Alert archive / Arizona / Special Weather Statements in 2021

Special Weather Statement, NWS Tucson, AZ

August 1, 2021

NWS Tucson, AZ issued this special weather statement at Aug 1, 2021, 6:44 PM MST. It was in force for 31 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 1, 2021, 6:44 PM MST (01:44 UTC)
Expired: Aug 1, 2021, 7:15 PM MST
In force: 31 min
Issued by: NWS Tucson, AZ

The radar

The Tucson radar (KEMX), 119 km from the middle of the area, began a volume at 01:44 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, 1.7 hours before the alert went out and 157 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: 972 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 2391 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

108 
WWUS85 KTWC 020144
SPSTWC

Special Weather Statement
National Weather Service Tucson AZ
644 PM MST Sun Aug 1 2021
 
AZZ508-020215-
Eastern Cochise County Below 5000 Feet including Douglas/Willcox-
644 PM MST Sun Aug 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL COCHISE COUNTY
UNTIL 715 PM MST...

At 644 PM MST, Doppler radar was tracking a strong thunderstorm near 
Douglas, moving south at 10 mph.

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

Locations impacted include...
Douglas and Pirtleville. 

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.

&&

LAT...LON 3144 10956 3141 10938 3133 10939 3133 10962
      3134 10963
TIME...MOT...LOC 0144Z 014DEG 11KT 3137 10951 

$$

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, 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, 4:04 PM MST	Special Weather Statement	TWC	Graham	56 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.