Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 18, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 21, 2000, 4:34 PM MST for Gila County, Arizona. It was in force for 46 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
- Jul 21, 2000, 4:34 PM MST (23:34 UTC)
- Expired
- Jul 21, 2000, 5:20 PM MST
- In force
- 46 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Gila County, AZ
The radar
The Flagstaff radar (KFSX), 93 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
Tuscon, AZ (KTUS), launched 12:00Z, 11.6 hours before the alert went out and 181 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.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -487 J/kg
- Mixed-layer LCL
- 3081 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
239 WUUS55 KPSR 212333 SVRPHX AZC007-220020- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 434 PM MST FRI JUL 21 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN GILA COUNTY IN CENTRAL ARIZONA * UNTIL 520 PM MST * AT 430 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHEAST OF SAN CARLOS... MOVING SOUTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... OPEN COUNTRY EAST OF HIGHWAY 77 AND NORTHEAST OF SAN CARLOS DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS CB
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 Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 3:15 PM MST, 1 hour 19 minutes earlier.
Area forecast discussion, Jul 21, 3:15 PM MST, 1 hour 19 minutes before
AZZ020>028-CAZ030>033-220545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 315 PM MST FRI JUL 21 2000 .SYNOPSIS... MONSOON MOISTURE HAS RETURNED TO MUCH OF THE DESERT SOUTHWEST...FOR MORE HUMID CONDITIONS. THIS WILL BRING A THREAT OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS...TO SOUTH-CENTRAL AND SOUTHWEST ARIZONA THE NEXT SEVERAL DAYS. STRONG HIGH PRESSURE WILL ALSO BE IN PLACE OVER THE SOUTHWEST FOR TEMPERATURES AT OR ABOVE NORMAL. .DISCUSSION... STORM ACTIVITY A LITTLE SLOW TO DEVELOP EXCEPT OVER THE RIM AND WHITE MOUNTAINS...STRONG CAP TO OVERCOME. WITH SIGNIFICANT MOISTURE/CAPE IN PLACE...STORM THREAT REMAINS FOR TONIGHT FROM LATE-DEVELOPING STORMS. SURGE CONTINUES AND EXPECT THAT MOISTURE ADVECTION WILL BE PLENTIFUL ENOUGH FOR AT LEAST NEXT 2 DAYS FOR STORM ACTIVITY. NOT CERTAIN ABOUT HOW WIDESPREAD THE ACTIVITY WILL BE...THUS CONSERVATIVE WORDING IN THE ZONES. THE GENERAL IDEA IS THAT THE MONSOON HAS RETURNED. ETA/NGM HAS MUCH BETTER HANDLE ON MOISTURE FIELDS THAN AVN. THE 500 MB HIGH HANGS AROUND OVER ARIZONA AND NEW MEXICO INTO WEDNESDAY...WITH SOUTHWESTERLY FLOW TRYING TO NUDGE IN TUESDAY NIGHT AND WEDNESDAY. INTRODUCED CHANCE WORDING IN THE EXTENDED FOR MOST OF THE ARIZONA ZONES BECAUSE OF MOISTURE TRENDS AND LACK OF DISTINCT DRYING FLOW. JAMISON
In the hours before
Special weather statement, Jul 21, 1:31 PM MST, 3 hours 3 minutes before
AZZ021>024-026>028-220130- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 131 PM MST FRI JUL 21 2000 ...SLIGHT RISK FOR SEVERE THUNDERSTORMS AND BLOWING DUST OVER MUCH OF SOUTHWEST AND SOUTH-CENTRAL ARIZONA THIS EVENING AND TONIGHT... THE SLIGHT RISK AREA INCLUDES THE FOLLOWING COUNTIES...MARICOPA... NORTHERN PINAL...CENTRAL AND EASTERN LA PAZ AND YUMA...AND SOUTHERN GILA. CITIES AND RECREATIONAL AREAS THAT MAY BE AFFECTED INCLUDE THE GREATER PHOENIX METROPOLITAN AREA...WICKENBURG...LAKE PLEASANT... THE APACHE TRAIL...GILA BEND...CASA GRANDE...FLORENCE...COOLIDGE... GLOBE...AND MIAMI. SEVERE THUNDERSTORMS ARE POSSIBLE IN THE SLIGHT RISK AREA THIS EVENING. STORMS ARE MOST LIKELY OVER THE SOUTH CENTRAL DESERT... INCLUDING THE GREATER PHOENIX METROPOLITAN AREA...BETWEEN 5 AND 10 PM...AND OVER CENTRAL AND EASTERN LA PAZ AND YUMA COUNTIES BETWEEN 7 AND 11 PM. THE GREATEST THREATS FROM THESE STORMS WILL BE DAMAGING WIND AND BLOWING DUST WHICH REDUCES VISIBILITIES TO LESS THAN 1/4 MILE. LOCALLY HEAVY RAIN COULD RESULT IN RUNNING WASHES AND FLOODING OF ROADWAYS. STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY. DG
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every 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.