Alert archive / Arizona / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Flagstaff, AZ

July 22, 2012Gila County, Navajo County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 22, 2012, 7:21 PM MST for Gila County, Navajo County, Arizona. It was in force for 24 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 22, 2012, 7:21 PM MST (02:21 UTC)
Expired
Jul 22, 2012, 7:45 PM MST
In force
24 min
Issued by
NWS Flagstaff, AZ
Area
Storm-based polygon

Counties Gila County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 105 km from the middle of the area, began a volume at 02:21 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 2.4 hours before the alert went out and 195 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, Flgstf/Belemont, AZ at 00:00Z on 2012-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 219 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2012-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
219 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
2014 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
29 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.

869 
WUUS55 KFGZ 230221
SVRFGZ
AZC007-017-230245-
/O.NEW.KFGZ.SV.W.0013.120723T0221Z-120723T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
721 PM MST SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL GILA COUNTY IN EAST CENTRAL ARIZONA...
  SOUTH CENTRAL NAVAJO COUNTY IN NORTHEAST ARIZONA...

* UNTIL 745 PM MST

* AT 717 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CARRIZO...OR 22 MILES SOUTHWEST OF SHOW LOW...AND MOVING WEST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  CARRIZO...
  HIGHWAY 60 FROM MILE POST 310 TO 320...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WARNING IS ISSUED FOR STORMS PRODUCING HAIL 1
INCH DIAMETER OR LARGER...AND/OR WINDS GREATER THAN 57 MPH.

&&

LAT...LON 3395 11047 3413 11039 3398 11009 3385 11015
TIME...MOT...LOC 0219Z 111DEG 17KT 3395 11022

$$
JJ
1 follow-up statement
325 
WWUS55 KFGZ 230246
SVSFGZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
746 PM MST SUN JUL 22 2012

AZC007-017-230255-
/O.EXP.KFGZ.SV.W.0013.000000T0000Z-120723T0245Z/
GILA AZ-NAVAJO AZ-
746 PM MST SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL NAVAJO AND EAST
CENTRAL GILA COUNTIES HAS EXPIRED...

THE STORM THAT PROMPTED THE WARNING NEAR CARRIZO HAS WEAKENED.
HEAVY RAIN IS STILL LIKELY IN CARRIZO THROUGH AROUND 8 PM MST.

LAT...LON 3395 11047 3413 11039 3398 11009 3385 11015
TIME...MOT...LOC 0221Z 111DEG 17KT 3395 11023

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 5:17 PM MSTAreal Flood AdvisoryFGZYavapai88 min
Jul 22, 6:49 PM MSTSpecial Weather StatementFGZ26 min
Jul 23, 1:24 PM MSTAreal Flood AdvisoryFGZYavapai96 min
Jul 23, 3:32 PM MSTAreal Flood AdvisoryFGZYavapai2 hr
Jul 23, 4:00 PM MSTAreal Flood AdvisoryFGZCoconino, Yavapai88 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.