Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 13, NWS Flagstaff, AZ

July 13, 2002Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 13, 2002, 3:40 PM MST for Yavapai County, Arizona. It was in force for 35 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: Jul 13, 2002, 3:40 PM MST (22:40 UTC)
Expired: Jul 13, 2002, 4:15 PM MST
In force: 35 min
Issued by: NWS Flagstaff, AZ
Area: Counties, with a storm outline in the text

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 148 km from the middle of the area, began a volume at 22:42 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, 10.7 hours before the alert went out and 108 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: 330 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 1968 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 74 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.

724 
WUUS55 KFGZ 132240
SVRFGZ
AZC025-132315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
338 PM MST SAT JUL 13 2002

THE NATIONAL WEATHER SERVICE HAS EXTENDED THE 

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL YAVAPAI COUNTY IN WEST CENTRAL ARIZONA

* UNTIL 415 PM MST

* AT 338 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER CENTRAL YAVAPAI COUNTY ABOUT 20 MILES
  WEST OF PRESCOTT... OR 12 MILES WEST OF IRON SPRINGS...
  MOVING SOUTHWEST AT 15 MPH.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 58 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 3470 11289 3462 11276 3471 11264 3481 11284

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:10 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	20 min
Jul 13, 3:11 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	19 min
Jul 13, 3:32 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min
Jul 13, 3:43 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	32 min
Jul 13, 4:15 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	30 min
Jul 13, 4:44 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	21 min
Jul 13, 4:51 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2002 Every severe thunderstorm warning in 2002

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.