Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Flagstaff, AZ

July 16, 2021Gila County, Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 16, 2021, 4:59 PM MST for Gila County, Yavapai County, Arizona. It was in force for 15 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 16, 2021, 4:59 PM MST (23:59 UTC)
Expired: Jul 16, 2021, 5:14 PM MST
In force: 15 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Gila County, AZ, Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 53 km from the middle of the area, began a volume at 00:01 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 12:00Z, 12.0 hours before the alert went out and 100 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: 487 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1090 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

686 
WUUS55 KFGZ 162359
SVRFGZ
AZC007-025-170045-
/O.NEW.KFGZ.SV.W.0048.210716T2359Z-210717T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
459 PM MST Fri Jul 16 2021

The National Weather Service in Flagstaff has issued a

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

* Until 545 PM MST.

* At 458 PM MST, a severe thunderstorm was located over Childs Power
  Plant, or 19 miles southeast of Camp Verde, and is nearly
  stationary.

  HAZARD...Quarter size hail and wind gusts to 45 mph.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected.

* Locations impacted include...
  Childs Power Plant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3433 11177 3440 11169 3439 11164 3430 11163
      3424 11166
TIME...MOT...LOC 2358Z 045DEG 2KT 3431 11171 

HAIL...1.00IN
WIND...60MPH
 
$$

McCollum

1 follow-up statement

533 
WWUS55 KFGZ 170014
SVSFGZ

Severe Weather Statement
National Weather Service Flagstaff AZ
514 PM MST Fri Jul 16 2021

AZC007-025-170023-
/O.CAN.KFGZ.SV.W.0048.000000T0000Z-210717T0045Z/
Gila-Yavapai-
514 PM MST Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR GILA AND YAVAPAI COUNTIES IS
CANCELLED...
                
The storm which prompted the warning over the southern end of Fossil 
Creek has weakened below severe limits, and no longer poses an 
immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3433 11177 3440 11169 3439 11164 3430 11163
      3424 11166
TIME...MOT...LOC 0007Z 045DEG 2KT 3430 11172 

$$

McCollum

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 5:20 PM MST	Areal Flood Advisory	FGZ	Yavapai	115 min
Jul 15, 6:33 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	27 min
Jul 15, 6:55 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Jul 15, 8:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	114 min
Jul 16, 11:56 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 16, 12:03 PM MST	Areal Flood Advisory	FGZ	Yavapai	2 hr
Jul 16, 12:36 PM MST	Areal Flood Advisory	FGZ	Coconino	2 hr
Jul 16, 12:52 PM MST	Special Weather Statement	FGZ		23 min
Jul 16, 1:16 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	29 min
Jul 16, 1:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	115 min
Jul 16, 1:24 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	51 min
Jul 16, 1:44 PM MST	Special Weather Statement	FGZ		46 min
Jul 16, 2:13 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	32 min
Jul 16, 2:25 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Jul 16, 2:59 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	61 min
Jul 16, 3:14 PM MST	Special Weather Statement	FGZ		31 min
Jul 16, 3:43 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	32 min
Jul 16, 4:18 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	12 min
Jul 16, 4:34 PM MST	Severe Thunderstorm Warning	FGZ	Gila	41 min
Jul 16, 4:41 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Jul 16, 4:48 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	20 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.