Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 126, NWS Tucson, AZ

August 8, 2021Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 8, 2021, 4:21 PM MST for Santa Cruz County, Arizona. It was in force for 84 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 8, 2021, 4:21 PM MST (23:21 UTC)
Expired: Aug 8, 2021, 5:45 PM MST
In force: 84 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 43 km from the middle of the area, began a volume at 23:24 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 12:00Z, 11.4 hours before the alert went out and 73 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: 359 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 1832 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

545 
WUUS55 KTWC 082321
SVRTWC
AZC023-090045-
/O.NEW.KTWC.SV.W.0126.210808T2321Z-210809T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
421 PM MST Sun Aug 8 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Central Santa Cruz County in southeastern Arizona...

* Until 545 PM MST.

* At 421 PM MST, a severe thunderstorm was located near Patagonia, or
  16 miles northeast of Nogales, and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Patagonia and Patagonia Lake State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3153 11065 3142 11068 3149 11091 3165 11086
TIME...MOT...LOC 2321Z 104DEG 3KT 3147 11068 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

3 follow-up statements

814 
WWUS55 KTWC 082351
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
451 PM MST Sun Aug 8 2021

AZC023-090045-
/O.CON.KTWC.SV.W.0126.000000T0000Z-210809T0045Z/
Santa Cruz-
451 PM MST Sun Aug 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR CENTRAL SANTA CRUZ COUNTY...

At 451 PM MST, a severe thunderstorm was located near Patagonia, or
13 miles northeast of Nogales, moving west at 5 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Patagonia and Patagonia Lake State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3148 11066 3144 11072 3149 11091 3165 11086
      3149 11067
TIME...MOT...LOC 2351Z 108DEG 5KT 3147 11074 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

042 
WWUS55 KTWC 090007
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
507 PM MST Sun Aug 8 2021

AZC023-090045-
/O.CON.KTWC.SV.W.0126.000000T0000Z-210809T0045Z/
Santa Cruz-
507 PM MST Sun Aug 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR CENTRAL SANTA CRUZ COUNTY...

At 506 PM MST, a severe thunderstorm was located near Patagonia, or
13 miles northeast of Nogales, moving northwest at 5 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Patagonia and Patagonia Lake State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3154 11073 3145 11075 3149 11091 3165 11086
TIME...MOT...LOC 0006Z 119DEG 5KT 3151 11079 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

JRM

142 
WWUS55 KTWC 090036
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
536 PM MST Sun Aug 8 2021

AZC023-090046-
/O.EXP.KTWC.SV.W.0126.000000T0000Z-210809T0045Z/
Santa Cruz-
536 PM MST Sun Aug 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SANTA CRUZ COUNTY WILL
EXPIRE AT 545 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.

LAT...LON 3154 11073 3145 11075 3149 11091 3165 11086
TIME...MOT...LOC 0036Z 104DEG 3KT 3152 11082 

$$

JRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 5:46 PM MST	Special Weather Statement	TWC		44 min
Aug 7, 5:54 PM MST	Special Weather Statement	TWC	Greenlee	36 min
Aug 7, 6:19 PM MST	Areal Flood Advisory	TWC	Pima	116 min
Aug 8, 2:48 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Aug 8, 2:54 PM MST	Special Weather Statement	TWC	Greenlee	36 min
Aug 8, 3:08 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 8, 3:42 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min
Aug 8, 3:46 PM MST	Special Weather Statement	TWC		44 min
Aug 8, 4:11 PM MST	Special Weather Statement	TWC	Pima	49 min
Aug 8, 4:12 PM MST	Special Weather Statement	TWC	Santa Cruz	33 min
Aug 8, 4:19 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	86 min
Aug 8, 4:21 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	114 min
Aug 8, 4:26 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 8, 4:33 PM MST	Special Weather Statement	TWC	Cochise	27 min
Aug 8, 4:48 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr

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.