Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 41, NWS Tucson, AZ

August 5, 2012Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 5, 2012, 6:08 PM MST for Pima County, Arizona. It was in force for 52 min. 2 reports 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
Aug 5, 2012, 6:08 PM MST (01:08 UTC)
Expired
Aug 5, 2012, 7:00 PM MST
In force
52 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 45 km from the middle of the area, began a volume at 01:11 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

TimeReportWhereRemark
Aug 5, 6:30 PM MSTTSTM WND DMGTucson, AZMULTIPLE TREES DOWN IN ROADS THROUGHOUT TUCSON
Aug 5, 6:49 PM MSTTSTM WND DMG5 Ne Davis-Monthan Air, AZTREE FROM MEDIAN DOWN ON SPEEDWAY AND PANTANO

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

The nearest sounding before it

Tuscon, AZ (KDMA), launched 00:00Z, 1.1 hours before the alert went out and 7 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 2012-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 76 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 2012-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
76 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
3368 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
66 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.

799 
WUUS55 KTWC 060108
SVRTWC
AZC019-060200-
/O.NEW.KTWC.SV.W.0041.120806T0108Z-120806T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
608 PM MST SUN AUG 5 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 TUCSON...

* UNTIL 700 PM MST

* AT 607 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 SOUTHEAST OF TUCSON...
  AND MOVING NORTHWEST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  DAVIS-MONTHAN AIR FORCE BASE...SABINO CANYON...TUCSON INTERNATIONAL
  AIRPORT...CATALINA FOOTHILLS...SAN XAVIER MISSION AND SOUTH TUCSON.

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 3209 11117 3241 11106 3232 11070 3200 11076
TIME...MOT...LOC 0109Z 115DEG 13KT 3219 11085

$$

GL
2 follow-up statements
390 
WWUS55 KTWC 060119
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
619 PM MST SUN AUG 5 2012

AZC019-060200-
/O.CON.KTWC.SV.W.0041.000000T0000Z-120806T0200Z/
PIMA AZ-
619 PM MST SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR EAST CENTRAL PIMA COUNTY...

AT 611 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 DAVIS-MONTHAN AIR
FORCE BASE...OR 6 MILES SOUTHEAST OF TUCSON...MOVING NORTHWEST AT 15
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 3209 11117 3241 11106 3232 11070 3200 11076
TIME...MOT...LOC 0120Z 115DEG 13KT 3221 11089

$$

GL
381 
WWUS55 KTWC 060136
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
636 PM MST SUN AUG 5 2012

AZC019-060200-
/O.CON.KTWC.SV.W.0041.000000T0000Z-120806T0200Z/
PIMA AZ-
636 PM MST SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR EAST CENTRAL PIMA COUNTY...

AT 630 PM MST...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
NEAR CATALINA FOOTHILLS...OR NEAR TUCSON...MOVING NORTHWEST AT 15
MPH.

AN URBAN AND SMALL STREAM FLOOD ADVISORY IS ALSO IN EFFECT FOR THE 
TUCSON AREA. 

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 3209 11117 3241 11106 3232 11070 3200 11076
TIME...MOT...LOC 0136Z 115DEG 13KT 3230 11093

$$

GL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:21 PM MSTSpecial Weather StatementTWCSanta Cruz39 min
Aug 5, 5:55 PM MSTSpecial Weather StatementTWC50 min
Aug 5, 6:26 PM MSTAreal Flood AdvisoryTWCPima94 min
Aug 5, 6:56 PM MSTSevere Thunderstorm WarningTWCPima49 min
Aug 5, 6:58 PM MSTSevere Thunderstorm WarningTWCPima24 min
Aug 5, 7:11 PM MSTDust Storm WarningTWCPima, Pinal86 min
Aug 5, 7:32 PM MSTSpecial Weather StatementTWCPinal43 min
Aug 5, 7:48 PM MSTSpecial Weather StatementTWCCochise27 min
Aug 6, 2:23 PM MSTSpecial Weather StatementTWCPima52 min
Aug 6, 4:41 PM MSTSpecial Weather StatementTWC64 min
Aug 6, 4:56 PM MSTSevere Thunderstorm WarningTWCPima34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.