Alert archive / Arizona / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 34, NWS Flagstaff, AZ

September 27, 2014Gila County, Navajo County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Sep 27, 2014, 5:33 PM MST for Gila County, Navajo County, Arizona. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 27, 2014, 5:33 PM MST (00:33 UTC)
Expired: Sep 27, 2014, 6:00 PM MST
In force: 27 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon

Counties Gila County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 58 km from the middle of the area, began a volume at 00:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 27, 10:21 AM MST	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Tuscon, AZ (KDMA), launched 00:00Z, 0.6 hours before the alert went out and 272 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: 169 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 2075 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 27, 3:30 PM MST, 2 hours 3 minutes earlier.

Area forecast discussion, Sep 27, 3:30 PM MST, 2 hours 3 minutes before

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Hazardous weather outlook, Sep 27, 2:46 PM MST, 2 hours 47 minutes before

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In the hours before

Special weather statement, Sep 27, 1:33 PM MST, 4 hours before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 27, 10:40 PM MST	Areal Flood Advisory	FGZ	Coconino	12 hr
Sep 28, 6:34 AM MST	Special Weather Statement	FGZ		11 min
Sep 28, 7:47 AM MST	Areal Flood Advisory	FGZ	Apache	3 hr
Sep 28, 7:59 AM MST	Areal Flood Advisory	FGZ	Apache	3 hr

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.