Alert archive / Arizona / Special Weather Statements in 2015

Special Weather Statement, NWS Flagstaff, AZ

August 8, 2015Navajo County, Arizona

NWS Flagstaff, AZ issued this special weather statement at Aug 8, 2015, 8:18 PM MDT for Navajo County, Arizona. It was in force for 42 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 8, 2015, 8:18 PM MDT (02:18 UTC)
Expired: Aug 8, 2015, 9:00 PM MDT
In force: 42 min
Issued by: NWS Flagstaff, AZ

County Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 74 km from the middle of the area, began a volume at 02:19 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 00:00Z, 2.3 hours before the alert went out and 330 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 0 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 54 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 8, 4:46 PM MDT, 3 hours 32 minutes earlier.

Area forecast discussion, Aug 8, 4:46 PM MDT, 3 hours 32 minutes before

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Hazardous weather outlook, Aug 8, 2:27 PM MDT, 5 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
127 PM MST SAT AUG 8 2015

AZZ004>007-009>016-038>040-090445-
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-
CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-
OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
127 PM MST SAT AUG 8 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTHERN
ARIZONA. A FEW OF THESE THUNDERSTORMS MAY BECOME SEVERE WITH LARGE
HAIL OR STRONG WINDS. HEAVY RAIN WITH SUCCESSIVE STORMS WILL
ELEVATE THE THREAT FOR LOCALIZED FLASH FLOODING. THE GREATEST
CHANCES FOR SEVERE WEATHER WILL BE FROM THE MOGOLLON RIM
NORTHWARD.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SUNDAY...NO SIGNIFICANT THREATS.

MONDAY THROUGH THURSDAY...SHOWERS AND THUNDERSTORMS WILL RETURN.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
TO LOCAL LAW ENFORCEMENT...OR THE NATIONAL WEATHER SERVICE BY
CALLING 1-888-745-1637.

In the hours before

Local storm report, Aug 8, 4:03 PM MDT, 4 hours 15 minutes before

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Special weather statement, Aug 8, 4:29 PM MDT, 3 hours 49 minutes before

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Special weather statement, Aug 8, 5:17 PM MDT, 3 hours 1 minute before

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Special weather statement, Aug 8, 5:49 PM MDT, 2 hours 29 minutes before

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Special weather statement, Aug 8, 7:35 PM MDT, 43 minutes before

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Special weather statement, Aug 8, 8:18 PM MDT, 0 minutes 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
Aug 8, 7:35 PM MDT	Special Weather Statement	FGZ	Navajo	40 min
Aug 9, 12:26 PM MDT	Areal Flood Advisory	FGZ	Yavapai	2 hr
Aug 9, 1:26 PM MDT	Special Weather Statement	FGZ	Yavapai	34 min
Aug 9, 1:58 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	47 min
Aug 9, 3:05 PM MDT	Special Weather Statement	FGZ	Coconino	25 min
Aug 9, 3:10 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	50 min
Aug 9, 3:22 PM MDT	Tornado Warning	FGZ	Coconino	23 min
Aug 9, 3:39 PM MDT	Special Weather Statement	FGZ		36 min
Aug 9, 3:42 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	33 min
Aug 9, 4:00 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	21 min
Aug 9, 4:29 PM MDT	Flash Flood Warning	FGZ	Coconino	3 hr

Nearby

Special Weather Statements in Arizona, 2015 Every special weather statement in 2015

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.