Alert archive / Nebraska / Tornado Warnings in 2015

Tornado Warning 13, NWS Omaha, NE

July 15, 2015Richardson County, Nebraska

NWS Omaha, NE issued this tornado warning at Jul 15, 2015, 9:12 PM CDT for Richardson County, Nebraska. It was in force for 22 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: Jul 15, 2015, 9:12 PM CDT (02:12 UTC)
Expired: Jul 15, 2015, 9:34 PM CDT
In force: 22 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Richardson County, NE

The radar

The Topeka radar (KTWX), 125 km from the middle of the area, began a volume at 02:14 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

Topeka, KS (KFOE), launched 00:00Z, 2.2 hours before the alert went out and 120 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: 2186 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1205 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 366 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 19.5

Open this sounding in Storm Lab

The text

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

660 
WFUS53 KOAX 160212
TOROAX
NEC147-160245-
/O.NEW.KOAX.TO.W.0013.150716T0212Z-150716T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
912 PM CDT WED JUL 15 2015

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL RICHARDSON COUNTY IN SOUTHEASTERN NEBRASKA...

* UNTIL 945 PM CDT
    
* AT 912 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES SOUTHWEST OF VERDON...OR 10 MILES WEST
  OF FALLS CITY...MOVING EAST AT 10 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. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTH CENTRAL RICHARDSON COUNTY...INCLUDING THE FOLLOWING
  LOCATIONS...THE HIGHWAY 75 AND 8 JUNCTION AND SALEM.

THIS INCLUDES HIGHWAY 75 IN NEBRASKA BETWEEN MILE MARKERS 4 AND 7.
 
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 4006 9585 4010 9585 4010 9571 4002 9574
TIME...MOT...LOC 0212Z 276DEG 7KT 4007 9580 

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

$$

BOUSTEAD

1 follow-up statement

161 
WWUS53 KOAX 160234
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
934 PM CDT WED JUL 15 2015

NEC147-160244-
/O.CAN.KOAX.TO.W.0013.000000T0000Z-150716T0245Z/
RICHARDSON NE-
934 PM CDT WED JUL 15 2015

...THE TORNADO WARNING FOR SOUTH CENTRAL RICHARDSON COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER HEAVY RAIN IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4006 9585 4010 9585 4010 9571 4002 9574
TIME...MOT...LOC 0232Z 276DEG 7KT 4007 9574 

$$

BOUSTEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 9:07 PM CDT	Special Weather Statement	OAX	Richardson	38 min
Jul 15, 9:19 PM CDT	Tornado Warning	OAX	Richardson	26 min
Jul 15, 9:22 PM CDT	Severe Thunderstorm Warning	OAX	Cass	38 min
Jul 15, 9:41 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson	49 min
Jul 15, 9:49 PM CDT	Special Weather Statement	OAX	Richardson	41 min
Jul 15, 10:12 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	48 min
Jul 15, 10:50 PM CDT	Special Weather Statement	OAX	Johnson, Otoe, Pawnee	25 min
Jul 15, 11:30 PM CDT	Special Weather Statement	OAX	Cass, Nemaha, Otoe	45 min
Jul 15, 11:45 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe	30 min
Jul 16, 2:17 AM CDT	Special Weather Statement	OAX	Cass, Sarpy	43 min
Jul 16, 2:40 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	35 min
Jul 16, 2:55 PM CDT	Heat Advisory	OAX	Burt, Cass, Dodge, Douglas, Gage, Jefferson and 11 more	29 hr
Jul 16, 2:55 PM CDT	Heat Advisory	OAX	Cass, Douglas, Gage, Jefferson, Johnson, Nemaha and 4 more	47 hr
Jul 16, 6:00 PM CDT	Special Weather Statement	OAX	Stanton	30 min
Jul 16, 6:26 PM CDT	Special Weather Statement	OAX	Madison	49 min
Jul 16, 6:33 PM CDT	Special Weather Statement	OAX	Cuming	42 min
Jul 16, 6:56 PM CDT	Special Weather Statement	OAX	Cedar	49 min

Nearby

Tornado Warnings in Nebraska, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.