Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Tucson, AZ

July 12, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 12, 2012, 5:25 PM MST for Pima County, Arizona. It was in force for 65 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: Jul 12, 2012, 5:25 PM MST (00:25 UTC)
Expired: Jul 12, 2012, 6:30 PM MST
In force: 65 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 135 km from the middle of the area, began a volume at 00:28 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 00:00Z, 0.4 hours before the alert went out and 132 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: 45 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 3067 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 75 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.

209 
WUUS55 KTWC 130025
SVRTWC
AZC019-130130-
/O.NEW.KTWC.SV.W.0009.120713T0025Z-120713T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
525 PM MST THU JUL 12 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 630 PM MST

* AT 519 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 11 MILES NORTH OF SANTA ROSA TO 16 MILES SOUTHWEST OF SANTA
  ROSA TO 40 MILES SOUTH OF SANTA ROSA...OR ALONG A LINE EXTENDING
  FROM 36 MILES SOUTHWEST OF CASA GRANDE TO 28 MILES NORTHWEST OF
  SELLS TO 20 MILES SOUTHWEST OF SELLS...AND MOVING WEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PISINIMO...PISINEMO...VENTANA...SAN SIMON VILLAGE...VAYA CHIN...
  PAPAGO FARMS...SANTA CRUZ...HICKIWAN...GU VO...PIA OIK...CHARCO
  27...KUAKATCH...GUNSIGHT AND WHY.

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 11195 3210 11204 3166 11200 3185 11267
      3229 11278 3250 11271
TIME...MOT...LOC 0025Z 105DEG 26KT 3249 11215 3219 11230
          3177 11221

$$

GL

1 follow-up statement

490 
WWUS55 KTWC 130056
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
556 PM MST THU JUL 12 2012

AZC019-130130-
/O.CON.KTWC.SV.W.0009.000000T0000Z-120713T0130Z/
PIMA AZ-
556 PM MST THU JUL 12 2012

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

AT 547 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM VENTANA TO SAN SIMON VILLAGE TO PAPAGO FARMS...OR
ALONG A LINE EXTENDING FROM 40 MILES SOUTHEAST OF GILA BEND TO 33
MILES NORTHWEST OF SELLS TO 26 MILES SOUTHWEST OF SELLS...MOVING WEST
AT 20 MPH.

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 11195 3210 11204 3166 11200 3185 11267
      3229 11278 3250 11271
TIME...MOT...LOC 0056Z 105DEG 26KT 3252 11233 3217 11245
          3178 11236

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 5:40 PM MST	Special Weather Statement	TWC		35 min
Jul 12, 5:41 PM MST	Areal Flood Advisory	TWC	Pima	109 min
Jul 12, 6:24 PM MST	Severe Thunderstorm Warning	TWC	Pima	51 min
Jul 12, 6:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 12, 6:59 PM MST	Areal Flood Warning	TWC	Pima	6 hr
Jul 12, 11:28 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Jul 13, 1:05 AM MST	Areal Flood Advisory	TWC	Pima	6 hr
Jul 13, 1:26 PM MST	Areal Flood Advisory	TWC	Cochise, Graham, Pima, Pinal	3 hr
Jul 13, 1:49 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 13, 3:34 PM MST	Severe Thunderstorm Warning	TWC	Pinal	26 min
Jul 13, 3:45 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr
Jul 13, 4:26 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 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.