Alert archive / Iowa / Tornado Warnings in 2006

Tornado Warning 21, NWS Omaha, NE

April 15, 2006Fremont County, Iowa

NWS Omaha, NE issued this tornado warning at Apr 15, 2006, 6:59 PM CDT for Fremont County, Iowa. It was in force for 20 min. 1 report 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: Apr 15, 2006, 6:59 PM CDT (23:59 UTC)
Expired: Apr 15, 2006, 7:19 PM CDT
In force: 20 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Fremont County, IA

The radar

The Omaha radar (KOAX), 81 km from the middle of the area, began a volume at 00:00 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
Apr 15, 7:08 PM CDT	HAIL 1.75	Tabor, IA

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
Apr 15, 5:28 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 12.0 hours before the alert went out and 81 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: 2751 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 85 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.

000 
WFUS53 KOAX 152359
TOROAX
IAC071-160030-
/O.NEW.KOAX.TO.W.0021.060415T2359Z-060416T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
659 PM CDT SAT APR 15 2006

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  FREMONT COUNTY IN SOUTHWEST IOWA

* UNTIL 730 PM CDT

* AT 656 PM CDT...TRAINED STORM SPOTTERS REPORTED A FUNNEL CLOUD.
  RADAR INDICATED A STORM CAPABLE OF PRODUCING A TORNADO NEAR
  SIDNEY...OR ABOUT 37 MILES SOUTHEAST OF OMAHA...MOVING NORTHEAST AT
  40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RANDOLPH AND TABOR...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR A PIECE OF STURDY FURNITURE. IF A BASEMENT IS NOT
AVAILABLE...SEEK SHELTER ON THE LOWEST LEVEL OF THE BUILDING. GO TO
AN INTERIOR ROOM OR HALLWAY. USE BLANKETS OR PILLOWS TO COVER YOUR
BODY AND ALWAYS STAY AWAY FROM WINDOWS.

A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT CDT SUNDAY 
MORNING FOR SOUTHWESTERN IOWA AND NORTHEASTERN NEBRASKA.

LAT...LON 4079 9582 4069 9563 4091 9540 4091 9570

$$

FOBERT/RC

1 follow-up statement

000 
WWUS53 KOAX 160019
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
719 PM CDT SAT APR 15 2006

IAC071-160029-
/O.CAN.KOAX.TO.W.0021.000000T0000Z-060416T0030Z/
FREMONT IA-
719 PM CDT SAT APR 15 2006

...THE TORNADO WARNING FOR FREMONT COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS EXITED THE WARNED AREA...
THUS THE WARNING WHICH WAS IN EFFECT HAS BEEN CANCELLED. HEAVY 
RAIN...SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE IN FAR 
NORTHEAST FREMONT COUNTY UNTIL 730 PM.

A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT CDT SUNDAY 
MORNING FOR SOUTHWESTERN IOWA AND NORTHEASTERN NEBRASKA.

LAT...LON 4079 9582 4069 9563 4091 9540 4091 9570

$$

FOBERT/RC

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 15, 12:46 PM CDT	Wind Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	5 hr
Apr 15, 6:29 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	31 min
Apr 15, 6:37 PM CDT	Tornado Warning	OAX	Fremont	23 min
Apr 15, 6:50 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	40 min
Apr 15, 6:51 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	54 min

Nearby

Tornado Warnings in Iowa, 2006 Every tornado warning in 2006 Tornadoes in 2006

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.