Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 19, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 21, 2000, 7:41 PM MST for Maricopa 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 counties it named.
The facts
- Issued
- Jul 21, 2000, 7:41 PM MST (02:41 UTC)
- Expired
- Jul 21, 2000, 8:40 PM MST
- In force
- 59 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 2.7 hours before the alert went out and 49 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
- 676 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 2929 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
285 WUUS55 KPSR 220241 SVRPHX AZC013-220340- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 741 PM MST FRI JUL 21 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 840 PM MST. * AT 735 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHEAST OF CAREFREE... MOVING SOUTH TO SOUTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... HORSESHOE AND BARTLETT RESERVOIRS... THE AREA BETWEEN CAREFREE AND SUNFLOWER. 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, 4 hours 26 minutes earlier.
Area forecast discussion, Jul 21, 3:15 PM MST, 4 hours 26 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
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 9:55 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 45 min |
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.