Alert archive / Arizona / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 65, NWS Flagstaff, AZ

August 29, 1996Coconino County, Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 29, 1996, 3:11 PM MST for Coconino County, Yavapai County, Arizona. It was in force for 34 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
Aug 29, 1996, 3:11 PM MST (22:11 UTC)
Expired
Aug 29, 1996, 3:45 PM MST
In force
34 min
Issued by
NWS Flagstaff, AZ
Area
Whole counties

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 22:13 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, 10.2 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-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 1996-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 609 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 1996-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
609 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1655 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Aug 29, 2:02 PM MST, 1 hour 9 minutes earlier.

Area forecast discussion, Aug 29, 2:02 PM MST, 1 hour 9 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
200 PM MST THU AUG 29 1996

5H RIDGE AXIS TO SWING OVER CWA NEXT FEW DAYS.  SOME DRYING MID TO
UPPER LEVELS TO OCCUR...MAINLY OVER THE NORTHERN PORTIONS.  DECENT
DP VALUES SHOWING UP IN LITTLE CO VALLEY AS WELL AS OVER YAVAPAI
CNTY AT THIS TIME.  EXPECT DECENT ACT TO DEVELOP LATER ON THIS AFT
IN THIS AFT AND EVENING WITH STORMS PROPAGATING SOUTHWARD INTO THE
VALLEYS...WHERE GREATEST MOISTURE LIES. KEEPING POPS UP THIS
EVENING ZNS 7 13.  IN EXTENDED SLOWLY DRYING THINGS OFF N TO S AS
DRYER AIR WORKS IN. FOR TEMPS MAKING SOME MINOR ADJUSTMENTS TO NGM
MOS.

MCGRATH

In the hours before

Special weather statement, Aug 29, 1:11 PM MST, 2 hours before
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Special weather statement, Aug 29, 2:12 PM MST, 59 minutes before
AZZ007-292315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
210 PM MST THU AUG 29 1996

...STRONG THUNDERSTORMS IN CENTRAL YAVAPAI COUNTY...

AT 210 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS OVER CENTRAL YAVAPAI COUNTY. THE STRONGEST
STORM WAS OVER PRESCOTT VALLEY MOVING SOUTHWEST AT 10 MILES AN
HOUR AND WILL AFFECT PRESCOTT VALLEY THROUGH 230 PM AND PRESCOTT
BY 245 PM. A SKYWARN WEATHER SPOTTER IN PRESCOTT VALLEY REPORTED
1/2 INCH HAIL WITH THIS STORM AT 210 PM.

IF YOU ARE OUTDOORS AND A STORM APPROACHES...MOVE TO A PLACE OF
SHELTER IMMEDIATELY.  MOTORISTS SHOULD REMAIN ALERT FOR STREET
FLOODING AND REDUCED VISIBILITIES IN HEAVY RAIN.

SIGLER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 3:00 PM MSTSevere Thunderstorm WarningFGZGila45 min
Aug 29, 3:18 PM MSTSevere Thunderstorm WarningFGZYavapai57 min
Aug 29, 3:19 PM MSTSevere Thunderstorm WarningFGZYavapai56 min
Aug 29, 3:30 PM MSTSevere Thunderstorm WarningFGZYavapai45 min
Aug 29, 3:47 PM MSTSevere Thunderstorm WarningFGZYavapai63 min
Aug 29, 4:16 PM MSTSevere Thunderstorm WarningFGZYavapai29 min
Aug 29, 4:45 PM MSTSevere Thunderstorm WarningFGZGila30 min

Nearby

Severe Thunderstorm Warnings in Arizona, 1996Every severe thunderstorm warning in 1996

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.