Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 16, NWS Tucson, AZ

July 15, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 15, 2012, 2:52 PM MST for Pima County, Arizona. It was in force for 38 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, 2:52 PM MST (21:52 UTC)
Expired: Jul 15, 2012, 3:30 PM MST
In force: 38 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 146 km from the middle of the area, began a volume at 21:52 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, 2:55 PM MST	HAIL 1	Why, AZ

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

The nearest sounding before it

Phoenix, AZ (KPSR), launched 12:00Z, 9.9 hours before the alert went out and 140 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: 134 J/kg
Mixed-layer CIN: -303 J/kg
Mixed-layer LCL: 1600 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

554 
WUUS55 KTWC 152152
SVRTWC
AZC019-152230-
/O.NEW.KTWC.SV.W.0016.120715T2152Z-120715T2230Z/

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

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 330 PM MST

* AT 248 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 12
  MILES SOUTHEAST OF AJO...OR 48 MILES SOUTH OF GILA BEND...AND
  MOVING NORTHWEST AT 15 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 3244 11305 3252 11287 3251 11261 3249 11255
      3226 11246 3206 11273 3232 11309
TIME...MOT...LOC 2150Z 146DEG 14KT 3226 11275

$$

MEADOWS

3 follow-up statements

687 
WWUS55 KTWC 152202
SVSTWC

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

AZC019-152230-
/O.CON.KTWC.SV.W.0016.000000T0000Z-120715T2230Z/
PIMA AZ-
302 PM MST SUN JUL 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR NORTHWESTERN PIMA COUNTY...

AT 257 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 NEAR WHY...OR 47 MILES SOUTH OF GILA BEND...MOVING NORTH AT
25 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 3228 11248 3220 11260 3214 11274 3232 11306
      3244 11305 3252 11287 3251 11261 3249 11255
TIME...MOT...LOC 2202Z 188DEG 22KT 3231 11276

$$
MEADOWS

671 
WWUS55 KTWC 152211
SVSTWC

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

AZC019-152230-
/O.CON.KTWC.SV.W.0016.000000T0000Z-120715T2230Z/
PIMA AZ-
311 PM MST SUN JUL 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR NORTHWESTERN PIMA COUNTY...

THE NATIONAL WEATHER SERVICE CONTINUES TO TRACK A SEVERE 
THUNDERSTORM NEAR WHY...OR 43 MILES SOUTH OF GILA 
BEND...MOVING NORTH AT 25 MPH. THIS STORM HAS A HISTORY OF PRODUCING 
QUARTER SIZED HAIL...THOUGH THE STORM HAS BEGUN TO DISSIPATE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS!

&&

LAT...LON 3228 11248 3220 11260 3218 11273 3228 11292
      3239 11294 3252 11287 3251 11261 3249 11255
TIME...MOT...LOC 2209Z 188DEG 22KT 3235 11275

$$

MEADOWS

478 
WWUS55 KTWC 152223
SVSTWC

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

AZC019-152230-
/O.CON.KTWC.SV.W.0016.000000T0000Z-120715T2230Z/
PIMA AZ-
323 PM MST SUN JUL 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR NORTHWESTERN PIMA COUNTY...

AT 320 PM MST...THE NATIONAL WEATHER SERVICE CONTINUES TO TRACK A 
DISSIPATING THUNDERSTORM WITH A HISTORY OF PRODUCING QUARTER SIZE 
HAIL. THIS STORM WAS LOCATED 8 MILES EAST OF AJO...OR 37 MILES SOUTH 
OF GILA BEND...MOVING NORTH AT 25 MPH. GIVEN THAT THE STORM HAS  
DISSIPATED...WILL ALLOW TO EXPIRE.

LAT...LON 3228 11248 3220 11260 3218 11273 3228 11292
      3239 11294 3252 11287 3251 11261 3249 11255
TIME...MOT...LOC 2221Z 188DEG 22KT 3242 11274

$$

MEADOWS

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, 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, 4:09 PM MST	Severe Thunderstorm Warning	TWC	Pima	51 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.