Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 71, NWS Tucson, AZ

August 14, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 14, 2012, 2:45 PM MST for Pima County, Arizona. It was in force for 45 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, 2:45 PM MST (21:45 UTC)
Expired: Aug 14, 2012, 3:30 PM MST
In force: 45 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 74 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 69 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.

816 
WUUS55 KTWC 142145
SVRTWC
AZC019-142230-
/O.NEW.KTWC.SV.W.0071.120814T2145Z-120814T2230Z/

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

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 330 PM MST

* AT 237 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 10
  MILES SOUTHEAST OF KITT PEAK...OR 24 MILES EAST OF SELLS. THIS
  STORM WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JUNCTION OF HIGHWAY 286 AND ARIVACA ROAD...FRESNAL CANYON...ARIVACA
  LAKE AND ARIVACA.

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 3153 11117 3153 11148 3170 11171 3202 11161
      3195 11116
TIME...MOT...LOC 2145Z 000DEG 1KT 3184 11148

$$

GL

1 follow-up statement

792 
WWUS55 KTWC 142206
SVSTWC

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

AZC019-142230-
/O.CON.KTWC.SV.W.0071.000000T0000Z-120814T2230Z/
PIMA AZ-
306 PM MST TUE AUG 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR SOUTH CENTRAL PIMA COUNTY...

AT 300 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED ALONG HIGHWAY 286...11 MILES NORTH OF JUNCTION OF HIGHWAY 
286 AND ARIVACA ROAD...OR 25 MILES EAST OF SELLS. THIS STORM WAS 
NEARLY STATIONARY.

LAT...LON 3153 11117 3153 11148 3170 11171 3202 11161
      3195 11116
TIME...MOT...LOC 2206Z 000DEG 1KT 3181 11147

$$

GL

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, 2:59 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.