Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 39, NWS Tucson, AZ

July 28, 2012Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 28, 2012, 4:04 PM MST for Cochise County, Arizona. It was in force for 41 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: Jul 28, 2012, 4:04 PM MST (23:04 UTC)
Expired: Jul 28, 2012, 4:45 PM MST
In force: 41 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 56 km from the middle of the area, began a volume at 23:07 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, 11.1 hours before the alert went out and 96 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: 34 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1726 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 71 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.

112 
WUUS55 KTWC 282304
SVRTWC
AZC003-282345-
/O.NEW.KTWC.SV.W.0039.120728T2304Z-120728T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
404 PM MST SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN COCHISE COUNTY IN SOUTHEAST ARIZONA...
  THIS INCLUDES THE CITY OF SIERRA VISTA...

* UNTIL 445 PM MST

* AT 400 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 SIERRA
  VISTA...AND MOVING WEST AND NORTHWEST AT 10 TO 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HUACHUCA CITY

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 3134 11045 3172 11042 3156 11008 3136 11017
TIME...MOT...LOC 2304Z 111DEG 10KT 3147 11023

$$

MEYER

2 follow-up statements

411 
WWUS55 KTWC 282332
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
432 PM MST SAT JUL 28 2012

AZC003-282345-
/O.CON.KTWC.SV.W.0039.000000T0000Z-120728T2345Z/
COCHISE AZ-
432 PM MST SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MST
FOR SOUTHWESTERN COCHISE COUNTY...

AT 425 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH AND VERY HEAVY RAIN.  THIS STORM WAS LOCATED NEAR 
SIERRA VISTA...MOVING NORTHWEST AT 10 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3134 11045 3172 11042 3156 11008 3136 11017
TIME...MOT...LOC 2332Z 116DEG 10KT 3153 11032

$$

MEYER

210 
WWUS55 KTWC 282346
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
446 PM MST SAT JUL 28 2012

AZC003-282355-
/O.EXP.KTWC.SV.W.0039.000000T0000Z-120728T2345Z/
COCHISE AZ-
446 PM MST SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COCHISE COUNTY
HAS EXPIRED...

AT 445 PM MST THUNDERSTORMS IN SOUTHWESTERN COCHISE COUNTY HAD 
DIMINISHED IN INTENSITY. SOME AREAS OF LOCALLY HEAVY RAINFALL WILL 
CONTINUE WITH FLASH FLOODING A CONCERN.

LAT...LON 3134 11045 3172 11042 3156 11008 3136 11017
TIME...MOT...LOC 2332Z 116DEG 10KT 3153 11032

$$

MEYER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 6:43 PM MST	Special Weather Statement	TWC		47 min
Jul 27, 8:49 PM MST	Special Weather Statement	TWC		41 min
Jul 28, 11:45 AM MST	Special Weather Statement	TWC	Cochise	30 min
Jul 28, 1:06 PM MST	Special Weather Statement	TWC	Cochise	39 min
Jul 28, 1:45 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 28, 2:26 PM MST	Special Weather Statement	TWC		34 min
Jul 28, 2:35 PM MST	Special Weather Statement	TWC	Graham	40 min
Jul 28, 2:44 PM MST	Severe Thunderstorm Warning	TWC	Pima	31 min
Jul 28, 3:02 PM MST	Special Weather Statement	TWC	Santa Cruz	43 min
Jul 28, 3:08 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 28, 3:11 PM MST	Flash Flood Warning	TWC	Santa Cruz	60 min
Jul 28, 3:15 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 28, 3:29 PM MST	Special Weather Statement	TWC		31 min
Jul 28, 3:33 PM MST	Special Weather Statement	TWC		42 min
Jul 28, 3:54 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 28, 4:23 PM MST	Flash Flood Warning	TWC	Cochise	2 hr
Jul 28, 4:44 PM MST	Special Weather Statement	TWC	Pinal	46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.