Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 5, NWS Tucson, AZ

June 28, 2012Pima County, Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 28, 2012, 5:28 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 32 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 28, 2012, 5:28 PM MST (00:28 UTC)
Expired
Jun 28, 2012, 6:00 PM MST
In force
32 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

Counties Pima County, AZ, Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 49 km from the middle of the area, began a volume at 00:30 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 00:00Z, 0.5 hours before the alert went out and 51 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 00:00Z on 2012-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 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 00:00Z on 2012-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -48 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
32 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
3575 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-48 m²/s²
0-3 km storm-relative helicity
12 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.

891 
WUUS55 KTWC 290028
SVRTWC
AZC019-023-290100-
/O.NEW.KTWC.SV.W.0005.120629T0028Z-120629T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
528 PM MST THU JUN 28 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITY OF GREEN VALLEY...
  NORTH CENTRAL SANTA CRUZ COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 600 PM MST

* AT 521 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  SOUTHWEST OF GREEN VALLEY...AND MOVING WEST 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 3159 11119 3196 11136 3191 11096 3169 11091
TIME...MOT...LOC 0027Z 092DEG 20KT 3176 11116

$$
2 follow-up statements
906 
WWUS55 KTWC 290050
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
550 PM MST THU JUN 28 2012

AZC019-023-290100-
/O.CON.KTWC.SV.W.0005.000000T0000Z-120629T0100Z/
SANTA CRUZ AZ-PIMA AZ-
550 PM MST THU JUN 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MST
FOR SOUTH CENTRAL PIMA AND NORTH CENTRAL SANTA CRUZ COUNTIES...

AT 548 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM 6 MILES NORTHWEST OF ARIVACA JUNCTION...
OR 8 MILES SOUTHWEST OF GREEN VALLEY...MOVING WEST AT 10 MPH. THIS
STORM CONTINUES TO WEAKEN...BUT IS STILL CAPABLE OF PRODUCING DAMAGING 
WINDS IN EXCESS OF 60 MPH...ESPECIALLY TO THE WEST OF THE STORM
ITSELF.  

LAT...LON 3159 11119 3196 11136 3191 11096 3169 11091
TIME...MOT...LOC 0048Z 082DEG 8KT 3179 11115

$$
626 
WWUS55 KTWC 290059
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
559 PM MST THU JUN 28 2012

AZC019-023-290108-
/O.EXP.KTWC.SV.W.0005.000000T0000Z-120629T0100Z/
SANTA CRUZ AZ-PIMA AZ-
559 PM MST THU JUN 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PIMA AND NORTH
CENTRAL SANTA CRUZ COUNTIES WILL EXPIRE AT 600 PM MST...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS WEAKENED 
BELOW SEVERE LEVELS. THEREFORE...THE SEVERE THUNDERSTORMS WARNING 
HAS BEEN ALLOWED TO EXPIRE AT 6 PM MST. 

HOWEVER...A STRONG THUNDERSTORM 10 MILES SOUTH OF THREE POINTS 
REMAINS STRONG...AND IS CAPABLE OF PRODUCING WINDS TO 50 MPH AND 
SMALL HAIL.


LAT...LON 3159 11119 3196 11136 3191 11096 3169 11091
TIME...MOT...LOC 0058Z 082DEG 8KT 3179 11118

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 5:27 PM MSTAreal Flood AdvisoryTWCPima, Santa Cruz2 hr

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.