Alert archive / Nebraska / Tornado Warnings in 2017

Tornado Warning 4, NWS Omaha, NE

April 15, 2017Fremont County, Iowa; Cass County, Otoe County, Nebraska

NWS Omaha, NE issued this tornado warning at Apr 15, 2017, 4:59 PM CDT for Fremont County, Iowa; Cass County, Otoe County, Nebraska. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 15, 2017, 4:59 PM CDT (21:59 UTC)
Expired: Apr 15, 2017, 5:30 PM CDT
In force: 31 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Fremont County, IA, Cass County, NE, Otoe County, NE

The radar

The Omaha radar (KOAX), 75 km from the middle of the area, began a volume at 21:59 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.0 hours before the alert went out and 75 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: 1748 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: -118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

480 
WFUS53 KOAX 152159
TOROAX
IAC071-NEC025-131-152230-
/O.NEW.KOAX.TO.W.0004.170415T2159Z-170415T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service OMAHA/VALLEY NEBRASKA
459 PM CDT SAT APR 15 2017

The National Weather Service in OMAHA has issued a

* Tornado Warning for...
  West central Fremont County in southwestern Iowa...
  Northeastern Otoe County in southeastern Nebraska...
  Southeastern Cass County in southeastern Nebraska...

* Until 530 PM CDT
    
* At 459 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 4 miles northeast of Syracuse, or 30 miles east of
  Lincoln, moving east at 20 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...
  Nebraska City and Union around 530 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Camp
Catron, Otoe and Dunbar.

This includes the following highways...
 Highway 2 IN Nebraska between mile markers 496 and 502.
 Highway 75 IN Nebraska between mile markers 51 and 59.

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 9617 4073 9617 4084 9584 4077 9584
      4075 9588 4073 9589 4070 9585 4068 9584
      4066 9597
TIME...MOT...LOC 2159Z 265DEG 18KT 4071 9612 

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

$$

BOUSTEAD

4 follow-up statements

477 
WWUS53 KOAX 152203
SVSOAX

Severe Weather Statement
National Weather Service OMAHA/VALLEY NEBRASKA
503 PM CDT SAT APR 15 2017

IAC071-NEC025-131-152230-
/O.CON.KOAX.TO.W.0004.000000T0000Z-170415T2230Z/
Fremont IA-Otoe NE-Cass NE-
503 PM CDT SAT APR 15 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR WEST
CENTRAL FREMONT...NORTHEASTERN OTOE AND SOUTHEASTERN CASS COUNTIES...
    
At 503 PM CDT, a confirmed tornado was located 4 miles northeast of
Syracuse, or 30 miles east of Lincoln, moving east at 5 mph.

HAZARD...Damaging tornado and two inch 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. 

This tornadic thunderstorm will remain over mainly rural areas of
west central Fremont...northeastern Otoe and southeastern Cass
Counties, including the following locations: Camp Catron, Otoe and
Dunbar.

This includes the following highways...
 Highway 2 IN Nebraska between mile markers 496 and 502.
 Highway 75 IN Nebraska between mile markers 51 and 57.

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 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 4069 9613 4072 9613 4084 9584 4077 9584
      4075 9588 4073 9589 4070 9585 4068 9584
      4066 9597
TIME...MOT...LOC 2203Z 267DEG 6KT 4071 9612 

TORNADO...OBSERVED
HAIL...2.00IN

$$

BOUSTEAD

899 
WWUS53 KOAX 152207
SVSOAX

Severe Weather Statement
National Weather Service OMAHA/VALLEY NEBRASKA
507 PM CDT SAT APR 15 2017

IAC071-NEC025-131-152230-
/O.CON.KOAX.TO.W.0004.000000T0000Z-170415T2230Z/
Fremont IA-Otoe NE-Cass NE-
507 PM CDT SAT APR 15 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR WEST
CENTRAL FREMONT...NORTHEASTERN OTOE AND SOUTHEASTERN CASS COUNTIES...
    
At 506 PM CDT, a confirmed tornado was located 4 miles northeast of
Syracuse, or 31 miles east of Lincoln, moving east at 5 mph.

HAZARD...Damaging tornado and two inch 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. 

This tornadic thunderstorm will remain over mainly rural areas of
west central Fremont...northeastern Otoe and southeastern Cass
Counties, including the following locations: Camp Catron, Otoe and
Dunbar.

This includes the following highways...
 Highway 2 IN Nebraska between mile markers 496 and 502.
 Highway 75 IN Nebraska between mile markers 51 and 57.

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 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 4069 9613 4072 9613 4084 9584 4077 9584
      4075 9588 4073 9589 4070 9585 4068 9584
      4066 9597
TIME...MOT...LOC 2206Z 267DEG 6KT 4071 9611 

TORNADO...OBSERVED
HAIL...2.00IN

$$

BOUSTEAD

794 
WWUS53 KOAX 152217
SVSOAX

Severe Weather Statement
National Weather Service OMAHA/VALLEY NEBRASKA
517 PM CDT SAT APR 15 2017

IAC071-NEC025-131-152230-
/O.CON.KOAX.TO.W.0004.000000T0000Z-170415T2230Z/
Fremont IA-Otoe NE-Cass NE-
517 PM CDT SAT APR 15 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR WEST
CENTRAL FREMONT...NORTHEASTERN OTOE AND SOUTHEASTERN CASS COUNTIES...
    
At 517 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southwest of Union, or 37 miles east of Lincoln,
moving east at 20 mph.

HAZARD...Tornado and two inch 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...
Nebraska City and Camp Catron. 

This includes Highway 75 IN Nebraska between mile markers 51 and 57.
 
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 4070 9603 4075 9603 4084 9584 4077 9584
      4075 9588 4073 9589 4070 9585 4068 9584
      4068 9595
TIME...MOT...LOC 2217Z 272DEG 16KT 4072 9599 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BOUSTEAD

865 
WWUS53 KOAX 152225
SVSOAX

Severe Weather Statement
National Weather Service OMAHA/VALLEY NEBRASKA
525 PM CDT SAT APR 15 2017

IAC071-NEC025-131-152235-
/O.EXP.KOAX.TO.W.0004.000000T0000Z-170415T2230Z/
Fremont IA-Otoe NE-Cass NE-
525 PM CDT SAT APR 15 2017

...The TORNADO Warning for WEST CENTRAL FREMONT...NORTHEASTERN OTOE
AND SOUTHEASTERN CASS COUNTIES WILL EXPIRE AT 530 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, large hail remains likely and a Severe 
Thunderstorm Warning remains in effect for the area.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
southwestern Iowa...and southeastern Nebraska.

LAT...LON 4070 9603 4075 9603 4084 9584 4077 9584
      4075 9588 4073 9589 4070 9585 4068 9584
      4068 9595
TIME...MOT...LOC 2225Z 265DEG 18KT 4072 9594 

$$

BOUSTEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 12:43 AM CDT	Special Weather Statement	OAX	Harrison	47 min
Apr 15, 1:41 AM CDT	Special Weather Statement	OAX	Harrison	49 min
Apr 15, 4:39 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	36 min
Apr 15, 4:45 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	30 min
Apr 15, 5:21 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	24 min
Apr 15, 5:43 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	32 min
Apr 15, 6:16 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	29 min
Apr 15, 6:46 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	29 min
Apr 14, 8:56 PM CDT	Special Weather Statement	OAX	Boone	34 min
Apr 14, 9:35 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison, Platte	40 min
Apr 14, 10:15 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Platte	45 min
Apr 14, 10:25 PM CDT	Special Weather Statement	OAX	Platte, Stanton	50 min
Apr 14, 10:34 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Madison, Platte, Stanton	26 min
Apr 14, 11:21 PM CDT	Special Weather Statement	OAX	Colfax, Platte, Stanton	39 min
Apr 14, 11:22 PM CDT	Areal Flood Advisory	OAX	Boone, Madison, Platte	113 min
Apr 15, 12:24 AM CDT	Special Weather Statement	OAX	Burt	51 min
Apr 15, 1:26 AM CDT	Special Weather Statement	OAX	Lancaster, Saunders	49 min
Apr 15, 4:32 PM CDT	Special Weather Statement	OAX	Cass	28 min
Apr 15, 5:28 PM CDT	Special Weather Statement	OAX	Knox	32 min
Apr 15, 5:55 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	35 min
Apr 15, 5:58 PM CDT	Special Weather Statement	OAX	Madison	32 min
Apr 15, 6:03 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Pierce, Platte, Stanton and 1 more	27 min
Apr 15, 6:23 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox, Pierce, Wayne	37 min
Apr 15, 6:25 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Stanton	35 min
Apr 15, 6:26 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	34 min
Apr 15, 6:29 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Platte	46 min
Apr 15, 6:55 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	35 min
Apr 15, 6:57 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Stanton	33 min

Nearby

Tornado Warnings in Nebraska, 2017 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.