Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 67, NWS Tucson, AZ

August 13, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 13, 2012, 5:50 PM MST for Pima County, Arizona. It was in force for 40 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 13, 2012, 5:50 PM MST (00:50 UTC)
Expired: Aug 13, 2012, 6:30 PM MST
In force: 40 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 178 km from the middle of the area, began a volume at 00:49 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 (KDMA), launched 00:00Z, 0.8 hours before the alert went out and 160 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: 18 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 4054 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 17 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, in the capitals the NWS used until 2016.

754 
WUUS55 KTWC 140050
SVRTWC
AZC019-140130-
/O.NEW.KTWC.SV.W.0067.120814T0050Z-120814T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
550 PM MST MON AUG 13 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 630 PM MST

* AT 541 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES WEST OF PAPAGO FARMS...
  OR 34 MILES WEST OF SELLS. THIS STORM WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PIA
  OIK AND ALI CHUK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH...
LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM.

&&

LAT...LON 3185 11269 3200 11279 3201 11247 3168 11215
TIME...MOT...LOC 0050Z 161DEG 1KT 3176 11242

$$

2 follow-up statements

724 
WWUS55 KTWC 140101 RRA
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
601 PM MST MON AUG 13 2012

AZC019-140130-
/O.CON.KTWC.SV.W.0067.000000T0000Z-120814T0130Z/
PIMA AZ-
601 PM MST MON AUG 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MST
FOR CENTRAL PIMA COUNTY...

AT 555 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES WEST OF PAPAGO
FARMS...OR 34 MILES WEST OF SELLS. THIS STORM WAS NEARLY STATIONARY.

LAT...LON 3185 11269 3200 11279 3201 11247 3168 11215
TIME...MOT...LOC 0102Z 161DEG 1KT 3176 11242

$$

777 
WWUS55 KTWC 140134
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
634 PM MST MON AUG 13 2012

AZC019-140144-
/O.EXP.KTWC.SV.W.0067.000000T0000Z-120814T0130Z/
PIMA AZ-
634 PM MST MON AUG 13 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY HAS
EXPIRED...

THE STORM WAS NO LONGER SEVERE ALONG THE INTERNATIONAL BORDER. 

LAT...LON 3185 11269 3200 11279 3201 11247 3168 11215
TIME...MOT...LOC 0101Z 161DEG 1KT 3176 11242

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 5:47 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min
Aug 13, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Aug 14, 1:35 PM MST	Special Weather Statement	TWC	Santa Cruz	25 min
Aug 14, 2:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	32 min
Aug 14, 2:32 PM MST	Severe Thunderstorm Warning	TWC	Cochise	43 min
Aug 14, 2:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	45 min
Aug 14, 2:59 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	46 min
Aug 14, 3:14 PM MST	Special Weather Statement	TWC	Cochise	46 min
Aug 14, 3:26 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	64 min
Aug 14, 3:32 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	88 min
Aug 14, 3:45 PM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Aug 14, 4:06 PM MST	Special Weather Statement	TWC	Cochise	39 min
Aug 14, 4:10 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	50 min
Aug 14, 4:45 PM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Aug 14, 4:51 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2012 Every severe thunderstorm warning in 2012

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.