Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 53, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 30, 2000, 2:03 PM MST for Pinal County, Arizona. It was in force for 62 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 30, 2000, 2:03 PM MST (21:03 UTC)
- Expired
- Aug 30, 2000, 3:05 PM MST
- In force
- 62 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 21:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 30, 2:27 PM MST | Thunderstorm Wind 60 E | Apache Jct, AZ | Near zero visibility due to dense blowing dust accompanied the strong winds. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 30, 11:30 AM MST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 9.1 hours before the alert went out and 82 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
- 504 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KPSR 302102 SVRPHX AZC021-302205- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 203 PM MST WED AUG 30 2000 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN AND NORTH CENTRAL PINAL COUNTY IN CENTRAL ARIZONA * UNTIL 305 PM MST. * AT 200 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHWEST OF CASA GRANDE...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT... ARIZONA CITY CASA GRANDE COOLIDGE DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! $$ MB U
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 Aug 30, 9:55 AM MST, 4 hours 8 minutes earlier.
Area forecast discussion, Aug 30, 9:55 AM MST, 4 hours 8 minutes before
AZZ020>028-CAZ030>033-302245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 955 AM MST WED AUG 30 2000 .SYNOPSIS... THE AIRMASS OVER SOUTHEAST CALIFORNIA AND ARIZONA WILL CONTINUE MOIST AND UNSTABLE WITH A CHANCE OF SHOWERS AND THUNDERSTORMS TODAY THROUGH THURSDAY EVENING. ENHANCING THE THREAT FOR STRONG THUNDERSTORMS THIS AFTERNOON WILL BE A STRONG UPPER LEVEL DISTURBANCE MOVING UP INTO THE STATE FROM MEXICO THIS AFTERNOON. MEANWHILE...A PACIFIC LOW PRESSURE SYSTEM WILL MOVE INLAND AND BRING MUCH DRIER AIR FROM THE PACIFIC OVER SOUTHEAST CALIFORNIA AND ARIZONA BY THIS HOLIDAY WEEKEND. .DISCUSSION... LOTS OF PARAMETERS SEEM TO BE COMING TOGETHER TODAY FOR A VERY ACTIVE CONVECTIVE DAY FOR MUCH OF CWFA. FIRST OFF...SOUNDINGS TODAY AT BOTH TUS AND PSR SHOWING GOOD SHEAR AND DRY PUNCH IN THE MID LEVELS... INDICATIVE OF THE POSSIBILITY OF LONG-LIVED MULTICELLS WITH WET MICROBURST POTENTIAL .AND...LARGE HAIL IS ALSO A POSSIBILITY AS AFTERNON CAPES APPROACH 2000 J/KG AND WBZ HEIGHTS NOT ALL THAT HIGH. SERVING AS A TRIGGERING MECHANISM WILL BE THE UNSEASONABLY STRONG VORT MAX APPROACHING SRN BORDER BETWEEN OLS AND DUG BEST SEEN ON WV IMAGERY. IF SYSTEM CONTINUES ITS PRESENT MOVEMENT...BEST DYNAMICS WOULD BE OVER ERN CWFA AND TUS AREA. HOWEVER...DIFFLUENCE ALOFT OVER JUST ABOUT ALL OF SW/SCNTRL AZ WILL PROBABLY LEAD TO VERY TALL... POSSIBLY SEVERE CONVECTION. CONVECTIVE TEMPS ONLY IN THE MID TO UPPER 80S WILL ALSO MEAN EARLIER THAN NORMAL CONVECTIVE DEVELOPMENT. SPC OUTLOOK FOR TODAY LOOKS GOOD AND MAY DEFINITELY NEED A SVR WATCH BY LATE MORNING/ERLY AFTERNOON. 12Z MODELS MOVE THE ABOVE MENTIONED VORT MAX NEWD OUT OF PICTURE BY THIS EVENING...BUT MOISTURE REMAINS IN LOWER LEVELS THROUGH THURSDAY AND EVEN INTO FRI. MAY BE SOME WEAK DYNAMICS TOMORROW...SO CANT RULE OUT ISOLD THUNDERSTORMS BY THEN. HOWEVER...IF TODAY IS REAL ACTIVE...IT MAY BE TOO STABLE FOR GOOD WIDESPREAD CONVECTION TO GET GOING. CURRENT FORECASTS HAVE A GOOD HANDLE ON THE ABOVE...THOUGH WILL PROBABLY UPDATE TO GO WITH AREAL COVERAGE TERMS RATHER THAN CHANCE FOR SOME ZONES...AND MENTION POSSIBILITY OF HAI$L AND STRONG WINDS...ESPECIALLY CNTRL/ERN PORTIONS OF CWFA. DRYING FOR THE HOLIDAY WEEKEND STILL ON TRACK. UPDATES OUT SHORTLY...ALONG WITH A HAZARDOUS WEATHER OUTLOOK. ESTLE
In the hours before
Special weather statement, Aug 30, 10:20 AM MST, 3 hours 43 minutes before
AZZ022>024-027-028-310130-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1020 AM MST WED AUG 30 2000
...MODERATE RISK OF HAZARDOUS WEATHER OVER SOUTH CENTRAL ARIZONA
THIS AFTERNOON AND EARLY EVENING...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...SOUTHERN GILA AND NORTHWEST PINAL.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
THUNDERSTORM WIND GUSTS OF GREATER THAN 60 MPH ALONG WITH
LARGE HAIL.
ADDITIONAL THREATS INCLUDE:
HEAVY RAINFALL OF OVER ONE INCH PER HOUR MAY CAUSE FLOODED
HIGHWAY LOW SPOTS AND URBAN INTERSECTIONS.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY.
ESTLEThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 3:28 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 62 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.