Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 183, NWS Flagstaff, AZ

October 5, 2021Gila County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Oct 5, 2021, 2:47 PM MST for Gila County, Arizona. It was in force for 43 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, 2:47 PM MST (21:47 UTC)
Expired: Oct 5, 2021, 3:30 PM MST
In force: 43 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 60.0 mph

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 99 km from the middle of the area, began a volume at 21:49 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

Tuscon, AZ (KTUS), launched 12:00Z, 9.8 hours before the alert went out and 182 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: 4 J/kg
Mixed-layer CIN: -376 J/kg
Mixed-layer LCL: 2029 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

329 
WUUS55 KFGZ 052147
SVRFGZ
AZC007-052230-
/O.NEW.KFGZ.SV.W.0183.211005T2147Z-211005T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
247 PM MST Tue Oct 5 2021

The National Weather Service in Flagstaff has issued a

* Severe Thunderstorm Warning for...
  Gila County in east central Arizona...

* Until 330 PM MST.

* At 246 PM MST, a severe thunderstorm was located 17 miles east of
  Tonto National Monument, or 18 miles east of Roosevelt, moving
  northeast at 35 mph.

  HAZARD...Two inch hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  Gila County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3369 11084 3365 11090 3369 11095 3400 11073
      3400 11059 3387 11035 3382 11042 3383 11051
      3385 11057 3381 11066 3365 11078
TIME...MOT...LOC 2146Z 223DEG 32KT 3369 11082 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RR

1 follow-up statement

054 
WWUS55 KFGZ 052218
SVSFGZ

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

AZC007-052230-
/O.CON.KFGZ.SV.W.0183.000000T0000Z-211005T2230Z/
Gila-
318 PM MST Tue Oct 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR GILA COUNTY...

At 317 PM MST, a severe thunderstorm was located 18 miles west of
Carrizo, or 30 miles south of Forest Lakes, moving northeast at 35
mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of Gila
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3381 11076 3390 11079 3400 11073 3400 11059
      3387 11035 3382 11042 3383 11051 3385 11057
      3381 11066 3376 11070
TIME...MOT...LOC 2217Z 211DEG 32KT 3393 11061 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

NL

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, 2:31 PM MST	Tornado Warning	FGZ	Coconino, Gila, Navajo	29 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

Severe Thunderstorm Warnings in Arizona, 2021 Every severe thunderstorm warning 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.