Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 77, NWS Tucson, AZ

August 14, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 14, 2012, 5:50 PM MST for Pima County, Arizona. It was in force for 40 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
Aug 14, 2012, 5:50 PM MST (00:50 UTC)
Expired
Aug 14, 2012, 6:30 PM MST
In force
40 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 124 km from the middle of the area, began a volume at 00:53 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 (KDMA), launched 00:00Z, 0.8 hours before the alert went out and 105 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 2012-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 193 joules per kilogram.LCLEL10008507005003002001001 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 2012-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 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
193 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
3692 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-35 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.

199 
WUUS55 KTWC 150050
SVRTWC
AZC019-150130-
/O.NEW.KTWC.SV.W.0077.120815T0050Z-120815T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
550 PM MST TUE AUG 14 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 630 PM MST

* AT 544 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 8 MILES NORTHWEST OF SELLS...AND
  MOVING SOUTHWEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TOPAWA...BIG FIELDS...COWLIC AND VAMORI.

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 3162 11182 3170 11215 3220 11214 3203 11176
TIME...MOT...LOC 0050Z 034DEG 17KT 3194 11202

$$

SMR
2 follow-up statements
487 
WWUS55 KTWC 150108
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
608 PM MST TUE AUG 14 2012

AZC019-150130-
/O.CON.KTWC.SV.W.0077.000000T0000Z-120815T0130Z/
PIMA AZ-
608 PM MST TUE AUG 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MST
FOR CENTRAL PIMA COUNTY...

AT 558 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 BIG FIELDS...OR 10 
MILES WEST OF SELLS...MOVING SOUTH-SOUTHWEST AT 20 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3162 11182 3170 11215 3220 11214 3203 11176
TIME...MOT...LOC 0107Z 034DEG 17KT 3187 11207

$$

SMR
453 
WWUS55 KTWC 150122
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
622 PM MST TUE AUG 14 2012

AZC019-150131-
/O.EXP.KTWC.SV.W.0077.000000T0000Z-120815T0130Z/
PIMA AZ-
622 PM MST TUE AUG 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY WILL
EXPIRE AT 630 PM MST...

AT 620 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE STORM WITHIN THE WARNING AREA CONTINUED TO 
DIMINISH...MINIMIZING THE THREAT FOR WIND GUSTS OVER 60 MPH AND 
LARGE HAIL. THUS...THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED 
TO EXPIRE.

LAT...LON 3162 11182 3170 11215 3220 11214 3203 11176
TIME...MOT...LOC 0121Z 034DEG 17KT 3182 11211

$$

SMR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 5:18 PM MSTSevere Thunderstorm WarningTWCPima42 min
Aug 14, 5:21 PM MSTAreal Flood AdvisoryTWCCochise84 min
Aug 14, 6:10 PM MSTSpecial Weather StatementTWCSanta Cruz65 min
Aug 14, 6:24 PM MSTSpecial Weather StatementTWC51 min
Aug 14, 6:39 PM MSTSpecial Weather StatementTWCPima51 min
Aug 14, 6:41 PM MSTAreal Flood AdvisoryTWCPima79 min
Aug 14, 6:46 PM MSTSevere Thunderstorm WarningTWCPima44 min
Aug 14, 8:02 PM MSTAreal Flood AdvisoryTWCPima88 min
Aug 14, 9:32 PM MSTSpecial Weather StatementTWCPinal58 min
Aug 15, 1:46 AM MSTSevere Thunderstorm WarningTWCPima29 min
Aug 15, 2:06 PM MSTAreal Flood AdvisoryTWCCochise84 min
Aug 15, 2:43 PM MSTFlash Flood WarningTWCCochise92 min
Aug 15, 4:22 PM MSTSpecial Weather StatementTWCGraham53 min
Aug 15, 4:43 PM MSTSpecial Weather StatementTWCCochise47 min

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.