Alert archive / Arizona / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Tucson, AZ

July 13, 2017Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 13, 2017, 4:56 PM MST for Cochise County, Arizona. It was in force for 49 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 13, 2017, 4:56 PM MST (23:56 UTC)
Expired
Jul 13, 2017, 5:45 PM MST
In force
49 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 51 km from the middle of the area, began a volume at 23:56 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 12:00Z, 11.9 hours before the alert went out and 86 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 12:00Z on 2017-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 677 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 12:00Z on 2017-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
677 J/kg
Mixed-layer CIN
-277 J/kg
Mixed-layer LCL
1612 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

892 
WUUS55 KTWC 132356
SVRTWC
AZC003-140045-
/O.NEW.KTWC.SV.W.0021.170713T2356Z-170714T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
456 PM MST THU JUL 13 2017

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cochise County in southeastern Arizona...

* Until 545 PM MST

* At 454 PM MST, a severe thunderstorm was located 17 miles 
  southeast of Benson, or just northeast of Tombstone, moving 
  southwest at 5 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Tombstone and Fairbank. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is also occurring with this 
storm. Move indoors immediately. Lightning is one of nature's 
leading killers. Remember, if you can hear thunder, you are close 
enough to be struck by lightning.

&&

LAT...LON 3192 11014 3181 10991 3158 11001 3174 11032
TIME...MOT...LOC 2354Z 028DEG 6KT 3181 11006 

HAIL...1.00IN
WIND...60MPH
 
$$

French
2 follow-up statements
539 
WWUS55 KTWC 140022
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
522 PM MST THU JUL 13 2017

AZC003-140045-
/O.CON.KTWC.SV.W.0021.000000T0000Z-170714T0045Z/
Cochise-
522 PM MST THU JUL 13 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR SOUTHWESTERN COCHISE COUNTY...

At 521 PM MST, a severe thunderstorm was just north of Tombstone, 
moving southwest at 5 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Tombstone and Fairbank. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3189 11014 3181 10991 3158 11001 3172 11026
TIME...MOT...LOC 0021Z 028DEG 6KT 3178 11008 

HAIL...<.75IN
WIND...60MPH
 
$$

French
030 
WWUS55 KTWC 140041
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
541 PM MST THU JUL 13 2017

AZC003-140050-
/O.EXP.KTWC.SV.W.0021.000000T0000Z-170714T0045Z/
Cochise-
541 PM MST THU JUL 13 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COCHISE COUNTY
WILL EXPIRE AT 545 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However, heavy 
rain is still possible with this thunderstorm and other severe 
thunderstorms remain in the area.

LAT...LON 3189 11014 3181 10991 3158 11001 3172 11026
TIME...MOT...LOC 0040Z 028DEG 6KT 3175 11010 

$$

French

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 5:15 PM MSTSpecial Weather StatementTWCGraham60 min
Jul 12, 5:20 PM MSTSpecial Weather StatementTWC40 min
Jul 12, 5:31 PM MSTSevere Thunderstorm WarningTWCGraham, Pinal44 min
Jul 12, 5:40 PM MSTAreal Flood AdvisoryTWCGraham, Greenlee50 min
Jul 12, 6:20 PM MSTSpecial Weather StatementTWC40 min
Jul 12, 8:18 PM MSTSpecial Weather StatementTWC42 min
Jul 12, 8:49 PM MSTSpecial Weather StatementTWC41 min
Jul 12, 8:56 PM MSTFlash Flood WarningTWCPima, Pinal2 hr
Jul 12, 9:39 PM MSTAreal Flood AdvisoryTWCPima111 min
Jul 12, 10:19 PM MSTSpecial Weather StatementTWCSanta Cruz41 min
Jul 12, 11:25 PM MSTAreal Flood AdvisoryTWCSanta Cruz2 hr
Jul 13, 1:15 PM MSTAreal Flood AdvisoryTWCCochise, Santa Cruz3 hr
Jul 13, 1:36 PM MSTSpecial Weather StatementTWCGraham39 min
Jul 13, 3:42 PM MSTSpecial Weather StatementTWCSanta Cruz48 min
Jul 13, 3:43 PM MSTSpecial Weather StatementTWC47 min
Jul 13, 3:58 PM MSTBlowing Dust AdvisoryTWCCochise62 min
Jul 13, 4:16 PM MSTSevere Thunderstorm WarningTWCCochise, Pima, Santa Cruz17 min
Jul 13, 4:19 PM MSTSpecial Weather StatementTWCCochise41 min
Jul 13, 4:29 PM MSTAreal Flood AdvisoryTWCPima, Santa Cruz3 hr
Jul 13, 4:42 PM MSTSevere Thunderstorm WarningTWCGraham, Pinal48 min
Jul 13, 4:44 PM MSTSevere Thunderstorm WarningTWCCochise, Pima46 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2017Every severe thunderstorm warning in 2017

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.