Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this special weather statement at Aug 12, 2021, 3:21 PM MST for Yavapai County, Arizona. It was in force for 24 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
- Aug 12, 2021, 3:21 PM MST (22:21 UTC)
- Expired
- Aug 12, 2021, 3:45 PM MST
- In force
- 24 min
- Issued by
- NWS Flagstaff, AZ
- Hail
- 0.50 in
- Wind
- 40
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 110 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 71 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.
- Mixed-layer CAPE
- 40 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1538 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
560
WWUS85 KFGZ 122221
SPSFGZ
Special Weather Statement
National Weather Service Flagstaff AZ
321 PM MST Thu Aug 12 2021
AZZ008-037-122245-
Yavapai County Valleys and Basins-Yavapai County Mountains-
321 PM MST Thu Aug 12 2021
...A strong thunderstorm will impact portions of Yavapai County
through 345 PM MST...
At 320 PM MST, Doppler radar was tracking a strong thunderstorm near
Chino Valley, moving west at 15 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Chino Valley and Williamson Valley.
This includes State Route 89 between mile markers 325 and 336.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3483 11226 3471 11227 3470 11255 3489 11253
TIME...MOT...LOC 2220Z 097DEG 11KT 3478 11238
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HumphreysThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:35 PM MST | Flash Flood Warning | FGZ | Navajo | 3 hr |
| Aug 12, 5:36 AM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
| Aug 12, 12:34 PM MST | Special Weather Statement | FGZ | Yavapai | 26 min |
| Aug 12, 12:43 PM MST | Special Weather Statement | FGZ | 32 min | |
| Aug 12, 1:08 PM MST | Special Weather Statement | FGZ | 22 min | |
| Aug 12, 1:29 PM MST | Special Weather Statement | FGZ | 31 min | |
| Aug 12, 3:41 PM MST | Flash Flood Warning | FGZ | Coconino | 6 hr |
Nearby
Special Weather Statements in Arizona, 2021Every special weather statement 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.