 min
May 16, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Crawford, Sac	49 min
May 16, 7:53 PM CDT	Severe Thunderstorm Warning	DMX	Cass	37 min
May 16, 7:59 PM CDT	Tornado Warning	DMX	Carroll	16 min
May 16, 8:15 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Sac, Webster	45 min
May 16, 8:18 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	42 min
May 16, 8:22 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Carroll, Cass, Dallas, Greene and 1 more	38 min
May 16, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Hamilton, Humboldt, Webster, Wright	42 min
May 16, 8:50 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas	40 min
May 16, 8:57 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene, Guthrie	33 min
May 16, 9:18 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Greene, Guthrie	22 min
May 16, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago, Worth	56 min
May 16, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Humboldt, Kossuth, Webster and 1 more	49 min
May 16, 9:30 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story	15 min
May 16, 9:42 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Marshall, Story	34 min
May 16, 9:49 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Worth	26 min
May 16, 10:13 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hamilton, Hardin, Marshall, Story	29 min
May 16, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Cerro Gordo, Franklin, Worth	33 min
May 16, 10:40 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Grundy, Hardin	22 min
May 16, 10:46 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	44 min
May 16, 11:19 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Union	26 min
May 17, 12:35 AM CDT	Special Weather Statement	DMX	Jasper, Mahaska, Poweshiek	40 min
May 17, 2:42 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison	28 min
May 17, 3:02 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	43 min
May 17, 3:14 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	27 min
May 17, 3:28 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	35 min
May 17, 3:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Clarke, Madison, Union	29 min
May 17, 3:37 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Guthrie	23 min
May 17, 3:46 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Carroll, Cass, Clarke, Dallas and 6 more	44 min
May 17, 3:47 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Marion, Union, Warren and 1 more	43 min
May 17, 4:17 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene, Guthrie, Jasper, Madison and 4 more	43 min
May 17, 4:26 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	22 min
May 17, 4:27 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Jasper, Lucas, Mahaska, Marion, Monroe and 4 more	63 min
May 17, 4:36 PM CDT	Tornado Warning	DMX	Mahaska, Monroe, Wapello	27 min
May 17, 4:53 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Grundy, Hamilton, Hardin, Jasper, Marshall and 3 more	67 min
May 17, 5:11 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Webster	49 min
May 17, 5:16 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hamilton, Hancock, Hardin, Wright	59 min
May 17, 5:21 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	39 min
May 17, 5:32 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler	43 min
May 17, 5:53 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Kossuth, Winnebago, Worth	34 min
May 17, 6:01 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	8 min
May 17, 6:16 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	9 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.