Alert archive / Arizona / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 290, NWS Flagstaff, AZ

October 9, 2006Navajo County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Oct 9, 2006, 1:51 PM MDT for 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 counties it named.

The facts

Issued
Oct 9, 2006, 1:51 PM MDT (19:51 UTC)
Expired
Oct 9, 2006, 2:15 PM MDT
In force
24 min
Issued by
NWS Flagstaff, AZ
Area
Counties, with a storm outline in the text

County Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 19:52 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.

IssuedProductOfficeLasted
Oct 9, 9:05 AM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.9 hours before the alert went out and 136 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 12:00Z on 2006-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 112 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2006-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 square meters per square second.193958Sfc1 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
112 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 Oct 9, 10:45 AM MDT, 3 hours 6 minutes earlier.

Area forecast discussion, Oct 9, 10:45 AM MDT, 3 hours 6 minutes before
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Hazardous weather outlook, Oct 9, 10:15 AM MDT, 3 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
915 AM MST MON OCT 9 2006

AZZ004>018-037>040-100700-
WESTERN MOGOLLON RIM-GRAND CANYON COUNTRY-YAVAPAI COUNTY MOUNTAINS-
YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS-
MARBLE AND GLEN CANYONS-KAIBAB PLATEAU-COCONINO PLATEAU-
NORTHEAST PLATEAU AND MESAS HWY 264 NORTHWARD-
NORTHEAST PLATEAU AND MESAS SOUTH OF HWY 264-
CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
BLACK MESA AREA-LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
EASTERN MOGOLLON RIM-WHITE MOUNTAINS-NORTHERN GILA COUNTY-
915 AM MST MON OCT 9 2006

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

.DAY ONE...TODAY

A STORM SYSTEM MOVING ACROSS NORTHERN ARIZONA TODAY WILL PRODUCE
NUMEROUS THUNDERSTORMS OVER NORTHERN GILA COUNTY EASTWARD
THROUGH THE NEW MEXICO BORDER AND NORTHWARD THROUGH THE LITTLE
COLORADO RIVER VALLEY. SOME OF THESE STORMS MAY BECOME SEVERE
WITH LARGE HAIL IN EXCESS OF 3/4 INCH DIAMETER AND STRONG WIND
GUSTS UP TO 70 MPH. A SEVERE THUNDERSTORM WATCH HAS BEEN
ISSUED FOR NORTHERN GILA COUNTY...SOUTHERN NAVAJO COUNTY...AND
SOUTHERN APACHE COUNTY. SEE THE SEVERE THUNDERSTORM
WATCH...AVAILABLE AT WWW.SPC.NOAA.GOV FOR DETAILS. ELSEWHERE IN
NORTHERN ARIZONA...SCATTERED THUNDERSTORMS ARE EXPECTED...PRODUCING
DANGEROUS LIGHTNING...BUT NOT EXPECTED TO PRODUCE SEVERE WIND GUSTS
OR HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANOTHER STORM SYSTEM IS EXPECTED TO MOVE THROUGH ARIZONA
FRIDAY OR SATURDAY...PRODUCING MORE CHANCES FOR SHOWERS
AND THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

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

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 8, 11:03 PM MDTFlash Flood WarningFGZCoconino
Oct 9, 1:25 PM MDTSevere Thunderstorm WarningFGZGila35 min
Oct 9, 2:12 PM MDTSevere Thunderstorm WarningFGZNavajo33 min
Oct 9, 5:09 PM MDTFlash Flood WarningFGZCoconino

Nearby

Severe Thunderstorm Warnings in Arizona, 2006Every severe thunderstorm warning in 2006

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.