Alert archive / Arizona / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 27, NWS Flagstaff, AZ

June 30, 2015Coconino County, Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jun 30, 2015, 4:29 PM MST for Coconino County, Yavapai County, Arizona. It was in force for 32 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: Jun 30, 2015, 4:29 PM MST (23:29 UTC)
Expired: Jun 30, 2015, 5:01 PM MST
In force: 32 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon

Counties Coconino County, AZ, Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 113 km from the middle of the area, began a volume at 23:31 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, 11.5 hours before the alert went out and 33 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: 212 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 2208 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 Jun 30, 3:51 PM MST, 38 minutes earlier.

Area forecast discussion, Jun 30, 3:51 PM MST, 38 minutes before

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Hazardous weather outlook, Jun 30, 3:23 AM MST, 13 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
323 AM MST TUE JUN 30 2015

AZZ004>018-037>040-010230-
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
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-WHITE MOUNTAINS-
NORTHERN GILA COUNTY-YAVAPAI COUNTY VALLEYS AND BASINS-
OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
323 AM MST TUE JUN 30 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...
NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN
ARIZONA.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL FORM OVER THE MOUNTAINS BY EARLY
AFTERNOON AND THEN MOVE WEST TO SOUTHWEST INTO THE VALLEYS.
STORMS WILL BE MOST NUMEROUS FROM THE MOGOLLON RIM SOUTHWARD. A
FEW STORMS THAT MOVE ACROSS YAVAPAI AND GILA COUNTIES COULD BECOME
SEVERE FROM MID AFTERNOON INTO THE EVENING HOURS WITH WIND GUSTS
IN EXCESS OF 60 MPH. AS USUAL, CLOUD TO GROUND LIGHTNING, HEAVY
RAIN AND HAIL WILL BE POSSIBLE WITH ANY STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MONSOONAL FLOW WILL REMAIN OVER NORTHERN ARIZONA WITH A CHANCE OF
SHOWERS AND THUNDERSTORMS EACH DAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jun 30, 10:38 AM MST, 5 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1038 AM MST TUE JUN 30 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0930 PM     TSTM WND DMG     10 SE CONGRESS          34.06N 112.73W
06/29/2015                   YAVAPAI            AZ   TRAINED SPOTTER

            ROOF OF HOUSE BLOWN OFF... BARN ROOF SEPARATED FROM
            STRUCTURE... ONE TREE DOWN...ONE LARGE SAGUARO CACTUS
            DOWN... SEVEN TRUCK LOADS OF DOWNED TREE BRANCHES.

&&

EVENT NUMBER FGZ1500067

DGV

Local storm report, Jun 30, 12:11 PM MST, 4 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1211 PM MST TUE JUN 30 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0720 PM     TSTM WND DMG     10 SE CONGRESS          34.06N 112.73W
06/29/2015                   YAVAPAI            AZ   TRAINED SPOTTER

            ROOF OF HOUSE BLOWN OFF... BARN ROOF SEPARATED FROM
            STRUCTURE... ONE TREE DOWN...ONE LARGE SAGUARO CACTUS
            DOWN... SEVEN TRUCK LOADS OF DOWNED TREE BRANCHES.

&&

CORRECTED EVENT TIME

EVENT NUMBER FGZ1500067

DGV

Special weather statement, Jun 30, 1:57 PM MST, 2 hours 32 minutes before

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Local storm report, Jun 30, 3:38 PM MST, 51 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
Jun 29, 5:20 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	25 min
Jun 29, 5:34 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	26 min
Jun 29, 6:59 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	31 min
Jun 29, 7:30 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	30 min
Jun 30, 12:33 PM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Jun 30, 1:02 PM MST	Flash Flood Warning	FGZ	Apache	88 min
Jun 30, 1:03 PM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Jun 30, 1:57 PM MST	Special Weather Statement	FGZ		48 min
Jun 30, 3:14 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	31 min
Jun 30, 3:36 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Navajo	24 min
Jun 30, 3:40 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Jun 30, 4:02 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	28 min
Jun 30, 4:06 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	24 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2015 Every severe thunderstorm warning 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.