Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 8, NWS Tucson, AZ

July 12, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 12, 2012, 4:39 PM MST for Pima County, Arizona. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 12, 2012, 4:39 PM MST (23:39 UTC)
Expired
Jul 12, 2012, 5:30 PM MST
In force
51 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 131 km from the middle of the area, began a volume at 23:42 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.

What was reported inside it

TimeReportWhereRemark
Jul 12, 4:45 PM MSTTSTM WND DMGSanta Rosa, AZROOF DAMAGE TO SIX RESIDENCES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 11.7 hours before the alert went out and 111 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2012-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 650 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2012-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
650 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1495 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
36 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.

923 
WUUS55 KTWC 122339
SVRTWC
AZC019-130030-
/O.NEW.KTWC.SV.W.0008.120712T2339Z-120713T0030Z/

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

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITY OF SELLS...

* UNTIL 530 PM MST

* AT 430 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM SANTA ROSA TO 11 MILES NORTHWEST OF SELLS TO 24
  MILES SOUTH OF SELLS...OR ALONG A LINE EXTENDING FROM 31 MILES
  NORTH OF SELLS TO 11 MILES NORTHWEST OF SELLS TO 24 MILES SOUTH OF
  SELLS...AND MOVING WEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIG
  FIELDS...COWLIC...COVERED WELLS...MOUNTAIN VILLAGE...VENTANA...
  KUPK...VAYA CHIN...PISINIMO...PISINEMO...SAN SIMON VILLAGE...SANTA
  CRUZ AND PAPAGO FARMS.

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 11188 3153 11167 3180 11248 3248 11248
TIME...MOT...LOC 2338Z 105DEG 26KT 3236 11210 3204 11208
          3159 11185

$$

GL
2 follow-up statements
162 
WWUS55 KTWC 122357
SVSTWC

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

AZC019-130030-
/O.CON.KTWC.SV.W.0008.000000T0000Z-120713T0030Z/
PIMA AZ-
457 PM MST THU JUL 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR CENTRAL PIMA COUNTY...

AT 449 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM SANTA ROSA TO MOUNTAIN VILLAGE TO
COWLIC...OR ALONG A LINE EXTENDING FROM 32 MILES NORTH OF SELLS TO 18
MILES NORTHWEST OF SELLS TO 12 MILES SOUTHWEST OF SELLS...MOVING WEST
AT 20 MPH.

LAT...LON 3249 11188 3153 11167 3180 11248 3248 11248
TIME...MOT...LOC 2357Z 105DEG 26KT 3237 11214 3211 11216
          3182 11209

$$

GL
407 
WWUS55 KTWC 130010
SVSTWC

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

AZC019-130030-
/O.CON.KTWC.SV.W.0008.000000T0000Z-120713T0030Z/
PIMA AZ-
510 PM MST THU JUL 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR CENTRAL PIMA COUNTY...

AT 505 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 6 MILES NORTHWEST OF ANEGAM TO MOUNTAIN VILLAGE TO 7
MILES SOUTHWEST OF COWLIC...OR ALONG A LINE EXTENDING FROM 37 MILES
NORTH OF SELLS TO 23 MILES NORTHWEST OF SELLS TO 17 MILES SOUTHWEST
OF SELLS...MOVING WEST AT 30 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 11188 3153 11167 3180 11248 3248 11248
TIME...MOT...LOC 0010Z 105DEG 26KT 3242 11216 3212 11225
          3176 11212

$$

GL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 3:14 PM MSTSevere Thunderstorm WarningTWCPima33 min
Jul 12, 3:25 PM MSTSpecial Weather StatementTWCSanta Cruz50 min
Jul 12, 3:39 PM MSTAreal Flood AdvisoryTWCPima2 hr
Jul 12, 3:54 PM MSTSevere Thunderstorm WarningTWCPima51 min
Jul 12, 3:59 PM MSTSpecial Weather StatementTWCPima61 min
Jul 12, 4:30 PM MSTFlash Flood WarningTWCPima2 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.