Alert archive / Arizona / Tornado Warnings in 2015

Tornado Warning 4, NWS Flagstaff, AZ

October 6, 2015Coconino County, Navajo County, Arizona

NWS Flagstaff, AZ issued this tornado warning at Oct 6, 2015, 5:40 PM MST for Coconino County, Navajo County, Arizona. It was in force for 20 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: Oct 6, 2015, 5:40 PM MST (00:40 UTC)
Expired: Oct 6, 2015, 6:00 PM MST
In force: 20 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon

Counties Coconino County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 92 km from the middle of the area, began a volume at 00:41 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.7 hours before the alert went out and 97 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: 11 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 881 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 110 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.

961 
WFUS55 KFGZ 070040
TORFGZ
AZC005-017-070100-
/O.NEW.KFGZ.TO.W.0004.151007T0040Z-151007T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
540 PM MST TUE OCT 6 2015

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN COCONINO COUNTY IN NORTH CENTRAL ARIZONA...
  WEST CENTRAL NAVAJO COUNTY IN NORTH CENTRAL ARIZONA...

* UNTIL 600 PM MST
    
* AT 539 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 8
  MILES EAST OF LEUPP...OR 17 MILES NORTH OF WINSLOW...AND MOVING
  NORTHEAST AT 25 MPH.

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHEASTERN COCONINO AND WEST CENTRAL NAVAJO COUNTIES.

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 IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3515 11076 3526 11094 3557 11075 3543 11048
TIME...MOT...LOC 0039Z 213DEG 22KT 3527 11081 

$$

RR

2 follow-up statements

816 
WWUS55 KFGZ 070052
SVSFGZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
552 PM MST TUE OCT 6 2015

AZC005-017-070100-
/O.CON.KFGZ.TO.W.0004.000000T0000Z-151007T0100Z/
COCONINO-NAVAJO-
552 PM MST TUE OCT 6 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
SOUTHEASTERN COCONINO AND WEST CENTRAL NAVAJO COUNTIES...
    
AT 551 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 10 
EAST OF LEUPP...OR 21 MILES NORTH OF WINSLOW...MOVING NORTHEAST AT 
25 MPH.

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHEASTERN COCONINO AND WEST CENTRAL NAVAJO COUNTIES.

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 IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3526 11078 3531 11086 3557 11075 3543 11048
TIME...MOT...LOC 0051Z 213DEG 22KT 3533 11076 

$$

RR

049 
WWUS55 KFGZ 070059
SVSFGZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
559 PM MST TUE OCT 6 2015

AZC005-017-070108-
/O.EXP.KFGZ.TO.W.0004.000000T0000Z-151007T0100Z/
COCONINO-NAVAJO-
559 PM MST TUE OCT 6 2015

...THE TORNADO WARNING FOR SOUTHEASTERN COCONINO AND WEST CENTRAL
NAVAJO COUNTIES WILL EXPIRE AT 600 PM MST...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS TO BE CAPABLE OF PRODUCING A TORNADO. 
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER NICKEL 
SIZED HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3526 11078 3531 11086 3557 11075 3543 11048
TIME...MOT...LOC 0056Z 213DEG 22KT 3533 11076 

$$

RR

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 6, 6:06 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	24 min

Nearby

Tornado Warnings in Arizona, 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.