Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Tucson, AZ

July 3, 2021Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 3, 2021, 11:21 AM MST for Santa Cruz 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: Jul 3, 2021, 11:21 AM MST (18:21 UTC)
Expired: Jul 3, 2021, 12:00 PM MST
In force: 39 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 73 km from the middle of the area, began a volume at 18:23 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, 6.4 hours before the alert went out and 88 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: 278 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

536 
WUUS55 KTWC 031821
SVRTWC
AZC023-031900-
/O.NEW.KTWC.SV.W.0017.210703T1821Z-210703T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1121 AM MST Sat Jul 3 2021

The National Weather Service in Tucson has issued a

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

* Until noon MST.

* At 1121 AM MST, a severe thunderstorm was located near Rio Rico, 
  moving west at 10 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Nogales, Rio Rico, Ruby and Pena Blanca Lake. 

This includes Interstate 19 between mile markers 5 and 15.
 
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 3139 11126 3140 11128 3148 11131 3153 11100
      3141 11093 3133 11105 3133 11108
TIME...MOT...LOC 1821Z 068DEG 9KT 3144 11104 

HAIL...<.75IN
WIND...60MPH
 
$$

Carpenter

2 follow-up statements

881 
WWUS55 KTWC 031840
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
1140 AM MST Sat Jul 3 2021

AZC023-031900-
/O.CON.KTWC.SV.W.0017.000000T0000Z-210703T1900Z/
Santa Cruz-
1140 AM MST Sat Jul 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON MST FOR
SOUTHWESTERN SANTA CRUZ COUNTY...

At 1139 AM MST, a severe thunderstorm was located 7 miles southwest
of Rio Rico, moving west at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Nogales, Rio Rico, Ruby and Pena Blanca Lake. 

This includes Interstate 19 between mile markers 5 and 15.
 
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 3139 11126 3140 11128 3148 11131 3153 11100
      3141 11093 3133 11105 3133 11108
TIME...MOT...LOC 1839Z 068DEG 9KT 3142 11109 

HAIL...<.75IN
WIND...60MPH
 
$$

Carpenter

684 
WWUS55 KTWC 031900
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
1200 PM MST Sat Jul 3 2021

AZC023-031909-
/O.EXP.KTWC.SV.W.0017.000000T0000Z-210703T1900Z/
Santa Cruz-
1200 PM MST Sat Jul 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SANTA CRUZ COUNTY
WILL EXPIRE AT NOON 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 heavy rain
is still possible with this thunderstorm.

LAT...LON 3139 11126 3140 11128 3148 11131 3153 11100
      3141 11093 3133 11105 3133 11108
TIME...MOT...LOC 1859Z 068DEG 9KT 3140 11114 

$$

Carpenter

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 5:17 PM MST	Special Weather Statement	TWC	Pinal	43 min
Jul 2, 5:31 PM MST	Special Weather Statement	TWC		44 min
Jul 2, 5:35 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	40 min
Jul 2, 6:14 PM MST	Special Weather Statement	TWC		46 min
Jul 2, 6:16 PM MST	Special Weather Statement	TWC	Pima	29 min
Jul 2, 6:16 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	44 min
Jul 2, 7:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 2, 7:34 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	116 min
Jul 3, 11:17 AM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	3 hr
Jul 3, 11:51 AM MST	Special Weather Statement	TWC	Pima	54 min
Jul 3, 11:58 AM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Santa Cruz	3 hr
Jul 3, 12:09 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	111 min
Jul 3, 12:17 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Jul 3, 12:23 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	35 min
Jul 3, 12:28 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Pima, Santa Cruz	3 hr
Jul 3, 1:07 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 3, 1:15 PM MST	Special Weather Statement	TWC	Pima	45 min
Jul 3, 1:20 PM MST	Special Weather Statement	TWC	Pima	40 min
Jul 3, 1:50 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	40 min
Jul 3, 2:14 PM MST	Special Weather Statement	TWC		31 min
Jul 3, 2:56 PM MST	Special Weather Statement	TWC	Pima	34 min
Jul 3, 3:31 PM MST	Special Weather Statement	TWC	Pinal	44 min
Jul 3, 3:44 PM MST	Areal Flood Advisory	TWC	Pima	2 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.