Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 85, NWS Tucson, AZ

August 19, 2012Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 19, 2012, 7:11 PM MST for Pima County, Pinal County, Arizona. It was in force for 49 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: Aug 19, 2012, 7:11 PM MST (02:11 UTC)
Expired: Aug 19, 2012, 8:00 PM MST
In force: 49 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

Counties Pima County, AZ, Pinal County, AZ

The radar

The Tucson radar (KEMX), 36 km from the middle of the area, began a volume at 02:11 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

Time	Report	Where	Remark
Aug 19, 7:38 PM MST	TSTM WND DMG	Tucson, AZ	HOUGHTON AND DREXEL 4-6 TREE BRANCH DOWN

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

The nearest sounding before it

Tuscon, AZ (KDMA), launched 00:00Z, 2.2 hours before the alert went out and 15 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: 309 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 2678 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 16 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.

473 
WUUS55 KTWC 200211
SVRTWC
AZC019-021-200300-
/O.NEW.KTWC.SV.W.0085.120820T0211Z-120820T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
711 PM MST SUN AUG 19 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...MARANA...
  EXTREME SOUTHEASTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 800 PM MST

* AT 706 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 ORO VALLEY AND CATALINA. IN 
  ADDITION STORMS ON THE EAST SIDE OF THE METRO AREA ARE HEADED      
  WEST AND MOVING WEST AT 5 TO 10 MPH.

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

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 3199 11046 3201 11067 3203 11082 3208 11109
      3250 11124 3252 11079 3252 11046
TIME...MOT...LOC 0209Z 048DEG 6KT 3239 11080

$$

MOLLERE

2 follow-up statements

295 
WWUS55 KTWC 200237
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
737 PM MST SUN AUG 19 2012

AZC019-021-200300-
/O.CON.KTWC.SV.W.0085.000000T0000Z-120820T0300Z/
PIMA AZ-PINAL AZ-
737 PM MST SUN AUG 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MST
FOR EXTREME SOUTHEASTERN PINAL AND NORTHEASTERN PIMA COUNTIES...

AT 734 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED NEAR 
SABINO CANYON...OR 9 MILES SOUTHEAST OF ORO VALLEY...MOVING 
SOUTHWEST AT 5 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 
MPH...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM.

&&

LAT...LON 3229 11053 3204 11052 3201 11067 3203 11082
      3208 11109 3250 11124 3252 11079 3252 11052
TIME...MOT...LOC 0237Z 048DEG 6KT 3236 11084

$$

440 
WWUS55 KTWC 200246
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
746 PM MST SUN AUG 19 2012

AZC019-021-200300-
/O.CON.KTWC.SV.W.0085.000000T0000Z-120820T0300Z/
PIMA AZ-PINAL AZ-
746 PM MST SUN AUG 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MST
FOR EXTREME SOUTHEASTERN PINAL AND NORTHEASTERN PIMA COUNTIES...

AT 744 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 SABINO CANYON...OR 8
MILES SOUTHEAST OF ORO VALLEY...MOVING SOUTHWEST AT 5 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING WINDS IN EXCESS OF 55 MPH. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS!

&&

LAT...LON 3251 11053 3234 11059 3213 11058 3203 11067
      3203 11082 3208 11109 3250 11124 3252 11079
TIME...MOT...LOC 0245Z 048DEG 6KT 3235 11085

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 5:05 PM MST	Areal Flood Advisory	TWC	Cochise	85 min
Aug 19, 5:11 PM MST	Special Weather Statement	TWC	Cochise	49 min
Aug 19, 5:13 PM MST	Severe Thunderstorm Warning	TWC	Cochise	47 min
Aug 19, 5:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise	59 min
Aug 19, 5:59 PM MST	Areal Flood Advisory	TWC	Cochise	91 min
Aug 19, 6:19 PM MST	Areal Flood Advisory	TWC	Graham, Pinal	86 min
Aug 19, 6:37 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	23 min
Aug 19, 7:01 PM MST	Special Weather Statement	TWC		44 min
Aug 19, 7:19 PM MST	Flash Flood Warning	TWC	Pima, Pinal	86 min
Aug 19, 7:56 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Aug 19, 8:47 PM MST	Flash Flood Warning	TWC	Pima, Pinal	103 min
Aug 19, 8:58 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Aug 19, 9:25 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	2 hr
Aug 19, 10:56 PM MST	Flash Flood Warning	TWC	Pima	64 min
Aug 20, 4:45 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	79 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.