Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 52, NWS Tucson, AZ

August 8, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 8, 2012, 4:17 PM MST for Pima County, Arizona. It was in force for 58 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 8, 2012, 4:17 PM MST (23:17 UTC)
Expired
Aug 8, 2012, 5:15 PM MST
In force
58 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 52 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 18 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 2012-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 80 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 2012-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
80 J/kg
Mixed-layer CIN
-373 J/kg
Mixed-layer LCL
2508 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
122 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.

182 
WUUS55 KTWC 082317
SVRTWC
AZC019-090015-
/O.NEW.KTWC.SV.W.0052.120808T2317Z-120809T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
417 PM MST WED AUG 8 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITIES OF...TUCSON...ORO VALLEY...

* UNTIL 515 PM MST

* AT 412 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 15 MILES EAST OF DOWNTOWN 
  TUCSON...AND MOVING SOUTHWEST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEVEN
  FALLS...SABINO CANYON...SAGUARO NATIONAL PARK EAST...TUCSON
  INTERNATIONAL AIRPORT...SOUTH TUCSON...SAN XAVIER MISSION...RITA
  RANCH...DAVIS-MONTHAN AIR FORCE BASE...CATALINA STATE PARK AND
  CATALINA FOOTHILLS.  STRONG WINDS MAY PRECEDE THE RAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS
OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR
THUNDER...LIGHTNING IS CLOSE ENOUGH TO STRIKE YOU.

&&

LAT...LON 3249 11107 3249 11058 3210 11049 3204 11103
TIME...MOT...LOC 2316Z 063DEG 9KT 3229 11070

$$

KD
2 follow-up statements
768 
WWUS55 KTWC 082345
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
445 PM MST WED AUG 8 2012

AZC019-090015-
/O.CON.KTWC.SV.W.0052.000000T0000Z-120809T0015Z/
PIMA AZ-
445 PM MST WED AUG 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MST
FOR NORTHEASTERN PIMA COUNTY...

AT 436 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 MOUNT
LEMMON/SUMMERHAVEN...OR 13 MILES EAST OF ORO VALLEY...MOVING
SOUTHWEST AT 10 MPH.  THE STORM THAT ORIGINALLY PROMPTED THE WARNING
HAD WEAKENED BUT GUSTY OUTFLOWS ARE STILL POSSIBLE N THE CITY OF
TUCSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS
OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR
THUNDER...LIGHTNING IS CLOSE ENOUGH TO STRIKE YOU.

&&

LAT...LON 3249 11107 3249 11058 3210 11049 3204 11103
TIME...MOT...LOC 2344Z 054DEG 9KT 3244 11077

$$

KD
626 
WWUS55 KTWC 090012
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
512 PM MST WED AUG 8 2012

AZC019-090019-
/O.EXP.KTWC.SV.W.0052.000000T0000Z-120809T0015Z/
PIMA AZ-
512 PM MST WED AUG 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA COUNTY WILL
EXPIRE AT 515 PM MST...

THE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO 
LONGER CONSIDERED SEVERE.  REPORT SEVERE WEATHER OR WEATHER
RELATED DAMAGE TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3249 11107 3249 11058 3210 11049 3204 11103
TIME...MOT...LOC 0009Z 054DEG 9KT 3240 11083

$$

KD

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, 10:06 PM MSTSevere Thunderstorm WarningTWCSanta Cruz39 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, 4:31 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.