Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 17, NWS Tucson, AZ

July 15, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 15, 2012, 4:09 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 15, 2012, 4:09 PM MST (23:09 UTC)
Expired: Jul 15, 2012, 5:00 PM MST
In force: 51 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 85 km from the middle of the area, began a volume at 23:12 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
Jul 15, 4:20 PM MST	TSTM WND DMG	3 Wnw Marana, AZ	POWER LINES DOWN ALONG TANGERINE ROAD NEAR GLADDEN FARMS.

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, 11.2 hours before the alert went out and 46 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: 509 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1287 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 30 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.

147 
WUUS55 KTWC 152309
SVRTWC
AZC019-160000-
/O.NEW.KTWC.SV.W.0017.120715T2309Z-120716T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
409 PM MST SUN JUL 15 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 500 PM MST

* AT 400 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR   
  AVRA VALLEY...OR NEAR MARANA...AND MOVING NORTH AT 15 TO 20 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 11137 3250 11109 3234 11117 3235 11137
TIME...MOT...LOC 2308Z 200DEG 18KT 3246 11124

$$

1 follow-up statement

384 
WWUS55 KTWC 152327
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
427 PM MST SUN JUL 15 2012

AZC019-160000-
/O.CON.KTWC.SV.W.0017.000000T0000Z-120716T0000Z/
PIMA AZ-
427 PM MST SUN JUL 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MST
FOR NORTH CENTRAL PIMA COUNTY...

AT 418 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED 7 MILES NORTHWEST OF MARANA...MOVING NORTH AT 15 TO 20 MPH.

LAT...LON 3249 11137 3250 11109 3234 11117 3235 11137
TIME...MOT...LOC 2327Z 200DEG 18KT 3255 11120

$$

MOLLERE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 1:35 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Jul 15, 2:25 PM MST	Special Weather Statement	TWC		50 min
Jul 15, 2:36 PM MST	Areal Flood Advisory	TWC	Pima	114 min
Jul 15, 2:48 PM MST	Special Weather Statement	TWC	Santa Cruz	27 min
Jul 15, 2:52 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Jul 15, 3:19 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr
Jul 15, 3:32 PM MST	Special Weather Statement	TWC		58 min
Jul 15, 3:45 PM MST	Special Weather Statement	TWC	Cochise	30 min
Jul 15, 4:05 PM MST	Areal Flood Advisory	TWC	Pinal	115 min
Jul 15, 4:15 PM MST	Flash Flood Warning	TWC	Pima, Santa Cruz	2 hr
Jul 15, 4:20 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Jul 15, 4:38 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 15, 4:54 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	66 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.