Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 182, NWS Flagstaff, AZ

October 5, 2021Coconino County, Gila County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Oct 5, 2021, 2:08 PM MST for Coconino County, Gila County, Arizona. It was in force for 37 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, 2:08 PM MST (21:08 UTC)
Expired: Oct 5, 2021, 2:45 PM MST
In force: 37 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Coconino County, AZ, Gila County, AZ

The radar

The Flagstaff radar (KFSX), 33 km from the middle of the area, began a volume at 21:12 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, 9.1 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.

624 
WUUS55 KFGZ 052108
SVRFGZ
AZC005-007-052145-
/O.NEW.KFGZ.SV.W.0182.211005T2108Z-211005T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
208 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...
  Coconino County in north central Arizona...

* Until 245 PM MST.

* At 207 PM MST, a severe thunderstorm was located over Kohls Ranch,
  or 14 miles east of Payson, moving northeast at 25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Christopher Creek, Tonto Village, Kohls Ranch, Hunter Creek, Mead
  Ranch, Forest Road 169 Campground, Bear Flat, Upper Tonto Creek
  Campground, Knoll Lake Campground, Spillway Campground, Ponderosa
  Campground, Sharp Creek Campground, Forest Road 195 Campground,
  Mogollon Campground, Forest Road 9350 Campground, Promontory Pit
  Road Campground, Christopher Creek Campground, Woods Canyon Lake
  Campground and Crook Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3419 11109 3424 11121 3451 11112 3435 11086
TIME...MOT...LOC 2107Z 215DEG 27KT 3430 11109 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

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

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.