Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 5, NWS Phoenix, AZ

June 19, 2000Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Jun 19, 2000, 9:44 PM MST for Pinal County, Arizona. It was in force for 36 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: Jun 19, 2000, 9:44 PM MST (04:44 UTC)
Expired: Jun 19, 2000, 10:20 PM MST
In force: 36 min
Issued by: NWS Phoenix, AZ
Area: Whole counties

County Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 4.7 hours before the alert went out and 92 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 550 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 2096 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KPSR 200449
SVRPHX
AZC021-200520-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE PHOENIX AZ
944 PM MST MON JUN 19 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

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

* UNTIL 1020 PM MST

* AT 940 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM 5 MILES SOUTH OF FLORENCE... MOVING NORTHEAST
  AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...FLORENCE AND VICINITY...
  ESPECIALLY THOSE HOMES AND TRAILERS SOUTHEAST AND EAST OF
  FLORENCE.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

HV

 
N

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 Jun 19, 9:10 PM MST, 34 minutes earlier.

Area forecast discussion, Jun 19, 9:10 PM MST, 34 minutes before

AZZ020>028-CAZ030>033-201045-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
910 PM MST MON JUN 19 2000

.SYNOPSIS...
MOISTURE-LADEN AIR FROM THE GULF OF CALIFORNIA HAS OVERSPREAD
SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA. THIS WILL LEAD TO
AFTERNOON AND EVENING THUNDERSTORMS OVER PORTIONS OF SOUTH CENTRAL
ARIZONA THROUGH WEDNESDAY. LOCALLY HEAVY RAINFALL IS POSSIBLE ON
WEDNESDAY AS A WEAK UPPER DISTURBANCE APPROACHES THE AREA.

.DISCUSSION...
THUNDERSTORMS OVER THE EASTERN PORTIONS OF THE CWA AT 0330Z...
INCLUDING OUR MOUNTAINOUS ZONE 24 HAVE DISSIPATED. THERE WERE STILL
DEVELOPING THUNDERSTORMS JUST TO THE NORTHEAST AND WEST OF TUCSON
AT THIS TIME...SO GRAVITY WAVES OR OUTFLOW BOUNDARYS COULD SPARK AN
ISOLATED THUNDERSTORM BEFORE MIDNIGHT. FORECASTS FOR THIS HAVE
ALREADY BEEN UPDATED.

OTHERWISE... THE MODELS ARE HAVING A TOUGH TIME FORECASTING 24 HOUR
CHANGES IN THE UPPER FLOW REGIME...300 MB AND ABOVE. TODAY WAS NO
DIFFERENT. 00Z TUE 300/250 MB PLOT SHOWED THE LEFT REAR ENTRANCE
REGION TO A JETMAX (FROM TUS...ELP...MAF)...MOVED OVER NORTHERN AND
CENTRAL AZ WHICH STABILIZED THE AIRMASS.  THE FIRST CLUE WAS IN THE
LATE AFTERNOON WHEN A LARGE OUTFLOW BOUNDARY PUSHED WESTWARD...
FROM CONVECTION NORTH OF TUCSON...INTO A HIGH THETA E FIELD...
GENERATING VERY LITTLE ACTIVITY.

GOES 10 PRECIPITABLE WATER IMAGERY SHOWED A PLUME OF 1.25+ INCHES OF
PRECIPITATABLE EXTENDING INTO SOUTH CENTRAL AZ FROM MEXICO.

FOR TUESDAY...VAPOR PICTURES AND UPPER AIR PLOTS SHOW A COUPLE OF
UPPER LEVEL PERTURBATIONS...ONE OVER SOUTHERN CA AND THE OTHER
OVER SOUTHWEST IDAHO...MOVING TOWARD AZ.  THIS MAY CREATE FAVORABLE
UPPER WIND SUPPORT FOR LARGE CONVECTION...ALTHOUGH THE MODELS DO NOT
FORECAST THIS ON TUESDAY.  INFACT THE ETA AND NGM FORECAST AN
UNFAVORABLE...UNSUPPORTIVE WIND REGIME TUESDAY.

SINCE WE HAVE THE MOISTURE AND POTENTIAL INSTABILITY OVER SOUTH
CENTRAL AZ...AND A COUPLE OF UPPER LEVEL PERTURBATIONS ARE NEARBY...
WE THINK ANYTHING IS POSSIBLE ON TUESDAY. THEREFORE CURRENT FORECASTS
MENTIONING CONVECTIVE POTENTIAL TUE AND WED STILL LOOKS GOOD. NO MORE
UPDATES PLANNED. 02.

N

In the hours before

Local storm report, Jun 19, 5:17 PM MST, 4 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX, AZ
517 PM MST MON JUN 19 2000

TIME(MST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0430 PM    TEMPE                     AZ   0.25 INCH HAIL
06/19/00   MARICOPA                       REPORTED BY STORM
                                          SPOTTER

0443 PM    ROOSEVELT                 AZ   1.00 INCH HAIL
06/19/00   GILA                           REPORTED BY STORM
        SPOTTER

0448 PM    ROOSEVELT LAKE            AZ   1.50 INCH HAIL
06/19/00   GILA                           REPORTED BY STORM
                                          SPOTTER

N

Local storm report, Jun 19, 6:30 PM MST, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX, AZ
630 PM MST MON JUN 19 2000

TIME(MST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0141 PM    AHWATUKEE                 AZ   0.88 INCH HAIL
06/20/00   MARICOPA                       NICKEL SIZED HAIL
                                          REPORTED BY STORM
                                          SPOTTER

0206 PM    PHOENIX                   AZ   0.88 INCH HAIL
06/20/00   MARICOPA                       NICKEL SIZED HAIL
                                          REPORTED ASU STORM
                                          SPOTTER

0400 PM    WITTMANN                  AZ   WIND DAMAGE
06/20/00   MARICOPA                       POWER LINES DOWN
                                          REPORTED BY ARIZONA
                                          PUBLIC SERVICE

0430 PM    SALOME                    AZ   WIND DAMAGE
06/20/00   LA PAZ                         TREE DOWN
                                          REPORTED BY LA PAZ
                                           COUNTY SHERIFFS OFC

0500 PM    NEW RIVER                 AZ   FLASH FLOODING
06/20/00   MARICOPA                       NUMEROUS DRY WASHES
                                          FLOODED.  ONE VEHICLE
                                          SWEPT DOWNSTREAM
                                          RAINFALL 2.48 INCHES
                                          IN 90 MINUTES 7 NW
                                             MORRISTOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 12:34 PM MST	Severe Thunderstorm Warning	PSR	Pinal	61 min
Jun 20, 1:14 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	61 min
Jun 20, 1:33 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	67 min
Jun 20, 3:09 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	61 min
Jun 20, 3:45 PM MST	Flash Flood Warning	PSR	Maricopa	20 min
Jun 20, 4:05 PM MST	Severe Thunderstorm Warning	PSR	La Paz	75 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2000 Every 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.