Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 182, NWS Tucson, AZ

September 5, 2021Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 5, 2021, 4:16 PM MST for Pima County, Arizona. It was in force for 59 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
Sep 5, 2021, 4:16 PM MST (23:16 UTC)
Expired
Sep 5, 2021, 5:15 PM MST
In force
59 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Damage threat
Considerable
Hail
0.75 in
Wind
70.0 mph

County Pima County, AZ

The radar

The Tucson radar (KEMX), 54 km from the middle of the area, began a volume at 23:16 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, 11.3 hours before the alert went out and 32 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2021-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1016 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2021-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1016 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
1856 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

038 
WUUS55 KTWC 052316
SVRTWC
AZC019-060015-
/O.NEW.KTWC.SV.W.0182.210905T2316Z-210906T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
416 PM MST Sun Sep 5 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  East central Pima County in southeastern Arizona...

* Until 515 PM MST.

* At 415 PM MST, a severe thunderstorm was located 7 miles southwest
  of Pascua Pueblo Yaqui Reservation, or 11 miles northwest of
  Sahuarita, moving west at 15 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Sahuarita, Three Points, Pascua Pueblo Yaqui Reservation, and 
  Summit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11106 3196 11089 3181 11140 3207 11150
TIME...MOT...LOC 2315Z 077DEG 15KT 3202 11115 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Meyer
2 follow-up statements
675 
WWUS55 KTWC 052349
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
449 PM MST Sun Sep 5 2021

AZC019-060015-
/O.CON.KTWC.SV.W.0182.000000T0000Z-210906T0015Z/
Pima-
449 PM MST Sun Sep 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MST
FOR EAST CENTRAL PIMA COUNTY...

At 448 PM MST, a severe thunderstorm was located 7 miles south of
Three Points, or 15 miles northwest of Green Valley, moving west at
15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Three Points, Pascua Pueblo Yaqui Reservation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11106 3196 11089 3181 11140 3207 11150
TIME...MOT...LOC 2348Z 068DEG 14KT 3195 11126 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Meyer
524 
WWUS55 KTWC 060007
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
507 PM MST Sun Sep 5 2021

AZC019-060016-
/O.EXP.KTWC.SV.W.0182.000000T0000Z-210906T0015Z/
Pima-
507 PM MST Sun Sep 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 515 PM MST...
                
The storm which prompted the warning southeast of Three Points has 
weakened below severe limits. Therefore, the warning will be allowed 
to expire. However heavy rain is still possible with this 
thunderstorm.

LAT...LON 3211 11106 3196 11089 3181 11140 3207 11150
TIME...MOT...LOC 0006Z 077DEG 15KT 3194 11132 

$$

Meyer

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 11:52 AM MSTSpecial Weather StatementTWCSanta Cruz23 min
Sep 5, 12:12 PM MSTSpecial Weather StatementTWCCochise33 min
Sep 5, 12:24 PM MSTSevere Thunderstorm WarningTWCCochise51 min
Sep 5, 12:37 PM MSTAreal Flood AdvisoryTWCCochise7 min
Sep 5, 12:44 PM MSTFlash Flood Warning Considerable damage threatTWCCochise106 min
Sep 5, 12:58 PM MSTSevere Thunderstorm WarningTWCCochise19 min
Sep 5, 1:02 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz43 min
Sep 5, 1:26 PM MSTAreal Flood AdvisoryTWCSanta Cruz2 hr
Sep 5, 2:10 PM MSTSpecial Weather StatementTWCSanta Cruz50 min
Sep 5, 2:15 PM MSTSpecial Weather StatementTWCGraham45 min
Sep 5, 2:25 PM MSTSpecial Weather StatementTWCSanta Cruz50 min
Sep 5, 2:29 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee61 min
Sep 5, 2:31 PM MSTSevere Thunderstorm WarningTWCCochise, Pima44 min
Sep 5, 2:34 PM MSTSpecial Weather StatementTWCGraham41 min
Sep 5, 2:54 PM MSTAreal Flood AdvisoryTWCPima111 min
Sep 5, 3:08 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCPima, Santa Cruz37 min
Sep 5, 3:13 PM MSTFlash Flood Warning Considerable damage threatTWCPima2 hr
Sep 5, 3:15 PM MSTTornado WarningTWCPima15 min
Sep 5, 3:22 PM MSTDust Storm WarningTWCPima113 min
Sep 5, 3:24 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee66 min
Sep 5, 3:37 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz53 min
Sep 5, 3:40 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCPima50 min
Sep 5, 3:41 PM MSTFlash Flood Warning Considerable damage threatTWCGraham2 hr
Sep 5, 3:52 PM MSTSevere Thunderstorm WarningTWCPima38 min
Sep 5, 3:55 PM MSTAreal Flood AdvisoryTWCPima2 hr
Sep 5, 4:00 PM MSTSevere Thunderstorm Warning Considerable damage threatTWCGraham45 min
Sep 5, 4:06 PM MSTAreal Flood AdvisoryTWCPima114 min
Sep 5, 4:12 PM MSTFlash Flood Warning Considerable damage threatTWCPima3 hr
Sep 5, 4:30 PM MSTSevere Thunderstorm WarningTWCPima45 min
Sep 5, 4:42 PM MSTDust Storm WarningTWCPima, Pinal93 min
Sep 5, 4:42 PM MSTSevere Thunderstorm WarningTWCCochise, Graham63 min
Sep 5, 4:47 PM MSTSevere Thunderstorm WarningTWCPima, Pinal43 min
Sep 5, 4:48 PM MSTFlash Flood WarningTWCPima117 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2021Every 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.