Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Flagstaff, AZ

July 16, 2021Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 16, 2021, 5:19 PM MST for Yavapai County, Arizona. It was in force for 26 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, 5:19 PM MST (00:19 UTC)
Expired: Jul 16, 2021, 5:45 PM MST
In force: 26 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 45 km from the middle of the area, began a volume at 00:18 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, 0.3 hours before the alert went out and 90 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: 347 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1689 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

660 
WUUS55 KFGZ 170019
SVRFGZ
AZC025-170045-
/O.NEW.KFGZ.SV.W.0049.210717T0019Z-210717T0045Z/

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

The National Weather Service in Flagstaff has issued a

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

* Until 545 PM MST.

* At 519 PM MST, a severe thunderstorm was located near Childs Power
  Plant, or 15 miles southeast of Camp Verde, and is nearly
  stationary.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3446 11164 3442 11161 3439 11167 3442 11170
TIME...MOT...LOC 0019Z 038DEG 2KT 3442 11166 

HAIL...1.00IN
WIND...<50MPH
 
$$

McCollum

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 5:30 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	26 min
Jul 16, 5:55 PM MST	Areal Flood Advisory	FGZ	Coconino, Gila, Yavapai	3 hr
Jul 16, 6:38 PM MST	Special Weather Statement	FGZ	Yavapai	52 min
Jul 16, 7:24 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 16, 10:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	6 hr
Jul 17, 1:47 PM MST	Special Weather Statement	FGZ		28 min
Jul 17, 2:24 PM MST	Special Weather Statement	FGZ		21 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.