Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Tucson, AZ

August 14, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 14, 2012, 4:51 PM MST for Pima 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: Aug 14, 2012, 4:51 PM MST (23:51 UTC)
Expired: Aug 14, 2012, 5:30 PM MST
In force: 39 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 24 km from the middle of the area, began a volume at 23:52 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 12:00Z, 11.9 hours before the alert went out and 23 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: 31 J/kg
Mixed-layer CIN: -319 J/kg
Mixed-layer LCL: 3146 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -36 m²/s²
0-3 km storm-relative helicity: 3 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.

239 
WUUS55 KTWC 142351
SVRTWC
AZC019-150030-
/O.NEW.KTWC.SV.W.0075.120814T2351Z-120815T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
451 PM MST TUE AUG 14 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 530 PM MST

* AT 442 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 10 MILES NORTHEAST OF           
  VAIL...OR 24 MILES EAST OF TUCSON...AND MOVING SOUTHWEST AT 15 TO  
  20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SAGUARO NATIONAL PARK EAST...RITA RANCH...DAVIS-MONTHAN AIR FORCE
  BASE AND CORONA DE TUCSON

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 3188 11074 3219 11092 3229 11068 3233 11046
      3206 11045
TIME...MOT...LOC 2350Z 054DEG 16KT 3209 11060

$$

MOLLERE

1 follow-up statement

475 
WWUS55 KTWC 150029
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
529 PM MST TUE AUG 14 2012

AZC019-150038-
/O.EXP.KTWC.SV.W.0075.000000T0000Z-120815T0030Z/
PIMA AZ-
529 PM MST TUE AUG 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 530 PM MST...

HOWEVER...A SECOND WARNING WAS ISSUED THAT IS STILL IN EFFECT UNTIL 
6 PM MST FOR AREAS FARTHER SOUTH TOWARD CORONA DE TUCSON. 

LAT...LON 3188 11074 3219 11092 3229 11068 3233 11046
      3206 11045
TIME...MOT...LOC 0028Z 054DEG 16KT 3199 11076

$$

MOLLERE

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, 5:50 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 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

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.