Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 21, NWS Flagstaff, AZ

July 31, 2000Gila County, Navajo County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 31, 2000, 4:31 PM MST for Gila County, Navajo County, Arizona. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 31, 2000, 4:31 PM MST (23:31 UTC)
Expired: Jul 31, 2000, 5:30 PM MST
In force: 59 min
Issued by: NWS Flagstaff, AZ
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Gila County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 64 km from the middle of the area, began a volume at 23:33 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

Phoenix, AZ (KPSR), launched 12:00Z, 11.5 hours before the alert went out and 132 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: 4 J/kg
Mixed-layer CIN: -541 J/kg
Mixed-layer LCL: 2590 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 17 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.

000 
WUUS55 KFGZ 312334
SVRFLG
AZC007-017-010030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
431 PM MST MON JUL 31 2000

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL GILA COUNTY IN ARIZONA
  EXTREME SOUTHWESTERN NAVAJO COUNTY IN ARIZONA

* UNTIL 530 PM MST

* AT 431 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM 5 MILES NORTHEAST OF CIBECUE... OR 20 MILES 
SOUTHWEST OF SHOW LOW...MOVING WEST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  YOUNG AT 505 PM MST

LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE WITH THIS SEVERE 
THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN 
A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER.

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

LAT...LON 3403 11051 3416 11049 3428 11121 3404 11124

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 3:05 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	30 min
Jul 31, 3:26 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	49 min
Jul 31, 4:07 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	33 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2000 Every severe thunderstorm warning in 2000

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.