Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 42, NWS Phoenix, AZ

August 14, 2000Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 14, 2000, 5:08 PM MST for Pinal County, Arizona. It was in force for 47 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 14, 2000, 5:08 PM MST (00:08 UTC)
Expired
Aug 14, 2000, 5:55 PM MST
In force
47 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Pinal County, AZ

What was reported inside it

TimeReportWhereRemark
Aug 14, 5:35 PM MSTThunderstorm Wind 60 EKelvin, AZThunderstorm winds blew down power poles in Kelvin.

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 nearest sounding before it

Phoenix, AZ (KPSR), launched 00:00Z, 0.1 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.

Skew-T log-pSkew-T log-p diagram, Phoenix, AZ at 00:00Z on 2000-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 351 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phoenix, AZ at 00:00Z on 2000-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
351 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
3076 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
34 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 KPSR 150007
SVRPHX
AZC021-150055-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
508 PM MST MON AUG 14 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL PINAL COUNTY IN CENTRAL ARIZONA

* UNTIL 555 PM MST

* AT 505 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTH OF SUPERIOR... MOVING WEST AT 15
  MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  SUPERIOR
  FLORENCE JUNCTION
  HIGHWAY 177 SOUTH OF SUPERIOR
  HIGHWAY 79 SOUTH OF FLORENCE JUNCTION
  HIGHWAY 60 WEST OF SUPERIOR

DAMAGING WINDS AND HEAVY RAIN ARE LIKEgLY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

DS/MH

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 14, 2:55 PM MST, 2 hours 13 minutes earlier.

Area forecast discussion, Aug 14, 2:55 PM MST, 2 hours 13 minutes before
AZZ020>028-CAZ030>033-150545-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
255 PM MST MON AUG 14 2000

.SYNOPSIS...
HIGH PRESSURE CENTERED WILL MOVE WEST OVER NEW MEXICO TONIGHT AND
TUESDAY...AND ARIZONA WEDNESDAY. THIS WILL CONTINUE A FLOW OF MOIST
AND UNSTABLE AIR FROM THE SOUTHEAST AND EAST...WITH A CHANCE OF
MAINLY LATE AFTERNOON AND EVENING THUNDERSTORMS AND DESERT DUST
STORMS...MOSTLY IN ARIZONA. DRIER AIR ALOFT IS EXPECTED TO MOVE INTO
SOUTHEAST CALIFORNIA FOR MOSTLY CLEAR SKIES THERE DURING THE END OF
THE WEEK.

.DISCUSSION...
WITH HIGH PRESSURE CURRENTLY TO OUR EAST...SOMETIMES HARD TO DETECT
...OR PINPOINT EXACT LOCATION OF...LOW PRESSURE SYSTEMS ARE MOVING
INTO THE REGION IN A FLOW ALOFT FROM THE SOUTHEAST. ONE SUCH SYSTEM
RESULTED IN THUNDERSTORMS OVER MOHAVE COUNTY EARLY THIS MORNING. IT
LOOKS AS IF ANOTHER SUCH SYSTEM...FROM NORTHERN MEXICO AND SOUTHWEST
NEW MEXICO...WILL ENHANCE THUNDERSTORMS AT LEAST OVER SOUTH-CENTRAL
AND PROBABLY SOUTHWEST ARIZONA LATE THIS AFTERNOON AND TONIGHT. WITH
THE STEERING FLOW FROM THE SOUTHEAST...WOULD EXPECT ANOTHER GOOD DUST
STORM WITH POOR VISIBILITY MOVING UP THE CORRIDOR BETWEEN TUCSON AND
PHOENIX. THIS HAS BEEN COVERED IN THE HAZARDOUS WEATHER OUTLOOK
THROUGH THIS EVENING. THIS SYSTEM WILL CONTINUE WEST OVER SOUTHWEST
ARIZONA TUESDAY AND SOUTHEAST CALIFORNIA TUESDAY NIGHT FOR POSSIBLE
ENHANCEMENT OF THUNDERSTORMS IN THERE. IN THE EXTENDED FORECAST
PERIOD ...THURSDAY THROUGH SATURDAY...THE HIGH PRESSURE AXIS SHIFTS
TO A POSITION EXTENDING FROM NORTHERN BAJA TO THE 4 CORNERS AREA OR
SOUTHEAST OF THERE. THIS BRINGS A DRIER FLOW OF AIR FROM THE
SOUTHWEST AT LEAST OVER SOUTHEAST CALIFORNIA AND THE LOWER COLORADO
RIVER VALLEY...SO AM ONLY MENTIONING THE CHANCE OF THUNDERSTORMS EAST
OF THERE IN ARIZONA DURING THE LATTER PART OF THIS WEEK.

ELLIS

In the hours before

Special weather statement, Aug 14, 1:47 PM MST, 3 hours 21 minutes before
AZZ020>028-CAZ031-150130-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
148 PM MST (148 PM PDT) MON AUG 14 2000

...SLIGHT RISK OF DUST STORMS WITH VISIBILITY LESS THAN A QUARTER
OF A MILE IN SOUTH-CENTRAL AND SOUTHWEST ARIZONA INTO THIS EVENING...

ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER SOUTH-CENTRAL
AND SOUTHWEST ARIZONA INTO THIS EVENING. AT ANY GIVEN LOCATION...
THERE IS A SLIGHT RISK THAT THUNDERSTORM OUTFLOW WILL PRODUCE A
DUST STORM WITH VISIBILITY BELOW A QUARTER OF A MILE. THIS INCLUDES
MARICOPA...YUMA...LA PAZ AND NORTHWEST PINAL COUNTIES...WHICH
INCLUDES THE GREATER PHOENIX AREA...BOUSE...YUMA...AND CASA GRANDE.

STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY.

CRAIG ELLIS

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.