Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 101, NWS Tucson, AZ

September 3, 2012Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Sep 3, 2012, 6:17 PM MST for Cochise County, Arizona. It was in force for 43 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: Sep 3, 2012, 6:17 PM MST (01:17 UTC)
Expired: Sep 3, 2012, 7:00 PM MST
In force: 43 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 38 km from the middle of the area, began a volume at 01:21 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, 1.3 hours before the alert went out and 71 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: 768 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2007 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 15 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.

512 
WUUS55 KTWC 040117
SVRTWC
AZC003-040200-
/O.NEW.KTWC.SV.W.0101.120904T0117Z-120904T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
617 PM MST MON SEP 3 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL COCHISE COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 700 PM MST

* AT 612 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
  AREA OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED NEAR AND SOUTH OF
  INTERSTATE 10 EAST OF BENSON...AND MOVING WEST AND SOUTHWEST AT 15
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ST.
  DAVID...MESCAL...KARTCHNER CAVERNS STATE PARK AND WHETSTONE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3167 11037 3202 11044 3215 11007 3189 10989
TIME...MOT...LOC 0115Z 059DEG 12KT 3190 11019

$$

MEYER

2 follow-up statements

585 
WWUS55 KTWC 040142
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
642 PM MST MON SEP 3 2012

AZC003-040200-
/O.CON.KTWC.SV.W.0101.000000T0000Z-120904T0200Z/
COCHISE AZ-
642 PM MST MON SEP 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR WEST CENTRAL COCHISE COUNTY...

AT 636 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING 
WINDS IN EXCESS OF 60 MPH.  THESE STORMS EXTENDED FROM NEAR BENSON 
AND ST. DAVID TO THE EAST AND NORTHEAST...NEAR AND SOUTH OF 
INTERSTATE 10. MOVEMENT WAS TO THE SOUTHWEST AT 15 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3167 11037 3202 11044 3215 11007 3189 10989
TIME...MOT...LOC 0141Z 063DEG 12KT 3191 11027

$$

MEYER

607 
WWUS55 KTWC 040201
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
701 PM MST MON SEP 3 2012

AZC003-040210-
/O.EXP.KTWC.SV.W.0101.000000T0000Z-120904T0200Z/
COCHISE AZ-
701 PM MST MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL COCHISE COUNTY
HAS EXPIRED...

AT 700 PM MST THUNDERSTORMS IN WEST CENTRAL COCHISE COUNTY WERE 
STILL CAPABLE OF GENERATING WIND GUSTS TO 40 MPH BUT NO LONGER 
APPEARED TO AT SEVERE LEVELS. EXPECT HEAVY RAIN TO CONTINUE...A 
FLASH FLOOD WARNING REMAINS IN EFFECT.

LAT...LON 3167 11037 3202 11044 3215 11007 3189 10989
TIME...MOT...LOC 0142Z 063DEG 12KT 3191 11027

$$

MEYER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 5:03 PM MST	Special Weather Statement	TWC	Cochise	42 min
Sep 3, 5:19 PM MST	Severe Thunderstorm Warning	TWC	Cochise	41 min
Sep 3, 5:21 PM MST	Flash Flood Warning	TWC	Cochise	114 min
Sep 3, 5:34 PM MST	Special Weather Statement	TWC	Santa Cruz	41 min
Sep 3, 6:39 PM MST	Special Weather Statement	TWC	Graham	51 min
Sep 3, 6:41 PM MST	Flash Flood Warning	TWC	Cochise	79 min
Sep 3, 8:39 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Sep 4, 6:24 AM MST	Areal Flood Advisory	TWC	Pima	111 min
Sep 4, 7:56 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Sep 4, 4:09 PM MST	Special Weather Statement	TWC	Graham	51 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.