Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 25, NWS Des Moines, IA

June 16, 2014Cerro Gordo County, Hancock County, Worth County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 16, 2014, 6:33 PM CDT for Cerro Gordo County, Hancock County, Worth County, Iowa. It was in force for 27 min. 7 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 16, 2014, 6:33 PM CDT (23:33 UTC)
Expired: Jun 16, 2014, 7:00 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Cerro Gordo County, IA, Hancock County, IA, Worth County, IA

The radar

The Des Moines radar (KDMX), 166 km from the middle of the area, began a volume at 23:36 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 16, 6:40 PM CDT	TORNADO	1 Nne Clear Lake, IA	POSSIBLE TOUCHDOWN
Jun 16, 6:47 PM CDT	TSTM WND DMG	5 N Garner, IA	SEVERAL LARGE TREE LIMBS DOWN NEAR 280TH AND SIOUX AVE. TIME ESTIMATED BY RADAR
Jun 16, 6:48 PM CDT	TSTM WND DMG	4 Nne Garner, IA	MACHINE SHED COMPLETELY DESTROYED. DAMAGE TO FARM HOUSE AND SEVERAL POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jun 16, 6:49 PM CDT	NON-TSTM WND GST 64	Mason City Airport, IA
Jun 16, 6:57 PM CDT	NON-TSTM WND GST 65	Mason City Airport, IA
Jun 16, 6:58 PM CDT	TORNADO	5 Nw Mason City, IA
Jun 16, 7:00 PM CDT	TSTM WND DMG	Clear Lake, IA	REPORT VIA SOCIAL MEDIA. THREE TO 4 INCH TREE LIMBS DOWN AND BLOCKING THE ROAD.

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 16, 12:25 PM CDT	Tornado Watch	SPC	8 hr
Jun 16, 5:37 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.6 hours before the alert went out and 183 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: 15 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1817 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

143 
WFUS53 KDMX 162333
TORDMX
IAC033-081-195-170000-
/O.NEW.KDMX.TO.W.0025.140616T2333Z-140617T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
633 PM CDT MON JUN 16 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL WORTH COUNTY IN NORTH CENTRAL IOWA...
  NORTHEASTERN HANCOCK COUNTY IN NORTH CENTRAL IOWA...
  NORTHWESTERN CERRO GORDO COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 700 PM CDT
    
* AT 633 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 6 MILES SOUTHEAST OF FOREST CITY...MOVING EAST
  AT 60 MPH.

  HAZARD...TORNADO AND QUARTER 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...
  MASON CITY...CLEAR LAKE...FOREST CITY...MANLY...MASON CITY
  MUNICIPAL AIRPORT...VENTURA...FERTILE...MILLER...PILOT KNOB STATE
  PARK...FOREST CITY MUNICIPAL AIRPORT AND MCINTOSH WOODS STATE PARK.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 194 AND 203.
 
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 IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4313 9324 4312 9365 4325 9363 4326 9354
      4326 9349 4329 9320
TIME...MOT...LOC 2333Z 264DEG 54KT 4319 9355 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

COGIL

1 follow-up statement

296 
WWUS53 KDMX 162346
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
646 PM CDT MON JUN 16 2014

IAC033-081-195-170000-
/O.CON.KDMX.TO.W.0025.000000T0000Z-140617T0000Z/
WORTH IA-HANCOCK IA-CERRO GORDO IA-
646 PM CDT MON JUN 16 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR SOUTH
CENTRAL WORTH...NORTHEASTERN HANCOCK AND NORTHWESTERN CERRO GORDO
COUNTIES...
    
AT 645 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR MASON CITY
MUNICIPAL AIRPORT...OR 4 MILES NORTHEAST OF CLEAR LAKE...MOVING EAST
AT 60 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

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. 

LOCATIONS IMPACTED INCLUDE...
MASON CITY...MANLY...MASON CITY MUNICIPAL AIRPORT...CLEAR LAKE...
VENTURA...FERTILE AND MCINTOSH WOODS STATE PARK.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 194 AND 203.
 
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 IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4312 9350 4326 9349 4329 9320 4313 9324
TIME...MOT...LOC 2345Z 265DEG 50KT 4319 9333 

TORNADO...OBSERVED
HAIL...1.00IN

$$

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 12:00 PM CDT	Special Weather Statement	DMX	Crawford	45 min
Jun 16, 1:07 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Crawford	68 min
Jun 16, 1:13 PM CDT	Severe Thunderstorm Warning	DMX	Sac	32 min
Jun 16, 2:57 PM CDT	Special Weather Statement	DMX	Jasper	63 min
Jun 16, 3:28 PM CDT	Flash Flood Watch	DMX	Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 33 more	12 hr
Jun 16, 4:47 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	43 min
Jun 16, 5:09 PM CDT	Flash Flood Warning	DMX	Emmet, Kossuth, Palo Alto	6 hr
Jun 16, 5:11 PM CDT	Tornado Warning	DMX	Emmet, Kossuth	34 min
Jun 16, 5:13 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Palo Alto, Pocahontas	62 min
Jun 16, 5:28 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	62 min
Jun 16, 5:33 PM CDT	Tornado Warning	DMX	Palo Alto	42 min
Jun 16, 5:46 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Wright	59 min
Jun 16, 5:51 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago, Worth	54 min
Jun 16, 5:56 PM CDT	Tornado Warning	DMX	Kossuth, Palo Alto	34 min
Jun 16, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Humboldt, Kossuth, Wright	64 min
Jun 16, 6:33 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	42 min
Jun 16, 6:35 PM CDT	Flash Flood Warning	DMX	Cerro Gordo, Franklin, Hancock, Winnebago, Worth, Wright	9 hr
Jun 16, 6:36 PM CDT	Tornado Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	24 min
Jun 16, 6:43 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Worth	47 min
Jun 16, 6:49 PM CDT	Tornado Warning Tornado observed	DMX	Cerro Gordo, Worth	26 min
Jun 16, 6:53 PM CDT	Tornado Warning Tornado observed	DMX	Cerro Gordo, Franklin, Hancock, Wright	37 min
Jun 16, 6:56 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hamilton, Hardin	34 min

Nearby

Tornado Warnings in Iowa, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.