Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Tucson, AZ

August 2, 2021Graham County, Arizona

NWS Tucson, AZ issued this special weather statement at Aug 2, 2021, 4:04 PM MST for Graham County, Arizona. It was in force for 56 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 2, 2021, 4:04 PM MST (23:04 UTC)
Expired: Aug 2, 2021, 5:00 PM MST
In force: 56 min
Issued by: NWS Tucson, AZ

County Graham County, AZ

The radar

The Phoenix radar (KIWA), 132 km from the middle of the area, began a volume at 23:04 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 12:00Z, 11.1 hours before the alert went out and 141 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: 719 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 2053 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

454 
WWUS85 KTWC 022304
SPSTWC

Special Weather Statement
National Weather Service Tucson AZ
404 PM MST Mon Aug 2 2021
 
AZZ509>511-030000-
Upper Gila River and Aravaipa Valleys including Clifton/Safford-White
Mountains of Graham and Greenlee Counties including Hannagan
Meadow-Galiuro and Pinaleno Mountains including Mount Graham-
404 PM MST Mon Aug 2 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GRAHAM COUNTY UNTIL
500 PM MST...

At 404 PM MST, Doppler radar was tracking a strong thunderstorm 9
miles east of San Carlos, or 26 miles east of Globe, moving south at
20 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Bylas, Calva and San Carlos Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is also occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3320 10985 3303 11037 3319 11044 3320 11040
      3328 11046 3338 11044 3340 11040 3340 11037
      3343 11032 3344 11020 3346 11017 3346 11000
TIME...MOT...LOC 2304Z 346DEG 16KT 3336 11030 

$$

Meyer

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 5:23 PM MST	Special Weather Statement	TWC		52 min
Aug 1, 6:03 PM MST	Flash Flood Warning	TWC	Graham	3 hr
Aug 1, 6:35 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Aug 1, 6:44 PM MST	Special Weather Statement	TWC		31 min
Aug 1, 8:28 PM MST	Special Weather Statement	TWC	Cochise	47 min
Aug 1, 8:40 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 2, 12:43 PM MST	Special Weather Statement	TWC	Greenlee	47 min
Aug 2, 1:27 PM MST	Special Weather Statement	TWC	Greenlee	48 min
Aug 2, 2:26 PM MST	Excessive Heat Warning	TWC	Graham, Greenlee, Pima, Pinal	54 hr
Aug 2, 2:43 PM MST	Special Weather Statement	TWC	Cochise	47 min
Aug 2, 2:50 PM MST	Severe Thunderstorm Warning	TWC	Cochise	40 min
Aug 2, 2:51 PM MST	Areal Flood Advisory	TWC	Cochise	114 min
Aug 2, 3:20 PM MST	Areal Flood Advisory	TWC	Santa Cruz	115 min
Aug 2, 4:22 PM MST	Areal Flood Advisory	TWC	Cochise	113 min
Aug 2, 4:47 PM MST	Special Weather Statement	TWC		43 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.