Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 33, NWS Des Moines, IA

June 16, 2014Black Hawk County, Bremer County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 16, 2014, 8:16 PM CDT for Black Hawk County, Bremer County, Iowa. It was in force for 29 min. 3 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, 8:16 PM CDT (01:16 UTC)
Expired: Jun 16, 2014, 8:45 PM CDT
In force: 29 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Black Hawk County, IA, Bremer County, IA

The radar

The Des Moines radar (KDMX), 154 km from the middle of the area, began a volume at 01:17 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, 8:21 PM CDT	TSTM WND GST 69	Waterloo Airport, IA	SUSTAINED 60 KNOTS FOR 3 MINUTES
Jun 16, 8:26 PM CDT	TSTM WND GST 68	6 Ne Waterloo, IA	65 TO 70 MPH WIND GUST. SEVERAL SMALL TREE LIMBS DOWN. DIAMETER UNKNOWN.
Jun 16, 8:50 PM CDT	TSTM WND DMG	6 N Waterloo, IA	DOWNED TREE BLOCKING THE ROAD. REPORT VIA SOCIAL MEDIA

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, 5:37 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.3 hours before the alert went out and 180 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: 2074 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

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

044 
WFUS53 KDMX 170116
TORDMX
IAC013-017-170145-
/O.NEW.KDMX.TO.W.0033.140617T0116Z-140617T0145Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN BLACK HAWK COUNTY IN NORTHEAST IOWA...
  SOUTHEASTERN BREMER COUNTY IN NORTHEAST IOWA...

* UNTIL 845 PM CDT
    
* AT 816 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR WATERLOO MUNICIPAL AIRPORT...OR 6 MILES
  NORTH OF CEDAR FALLS...MOVING EAST AT 40 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...
  WATERLOO...CEDAR FALLS...DENVER...WATERLOO MUNICIPAL AIRPORT...
  JANESVILLE AND DUNKERTON.

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 4249 9208 4258 9252 4266 9250 4270 9208
TIME...MOT...LOC 0116Z 275DEG 36KT 4261 9241 

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

$$

COGIL

1 follow-up statement

315 
WWUS53 KDMX 170147
SVSDMX

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

IAC013-017-170156-
/O.EXP.KDMX.TO.W.0033.000000T0000Z-140617T0145Z/
BLACK HAWK IA-BREMER IA-
847 PM CDT MON JUN 16 2014

...THE TORNADO WARNING FOR NORTHERN BLACK HAWK AND SOUTHEASTERN
BREMER COUNTIES HAS EXPIRED...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING 
HAS BEEN ALLOWED TO EXPIRE. HOWEVER...LARGE HAIL AND DAMAGING WINDS 
REMAIN LIKELY AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT 
FOR THE AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1200 AM CDT TUESDAY MORNING
FOR NORTHERN IOWA.

LAT...LON 4249 9208 4258 9252 4266 9250 4270 9208
TIME...MOT...LOC 0145Z 275DEG 36KT 4261 9241 

$$

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 7:10 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas, Wright	50 min
Jun 16, 7:12 PM CDT	Flash Flood Warning	DMX	Humboldt, Pocahontas	9 hr
Jun 16, 7:15 PM CDT	Tornado Warning	DMX	Butler, Franklin	30 min
Jun 16, 7:20 PM CDT	Severe Thunderstorm Warning	DMX	Butler	55 min
Jun 16, 7:25 PM CDT	Tornado Warning Tornado observed	DMX	Palo Alto, Pocahontas	35 min
Jun 16, 7:35 PM CDT	Tornado Warning	DMX	Butler, Franklin	40 min
Jun 16, 7:45 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Humboldt, Webster, Wright	45 min
Jun 16, 7:46 PM CDT	Severe Thunderstorm Warning	DMX	Bremer, Butler, Franklin, Grundy, Hardin	59 min
Jun 16, 7:53 PM CDT	Tornado Warning	DMX	Black Hawk, Bremer, Butler	37 min
Jun 16, 7:54 PM CDT	Flash Flood Warning	DMX	Butler, Franklin, Grundy, Hardin	3 hr
Jun 16, 8:04 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Grundy	56 min
Jun 16, 8:15 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin, Marshall, Story	45 min
Jun 16, 8:19 PM CDT	River Flood Warning	DMX	Emmet	19 days
Jun 16, 8:19 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Hardin, Marshall, Tama	41 min
Jun 16, 8:22 PM CDT	Tornado Warning Tornado observed	DMX	Bremer	23 min
Jun 16, 8:33 PM CDT	Flash Flood Warning	DMX	Grundy, Hamilton, Hardin, Webster, Wright	3 hr
Jun 16, 8:45 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Marshall, Tama	45 min
Jun 16, 8:46 PM CDT	Tornado Warning	DMX	Tama	29 min
Jun 16, 8:59 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Grundy	61 min
Jun 16, 9:06 PM CDT	Special Weather Statement	DMX	Marshall	39 min
Jun 16, 9:25 PM CDT	River Flood Warning	DMX	Humboldt	12 days
Jun 16, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Tama	19 min
Jun 16, 9:41 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	34 min
Jun 16, 11:34 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	56 min
Jun 16, 11:40 PM CDT	Flash Flood Warning	DMX	Grundy, Hamilton, Hardin, Webster, Wright	6 hr
Jun 16, 11:42 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Sac	63 min
Jun 17, 12:01 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Boone, Dallas, Greene, Guthrie	44 min
Jun 17, 12:38 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Guthrie, Madison, Polk, Story and 1 more	52 min
Jun 17, 12:57 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk	33 min
Jun 17, 1:21 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	39 min
Jun 17, 1:24 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	51 min
Jun 17, 1:57 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Lucas, Mahaska, Marion, Monroe, Poweshiek and 1 more	63 min
Jun 17, 2:41 AM CDT	River Flood Warning	DMX	Palo Alto, Pocahontas	11 days
Jun 17, 11:06 AM CDT	River Flood Warning	DMX	Webster	9 days
Jun 17, 3:59 PM CDT	Flash Flood Watch	DMX	Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Emmet and 17 more	15 hr

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.