Alert archive / Arizona / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS Flagstaff, AZ

August 26, 2014Coconino County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 26, 2014, 11:39 AM MST for Coconino County, Arizona. It was in force for 36 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: Aug 26, 2014, 11:39 AM MST (18:39 UTC)
Expired: Aug 26, 2014, 12:15 PM MST
In force: 36 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon

County Coconino County, AZ

The radar

The Cedar City radar (KICX), 136 km from the middle of the area, began a volume at 18:39 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 12:00Z, 6.7 hours before the alert went out and 148 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: 216 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 973 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: -23 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.

612 
WUUS55 KFGZ 261839
SVRFGZ
AZC005-261915-
/O.NEW.KFGZ.SV.W.0021.140826T1839Z-140826T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1139 AM MST TUE AUG 26 2014

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA...

* UNTIL 1215 PM MST

* AT 1135 AM 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 JUST
  NORTH OF SUPAI NEAR THE COLORADO RIVER...AND MOVING NORTHEAST AT
  35 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS THUNDERSTORM IS ALSO PRODUCING HEAVY RAINFALL. THIS RAINFALL
WILL LEAD TO RAPID RISES ON AREA STREAMS AND CREEKS.

&&

LAT...LON 3656 11244 3638 11232 3619 11273 3628 11281
      3633 11275 3633 11274 3636 11271 3635 11267
      3640 11264 3645 11265
TIME...MOT...LOC 1838Z 237DEG 32KT 3631 11270

$$
JJ

1 follow-up statement

651 
WWUS55 KFGZ 261914
SVSFGZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1214 PM MST TUE AUG 26 2014

AZC005-261924-
/O.EXP.KFGZ.SV.W.0021.000000T0000Z-140826T1915Z/
COCONINO AZ-
1214 PM MST TUE AUG 26 2014

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL COCONINO COUNTY
WILL EXPIRE AT 1215 PM MST...

THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED.
THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.


LAT...LON 3656 11244 3638 11232 3619 11273 3628 11281
      3633 11275 3633 11274 3636 11271 3635 11267
      3640 11264 3645 11265
TIME...MOT...LOC 1914Z 237DEG 32KT 3646 11235

$$
JJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 6:50 PM MST	Areal Flood Advisory	FGZ	Yavapai	115 min
Aug 26, 11:29 AM MST	Special Weather Statement	FGZ		31 min
Aug 26, 12:03 PM MST	Areal Flood Advisory	FGZ	Yavapai	117 min
Aug 26, 12:28 PM MST	Special Weather Statement	FGZ	Coconino	47 min
Aug 26, 12:32 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	43 min
Aug 26, 1:06 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 26, 1:20 PM MST	Special Weather Statement	FGZ		25 min
Aug 26, 1:36 PM MST	Areal Flood Advisory	FGZ	Yavapai	114 min
Aug 26, 1:39 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 26, 1:59 PM MST	Special Weather Statement	FGZ		31 min
Aug 26, 3:20 PM MST	Special Weather Statement	FGZ	Navajo	55 min
Aug 26, 3:45 PM MST	Special Weather Statement	FGZ		30 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2014 Every severe thunderstorm warning in 2014

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.