Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 13, NWS Sioux Falls, SD

June 5, 2014Lyon County, Sioux County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Jun 5, 2014, 4:03 PM CDT for Lyon County, Sioux County, Iowa. It was in force for 42 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: Jun 5, 2014, 4:03 PM CDT (21:03 UTC)
Expired: Jun 5, 2014, 4:45 PM CDT
In force: 42 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Observed
Hail: 1.75 in

Counties Lyon County, IA, Sioux County, IA

The radar

The Sioux Falls radar (KFSD), 40 km from the middle of the area, began a volume at 21:05 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 5, 4:34 PM CDT	HAIL 1	Inwood, IA
Jun 5, 4:45 PM CDT	HAIL 1	8 Wnw Rock Valley, IA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.1 hours before the alert went out and 217 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: 446 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 51 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.

193 
WFUS53 KFSD 052103
TORFSD
IAC119-167-052145-
/O.NEW.KFSD.TO.W.0013.140605T2103Z-140605T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
403 PM CDT THU JUN 5 2014

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN LYON COUNTY IN NORTHWEST IOWA...
  NORTHWESTERN SIOUX COUNTY IN NORTHWEST IOWA...

* UNTIL 445 PM CDT

* AT 400 PM CDT...A CONFIRMED TORNADO WAS LOCATED 5 MILES NORTWEST 
  OF CANTON...AND MOVING SOUTHEAST AT 15 MPH.

  HAZARD...DAMAGING TORNADO AND GOLF BALL 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.

* THE TORNADO WILL BE NEAR...
  INWOOD AROUND 440 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO 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 4321 9648 4323 9649 4322 9651 4324 9656
      4326 9656 4327 9659 4330 9658 4329 9655
      4331 9652 4334 9654 4339 9652 4333 9631
      4316 9637
TIME...MOT...LOC 2103Z 306DEG 12KT 4334 9660

TORNADO...OBSERVED
HAIL...1.75IN

$$

SCHUMACHER

1 follow-up statement

751 
WWUS53 KFSD 052113
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
413 PM CDT THU JUN 5 2014

IAC119-167-052145-
/O.CON.KFSD.TO.W.0013.000000T0000Z-140605T2145Z/
SIOUX IA-LYON IA-
413 PM CDT THU JUN 5 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN LYON AND
NORTHWESTERN SIOUX COUNTIES UNTIL 445 PM CDT...

AT 409 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR CANTON...AND MOVING SOUTHEAST AT 25 MPH.

HAZARD...TORNADO AND GOLF BALL 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...
  INWOOD AROUND 420 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO 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 4321 9648 4323 9649 4322 9651 4324 9656
      4326 9656 4327 9659 4330 9658 4329 9655
      4331 9652 4334 9654 4339 9652 4333 9631
      4316 9637
TIME...MOT...LOC 2113Z 297DEG 20KT 4330 9652

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

SCHUMACHER

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 2:50 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	21 min
Jun 5, 3:32 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	43 min
Jun 5, 4:06 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	39 min
Jun 5, 4:38 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Sioux	52 min
Jun 5, 4:40 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	20 min
Jun 5, 5:16 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	44 min
Jun 5, 5:46 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Osceola	19 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.