Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Tucson, AZ

June 27, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 27, 2012, 3:19 PM MST for Pima County, Arizona. It was in force for 26 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: Jun 27, 2012, 3:19 PM MST (22:19 UTC)
Expired: Jun 27, 2012, 3:45 PM MST
In force: 26 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 40 km from the middle of the area, began a volume at 22:22 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 (KTUS), launched 12:00Z, 10.3 hours before the alert went out and 31 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2797 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 101 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.

846 
WUUS55 KTWC 272219
SVRTWC
AZC019-272245-
/O.NEW.KTWC.SV.W.0003.120627T2219Z-120627T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
319 PM MST WED JUN 27 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITY OF GREEN VALLEY...

* UNTIL 345 PM MST

* AT 312 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 7 MILES NORTHEAST OF
  SAHUARITA...OR 15 MILES NORTHEAST OF GREEN VALLEY...AND MOVING WEST
  AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TUCSON INTERNATIONAL AIRPORT...SAN XAVIER MISSION AND RYAN FIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH
ACCOMPANIED BY BLOWING DUST AND LIMITED VISIBILITIES.

&&

LAT...LON 3178 11129 3222 11119 3206 11063 3179 11085
TIME...MOT...LOC 2219Z 111DEG 19KT 3203 11090

$$

2 follow-up statements

372 
WWUS55 KTWC 272232
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
332 PM MST WED JUN 27 2012

AZC019-272245-
/O.CON.KTWC.SV.W.0003.000000T0000Z-120627T2245Z/
PIMA AZ-
332 PM MST WED JUN 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MST
FOR EAST CENTRAL PIMA COUNTY...

AT 329 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THE STRONGEST WINDS ASSOCIATED WITH THIS STORM ARE 
TRACKING WEST ACROSS THE SOUTHERN PORTIONS OF THE TUCSON METRO 
AREA...AS WELL AS SAHUARITA. THESE WINDS HAVE RESULTED IN 
SIGNIFICANT BLOWING DUST...WHICH HAS REDUCED VISIBILITIES BELOW A 
MILE...AND EVEN BELOW A QUARTER MILE IN SOME ISOLATED LOCATIONS. 

A BLOWING DUST ADVISORY REMAINS IN EFFECT UNTIL 4 PM MST THIS 
AFTERNOON FOR THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ENCOUNTER STRONG WINDS...BLOWING DUST AND POOR VISIBILITIES
WHILE DRIVING...PULL OFF THE ROAD IF POSSIBLE...PUT THE VEHICLE IN
PARK...TAKE YOUR FOOT OFF THE BRAKE AND WAIT UNTIL THE VISIBILITY
IMPROVES. PROTECT YOUR HEAD FROM POSSIBLE FLYING DEBRIS.

&&

LAT...LON 3178 11129 3222 11119 3206 11063 3179 11085
TIME...MOT...LOC 2229Z 088DEG 19KT 3199 11102

$$

158 
WWUS55 KTWC 272242
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
342 PM MST WED JUN 27 2012

AZC019-272250-
/O.EXP.KTWC.SV.W.0003.000000T0000Z-120627T2245Z/
PIMA AZ-
342 PM MST WED JUN 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 345 PM MST...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS 
DISSIPATED AND THE STRONG THUNDERSTORM OUTFLOW WINDS HAVE WEAKENED 
AS THEY PUSHED WEST. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS 
BEEN ALLOWED TO EXPIRE AT 345 PM MST.

AREAS OF BLOWING DUST WHICH WILL RESULT IN LOCALIZED VISIBILITIES TO 
BELOW A MILE ARE STILL POSSIBLE THROUGH 400 PM MST.

LAT...LON 3178 11129 3222 11119 3206 11063 3179 11085
TIME...MOT...LOC 2240Z 088DEG 19KT 3199 11109

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 2:30 PM MST	Special Weather Statement	TWC	Santa Cruz	30 min
Jun 27, 2:57 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	3 hr

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