Alert archive / Arizona / Tornado Warnings in 2021

Tornado Warning 1, NWS Flagstaff, AZ

October 5, 2021Coconino County, Gila County, Navajo County, Arizona

NWS Flagstaff, AZ issued this tornado warning at Oct 5, 2021, 2:31 PM MST for Coconino County, Gila County, Navajo County, Arizona. It was in force for 29 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 5, 2021, 2:31 PM MST (21:31 UTC)
Expired: Oct 5, 2021, 3:00 PM MST
In force: 29 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

Counties Coconino County, AZ, Gila County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 32 km from the middle of the area, began a volume at 21:32 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 5, 11:46 AM MST	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.5 hours before the alert went out and 123 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: 986 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

543 
WFUS55 KFGZ 052131
TORFGZ
AZC005-007-017-052200-
/O.NEW.KFGZ.TO.W.0001.211005T2131Z-211005T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Flagstaff AZ
231 PM MST Tue Oct 5 2021

The National Weather Service in Flagstaff has issued a

* Tornado Warning for...
  Gila County in east central Arizona...
  Navajo County in north central Arizona...
  Coconino County in north central Arizona...

* Until 300 PM MST.
    
* At 231 PM MST, a severe thunderstorm capable of producing a tornado
  was located over Christopher Creek, or 9 miles west of Forest
  Lakes, moving northeast at 25 mph.

  HAZARD...Tornado and ping pong 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 tornadic thunderstorm will remain over mainly rural areas of
  Gila, Navajo and Coconino Counties, including the following
  locations... Forest Road 9350 Campground, Forest Road 169
  Campground, Spillway Campground, Promontory Pit Road Campground,
  Woods Canyon Lake Campground, Forest Road 195 Campground, Mogollon
  Campground and Crook Campground.

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 3429 11098 3436 11105 3454 11093 3440 11075
TIME...MOT...LOC 2131Z 222DEG 24KT 3435 11097 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN

$$

RR

2 follow-up statements

143 
WWUS55 KFGZ 052144
SVSFGZ

Severe Weather Statement
National Weather Service Flagstaff AZ
244 PM MST Tue Oct 5 2021

AZC007-052152-
/O.CAN.KFGZ.TO.W.0001.000000T0000Z-211005T2200Z/
Gila-
244 PM MST Tue Oct 5 2021

...THE TORNADO WARNING FOR GILA COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM MST for
north central Arizona.

LAT...LON 3433 11093 3438 11098 3454 11093 3440 11075
TIME...MOT...LOC 2142Z 222DEG 24KT 3441 11091 

$$

AZC005-017-052200-
/O.CON.KFGZ.TO.W.0001.000000T0000Z-211005T2200Z/
Navajo-Coconino-
244 PM MST Tue Oct 5 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM MST FOR NAVAJO
AND COCONINO COUNTIES...
    
At 242 PM MST, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of Forest Lakes, moving northeast at 30
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.

Locations impacted include...
Forest Road 169 Campground.

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 3433 11093 3438 11098 3454 11093 3440 11075
TIME...MOT...LOC 2142Z 222DEG 24KT 3441 11091 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

RR

732 
WWUS55 KFGZ 052159
SVSFGZ

Severe Weather Statement
National Weather Service Flagstaff AZ
259 PM MST Tue Oct 5 2021

AZC005-017-052209-
/O.EXP.KFGZ.TO.W.0001.000000T0000Z-211005T2200Z/
Navajo-Coconino-
259 PM MST Tue Oct 5 2021

...THE TORNADO WARNING FOR NAVAJO AND COCONINO COUNTIES WILL EXPIRE
AT 300 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM MST for
north central Arizona.

LAT...LON 3433 11093 3438 11098 3454 11093 3440 11075
TIME...MOT...LOC 2159Z 222DEG 24KT 3447 11084 

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 1:24 PM MST	Severe Thunderstorm Warning	FGZ	Gila	51 min
Oct 5, 2:08 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	37 min
Oct 5, 2:47 PM MST	Severe Thunderstorm Warning Considerable damage threat	FGZ	Gila	43 min
Oct 5, 3:09 PM MST	Tornado Warning	FGZ	Gila, Navajo	21 min
Oct 5, 3:30 PM MST	Severe Thunderstorm Warning Considerable damage threat	FGZ	Gila, Navajo	30 min
Oct 5, 4:20 PM MST	Special Weather Statement	FGZ		40 min
Oct 5, 4:27 PM MST	Special Weather Statement	FGZ	Gila	33 min
Oct 5, 4:31 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	29 min
Oct 5, 4:49 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	41 min

Nearby

Tornado Warnings in Arizona, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.