Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Tucson, AZ

July 10, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 10, 2021, 8:12 PM MST for Pima County, Arizona. It was in force for 48 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 10, 2021, 8:12 PM MST (03:12 UTC)
Expired: Jul 10, 2021, 9:00 PM MST
In force: 48 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Tucson radar (KEMX), 52 km from the middle of the area, began a volume at 03:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 10, 4:52 PM MST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 3.2 hours before the alert went out and 14 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: 1025 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 3304 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

208 
WUUS55 KTWC 110312
SVRTWC
AZC019-110400-
/O.NEW.KTWC.SV.W.0046.210711T0312Z-210711T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
812 PM MST Sat Jul 10 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pima County in southeastern Arizona...

* Until 900 PM MST.

* At 811 PM MST, a number of severe thunderstorms with strong winds 
  are located over the Tucson Metro, moving west at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Tucson, Oro Valley, Marana, Davis-Monthan Air Force Base, Casas
  Adobes, Drexel Heights, Flowing Wells, Tanque Verde, South Tucson,
  Pascua Pueblo Yaqui Reservation, Tortolita, Mount
  Lemmon/Summerhaven, Sabino Canyon Recreation Area, Tucson Estates,
  Saguaro National Park West, Valencia West, Catalina State Park,
  Catalina Foothills, Tucson International Airport and Summit.

This includes the following highways...
 Interstate 10 between mile markers 244 and 277.
 Interstate 19 between mile markers 54 and 63.
 Route 77 between mile markers 70 and 82.
 Route 86 between mile markers 158 and 171.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3249 11068 3199 11076 3213 11122 3236 11130
TIME...MOT...LOC 0311Z 068DEG 18KT 3214 11109 

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

GL

1 follow-up statement

666 
WWUS55 KTWC 110357
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
857 PM MST Sat Jul 10 2021

AZC019-110407-
/O.EXP.KTWC.SV.W.0046.000000T0000Z-210711T0400Z/
Pima-
857 PM MST Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA COUNTY WILL
EXPIRE AT 900 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 brief heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until midnight MST for
southeastern Arizona.

LAT...LON 3249 11068 3199 11076 3213 11122 3236 11130
TIME...MOT...LOC 0357Z 068DEG 18KT 3207 11129 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:10 PM MST	Flash Flood Warning	TWC	Cochise	2 hr
Jul 10, 5:14 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	61 min
Jul 10, 5:15 PM MST	Severe Thunderstorm Warning	TWC	Cochise	45 min
Jul 10, 5:23 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	52 min
Jul 10, 5:30 PM MST	Severe Thunderstorm Warning	TWC	Cochise	60 min
Jul 10, 5:42 PM MST	Flash Flood Warning	TWC	Santa Cruz	2 hr
Jul 10, 5:46 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	59 min
Jul 10, 6:05 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	40 min
Jul 10, 6:13 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	26 min
Jul 10, 6:22 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	53 min
Jul 10, 6:50 PM MST	Special Weather Statement	TWC		25 min
Jul 10, 6:57 PM MST	Dust Storm Warning	TWC	Pima, Santa Cruz	63 min
Jul 10, 6:57 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	48 min
Jul 10, 7:06 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	39 min
Jul 10, 7:07 PM MST	Dust Storm Warning	TWC	Pima, Pinal	83 min
Jul 10, 7:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	61 min
Jul 10, 7:29 PM MST	Flash Flood Warning	TWC	Cochise, Pima	2 hr
Jul 10, 7:35 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	55 min
Jul 10, 8:00 PM MST	Dust Storm Warning	TWC	Pima, Pinal	86 min
Jul 10, 8:06 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 10, 8:22 PM MST	Flash Flood Warning	TWC	Pima	113 min
Jul 10, 8:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	61 min
Jul 10, 8:40 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	66 min
Jul 10, 8:41 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 10, 8:48 PM MST	Areal Flood Advisory	TWC	Pima	117 min
Jul 10, 8:51 PM MST	Areal Flood Advisory	TWC	Pima	114 min
Jul 10, 8:51 PM MST	Tornado Warning	TWC	Pima	14 min
Jul 10, 9:45 PM MST	Special Weather Statement	TWC		60 min
Jul 10, 10:03 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Jul 10, 10:20 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 10, 10:36 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 11, 4:12 PM MST	Special Weather Statement	TWC	Greenlee	33 min
Jul 11, 4:44 PM MST	Special Weather Statement	TWC	Greenlee	46 min

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.