Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS Tucson, AZ

August 13, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 13, 2012, 6:29 PM MST for Pima County, Arizona. It was in force for 46 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, 6:29 PM MST (01:29 UTC)
Expired: Aug 13, 2012, 7:15 PM MST
In force: 46 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 147 km from the middle of the area, began a volume at 01:33 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

Yuma Prvg Ground, AZ (K1Y7), launched 00:00Z, 1.5 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: 238 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 4137 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -23 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.

486 
WUUS55 KTWC 140129
SVRTWC
AZC019-140215-
/O.NEW.KTWC.SV.W.0068.120814T0129Z-120814T0215Z/

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

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 715 PM MST

* AT 620 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  COUPLE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS 
  IN EXCESS OF 60 MPH. ONE STORM WAS LOCATED JUST EAST OF AJO...AND  
  THE OTHER WAS NORTHWEST OF GU VO...AND MOVING NORTH AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 3249 11288 3250 11251 3202 11248 3201 11280
TIME...MOT...LOC 0127Z 177DEG 5KT 3242 11268

$$

2 follow-up statements

688 
WWUS55 KTWC 140147
SVSTWC

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

AZC019-140215-
/O.CON.KTWC.SV.W.0068.000000T0000Z-120814T0215Z/
PIMA AZ-
647 PM MST MON AUG 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MST
FOR WEST CENTRAL PIMA COUNTY...

AT 639 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATED A COUPLE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH. ONE STORM WAS LOCATED NORTHEAST 
OF AJO...AND THE OTHER WAS SOUTH OF WHY. BOTH WERE MOVING NORTH 
AT 5 MPH.

LAT...LON 3249 11288 3250 11251 3202 11248 3201 11280
TIME...MOT...LOC 0146Z 177DEG 5KT 3245 11268

$$

870 
WWUS55 KTWC 140215
SVSTWC

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

AZC019-140225-
/O.EXP.KTWC.SV.W.0068.000000T0000Z-120814T0215Z/
PIMA AZ-
715 PM MST MON AUG 13 2012

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

LAT...LON 3249 11288 3250 11251 3202 11248 3201 11280
TIME...MOT...LOC 0215Z 177DEG 5KT 3249 11268

$$

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 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.