Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 24, NWS Phoenix, AZ

July 30, 2000Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 30, 2000, 8:03 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 42 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
Jul 30, 2000, 8:03 PM MST (03:03 UTC)
Expired
Jul 30, 2000, 8:45 PM MST
In force
42 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

Counties Maricopa County, AZ, Pinal County, AZ

What was reported inside it

TimeReportWhereRemark
Jul 30, 8:30 PM MSTThunderstorm Wind 60 ECoolidge, AZWinds damaged the roof of a trailer.

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, 3.1 hours before the alert went out and 34 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 2000-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 184 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 2000-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.193958Sfc1 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
184 J/kg
Mixed-layer CIN
-171 J/kg
Mixed-layer LCL
3378 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
19 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 310309
SVRPHX
AZC013-021-310335-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
803 PM MST SUN JUL 30 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA
  NORTH CENTRAL PINAL COUNTY IN SOUTH CENTRAL ARIZONA

* UNTIL 845 PM MST

* AT 758 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES EAST OF FLORENCE JUNCTION...OR ABOUT 4
  MILES WEST OF SUPERIOR...MOVING WEST AT 30 MPH.

VERY LARGE HAIL AND DAMAGING WINDS TO NEAR 60 MPH IS 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.

THE THUNDERSTORMS ARE APPROACHING THE EAST VALLEY AND COULD AFFECT 
THE APACHE JUNCTION AND QUEEN CREEK AREAS BY 830 PM MST. 

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

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

LAT...LON 3327 11167 3316 11116 3"335 11110 3355 11153

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 30, 2:45 PM MST, 5 hours 18 minutes earlier.

Area forecast discussion, Jul 30, 2:45 PM MST, 5 hours 18 minutes before
AZZ020>028-CAZ030>033-310545-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
245 PM MST SUN JUL 30 2000

.SYNOPSIS...
UPPER LEVEL HIGH PRESSURE OVER THE GREAT BASIN REGION WILL GIVE AN
EAST NORTHEAST FLOW TO THE ENTIRE FORECAST AREA THIS WEEK. MOISTURE
LEVELS ARE EXPECTED TO INCREASE DURING THE NEXT COUPLE OF DAYS...AND
REMAIN HIGH ENOUGH TO HELP FEED LATE AFTERNOON AND EVENING SHOWERS
AND THUNDERSTORMS. THIS THUNDERSTORM THREAT WILL EVENTUALLY REACH ALL
THE WAY INTO SOUTHEAST CALIFORNIA BY MONDAY NIGHT AND THEREAFTER.
MEANWHILE...AFTERNOON TEMPERATURES WILL CONTINUE TO BE NEAR LATE JULY
NORMALS.

.DISCUSSION...
AFTERNOON CONVECTION HAS BEEN QUITE SLOW TO FORM AND SO FAR HAS BEEN
PRETTY WIMPY. SATELLITE PIX SHOW WEAK CBS FORMING ALONG MOGOLLON RIM
THEN DISSIPATING QUICKLY WITH ANVIL TOPS SCOOTING SWWD. MOISTURE...OR
RELATIVE LACK THEREOF...CONTINUES TO BE THE ONLY NEGATIVE FACTOR TO
WHAT OTHERWISE SHOULD BE A VERY ACTIVE...POSSIBLY SEVERE...DAY. 12Z
MODELS HINTED THAT SOME BRIEF MID LEVEL DRYING HAS OCCURED OVER ERN
AZ TODAY...AND WITH THE WIMPY CONVECTION...THIS MAY BE THE CASE.
HOWEVER...APPROACHING IMPULSE OVER NM...ALONG WITH OTHER POSSIBLE
RIPPLES EMBEDDED IN THE NELY FLOW...HAS US STILL HOPING FOR SOME
EVENING DESERT CONVECTION. ISSUED AN HAZARDOUS WEATHER OUTLOOK
EARLIER...DUE TO THE SEVERE MICROBURST POTENTIAL WITH ANY STORMS THAT
DO PROPOGATE OFF THE RIM OUR DIRECTION THIS EVENING. RAINFALL WITH
ANY STORMS TONIGHT WILL BE LIGHT AND SPOTTY DUE TO RELATIVELY DRY
LOWER LEVELS. THEREFORE...CUT POPS TO SLIGHT CHANCE VALUES...WITH THE
THREAT OF STORMS OCCURING SOMEWHAT HIGHER. RAISED POPS UP TO CHANCE
CATEGORIES MONDAY NIGHT AS WE SHOULD BE A LITTLE WETTER BY THEN.
ALSO...STARTED TO INTRODUCE SOME MINOR POPS INTO SE CA BY TOMORROW
NIGHT AS DEEP E/NELY FLOW COULD TAKE SOME ACTION THAT FAR WEST. THE
EXTENDED WILL BE LEFT AzS IS...WITH A CHANCE OF STORMS GOING EACH DAY
AS UPPER HIGH TO OUR N STAYS PUT.    ESTLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 6:36 PM MSTSevere Thunderstorm WarningPSRGila39 min
Jul 30, 7:20 PM MSTSevere Thunderstorm WarningPSRMaricopa45 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.