Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Tucson, AZ

August 5, 2021Pima County, Arizona

NWS Tucson, AZ issued this special weather statement at Aug 5, 2021, 5:21 PM MST for Pima County, Arizona. It was in force for 39 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 5, 2021, 5:21 PM MST (00:21 UTC)
Expired: Aug 5, 2021, 6:00 PM MST
In force: 39 min
Issued by: NWS Tucson, AZ
Hail: 0.50 in
Wind: 40

County Pima County, AZ

The radar

The Tucson radar (KEMX), 105 km from the middle of the area, began a volume at 00:24 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

Tuscon, AZ (KTUS), launched 00:00Z, 0.4 hours before the alert went out and 89 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: 576 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 3034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

868 
WWUS85 KTWC 060021
SPSTWC

Special Weather Statement
National Weather Service Tucson AZ
521 PM MST Thu Aug 5 2021
 
AZZ502-515-060100-
Tohono O'odham Nation including Sells-Baboquivari Mountains including
Kitt Peak-
521 PM MST Thu Aug 5 2021

...A strong thunderstorm will impact portions of south central Pima
County through 600 PM MST...

At 520 PM MST, Doppler radar was tracking a strong thunderstorm near
Topawa, or 12 miles southeast of Sells, moving southwest at 20 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...
Sells, Topawa, Coldfields, Fresnal Canyon, Artesia, South Komelik and
Ali Molina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3189 11164 3171 11162 3165 11189 3192 11192
TIME...MOT...LOC 0020Z 066DEG 17KT 3176 11180 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

KJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 12:52 PM MST	Special Weather Statement	TWC	Santa Cruz	38 min
Aug 6, 1:16 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	3 hr
Aug 6, 1:26 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	34 min
Aug 6, 1:58 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	47 min
Aug 6, 2:05 PM MST	Areal Flood Advisory	TWC	Santa Cruz	115 min
Aug 6, 2:29 PM MST	Severe Thunderstorm Warning	TWC	Cochise	31 min
Aug 6, 2:36 PM MST	Special Weather Statement	TWC	Pima	24 min
Aug 6, 2:43 PM MST	Areal Flood Advisory	TWC	Graham	2 hr
Aug 6, 2:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	44 min
Aug 6, 2:51 PM MST	Special Weather Statement	TWC	Santa Cruz	24 min
Aug 6, 2:57 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	33 min
Aug 6, 3:00 PM MST	Areal Flood Advisory	TWC	Santa Cruz	2 hr
Aug 6, 3:10 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Aug 6, 3:16 PM MST	Areal Flood Advisory	TWC	Pima	119 min
Aug 6, 3:26 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 3:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise	29 min
Aug 6, 3:40 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 6, 3:46 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	29 min
Aug 6, 3:57 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	4 hr
Aug 6, 3:59 PM MST	Severe Thunderstorm Warning	TWC	Cochise	46 min
Aug 6, 4:12 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 4:19 PM MST	Areal Flood Advisory	TWC	Cochise	116 min
Aug 6, 4:55 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 6, 4:58 PM MST	Special Weather Statement	TWC	Pima	32 min

Nearby

Special Weather Statements in Arizona, 2021 Every 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.