Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Flagstaff, AZ

July 14, 2002Apache County, Navajo County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 14, 2002, 2:35 PM MST for Apache County, Navajo County, Arizona. It was in force for 25 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 14, 2002, 2:35 PM MST (21:35 UTC)
Expired: Jul 14, 2002, 3:00 PM MST
In force: 25 min
Issued by: NWS Flagstaff, AZ
Area: Counties, with a storm outline in the text

Counties Apache County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 21:37 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, 9.6 hours before the alert went out and 202 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: 65 J/kg
Mixed-layer CIN: -356 J/kg
Mixed-layer LCL: 2841 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

033 
WUUS55 KFGZ 142135
SVRFGZ
AZC001-017-142200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
233 PM MST SUN JUL 14 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN APACHE COUNTY IN NORTHEAST ARIZONA
  SOUTHEASTERN NAVAJO COUNTY IN NORTHEAST ARIZONA

* UNTIL 300 PM MST

* AT 233 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER EXTREME SOUTHEASTERN NAVAJO COUNTY...
  ABOUT 9 MILES EAST OF SHOW LOW...MOVING SOUTHEAST AT 12 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT HIGHWAY 60 FROM SHOW LOW TO    
  VERNON THROUGH 250 PM MST

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 3420 11004 3417 10978 3426 10980 3442 11000

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 5:18 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	27 min
Jul 13, 5:48 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	27 min
Jul 14, 1:14 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	31 min
Jul 14, 2:54 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	36 min
Jul 14, 3:16 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	29 min
Jul 14, 3:34 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	41 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.