Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Tucson, AZ

August 7, 2012Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 7, 2012, 10:06 PM MST for Santa Cruz 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 7, 2012, 10:06 PM MST (05:06 UTC)
Expired
Aug 7, 2012, 10:45 PM MST
In force
39 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 30 km from the middle of the area, began a volume at 05:08 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 00:00Z, 5.1 hours before the alert went out and 64 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 00:00Z on 2012-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 939 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 00:00Z on 2012-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 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
939 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
2973 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
51 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.

439 
WUUS55 KTWC 080506
SVRTWC
AZC023-080545-
/O.NEW.KTWC.SV.W.0048.120808T0506Z-120808T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1006 PM MST TUE AUG 7 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN SANTA CRUZ COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 1045 PM MST

* AT 1000 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 NEAR ELGIN...OR 15 MILES
  NORTHWEST OF SIERRA VISTA...AND MOVING WEST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SONOITA

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 3154 11082 3173 11083 3172 11046 3159 11047
TIME...MOT...LOC 0506Z 083DEG 15KT 3169 11052

$$

MEYER
2 follow-up statements
199 
WWUS55 KTWC 080523
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1023 PM MST TUE AUG 7 2012

AZC023-080545-
/O.CON.KTWC.SV.W.0048.000000T0000Z-120808T0545Z/
SANTA CRUZ AZ-
1023 PM MST TUE AUG 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM MST
FOR NORTHEASTERN SANTA CRUZ COUNTY...

AT 1018 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR SONOITA...OR 21 MILES
WEST OF SIERRA VISTA...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 3154 11082 3173 11083 3172 11046 3159 11047
TIME...MOT...LOC 0523Z 084DEG 16KT 3166 11065

$$

MEYER
298 
WWUS55 KTWC 080546
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1046 PM MST TUE AUG 7 2012

AZC023-080555-
/O.EXP.KTWC.SV.W.0048.000000T0000Z-120808T0545Z/
SANTA CRUZ AZ-
1046 PM MST TUE AUG 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SANTA CRUZ COUNTY
HAS EXPIRED...

AT 1045 PM MST THE AREA OF THUNDERSTORMS...NOW WEST OF SONOITA...HAD 
DIMINISHED TO BELOW SEVERE LEVELS. A STRONG OUTFLOW GENERATED BY THE 
STORMS WILL CONTINUE TO PUSH INTO WESTERN AREAS OF THE COUNTY WITH 
WIND GUSTS TO 45 OR 50 MPH POSSIBLE.

LAT...LON 3154 11082 3173 11083 3172 11046 3159 11047
TIME...MOT...LOC 0523Z 084DEG 16KT 3166 11065

$$

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 9:40 PM MSTSpecial Weather StatementTWCCochise50 min
Aug 7, 10:11 PM MSTSpecial Weather StatementTWCSanta Cruz49 min
Aug 7, 10:32 PM MSTSpecial Weather StatementTWCSanta Cruz43 min
Aug 7, 11:03 PM MSTSevere Thunderstorm WarningTWCSanta Cruz42 min
Aug 8, 3:35 PM MSTSpecial Weather StatementTWCGraham25 min
Aug 8, 3:35 PM MSTSevere Thunderstorm WarningTWCPima40 min
Aug 8, 3:41 PM MSTSpecial Weather StatementTWCCochise34 min
Aug 8, 4:02 PM MSTSevere Thunderstorm WarningTWCCochise, Santa Cruz43 min
Aug 8, 4:17 PM MSTSevere Thunderstorm WarningTWCPima58 min
Aug 8, 4:31 PM MSTAreal Flood AdvisoryTWCCochise67 min
Aug 8, 4:46 PM MSTSevere Thunderstorm WarningTWCSanta Cruz44 min
Aug 8, 4:55 PM MSTSevere Thunderstorm WarningTWCPinal65 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.