Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 61, NWS Phoenix, AZ

October 27, 2000Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Oct 27, 2000, 2:05 PM MST for Maricopa County, Arizona. It was in force for 50 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
Oct 27, 2000, 2:05 PM MST (21:05 UTC)
Expired
Oct 27, 2000, 2:55 PM MST
In force
50 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 21:05 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.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.1 hours before the alert went out and 198 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, Tuscon, AZ at 12:00Z on 2000-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Tuscon, AZ at 12:00Z on 2000-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1297 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
172 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 272104
SVRPHX
AZC013-272155-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
205 PM MST FRI OCT 27 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA

* UNTIL 255 PM MST

* AT 202 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM JUST SOUTH OF CASHION...MOVING NORTH AT 30
  MPH.


* THE SEVERE THUNDERSTORM WILL AFFECT...
  CASHION
  LITCHFIELD PARK
  TOLLESON
  WEST PHOENIX
  GLENDALE

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

MB
!

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 Oct 27, 9:55 AM MST, 4 hours 10 minutes earlier.

Area forecast discussion, Oct 27, 9:55 AM MST, 4 hours 10 minutes before
AZZ020>028-CAZ030>033-272245-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
955 AM MST FRI OCT 27 2000

.SYNOPSIS...
A LOW PRESSURE SYSTEM IS EXPECTED TO BRING SHOWERS AND SCATTERED
THUNDERSTORMS TO THE FORECAST AREA TODAY AND THIS EVENING. LOCALLY
HEAVY RAIN IS POSSIBLE TODAY...ESPECIALLY OVER HIGHER TERRAIN SITES
IN SOUTHWEST AND SOUTH CENTRAL ARIZONA. AFTER A BRIEF BREAK IN THE
WEATHER THIS WEEKEND...THE NEXT SYSTEM IN THIS SERIES OF
DISTURBANCES IS FORECAST TO BRING A CHANCE OF SHOWERS TO THE AREA
EARLY NEXT WEEK...BEGINNING IN SOUTHEAST CALIFORNIA LATE SUNDAY
...SPREADING TO SOUTHWEST ARIZONA ON MONDAY...THEN CLEARING FROM
WEST TO EAST ACROSS THE REGION TUESDAY.

.DISCUSSION...
NEGATIVE TILT TROUGH SYSTEM DIGGING SEWD ALG SW CA/NW BAJA COAST
ACCORDING TO LATEST WV IMAGERY. NICE BANDS OF PRECIP HAVE DEVELOPED
IN STRONG UVV AREA FRM WCNTRL INTO NW AZ. RADAR ESTIMATES OF WELL IN
EXCESS OF AN INCH IN SOME SPOTS TO W OF PHX...COMBINED WITH ANTECEDENT
CONDITIONS ...PROMPTED THE ISSUANCE OF FFW FOR CENTENNIAL WASH AREA
INTO THIS AFTERNOON. OF COURSE...THIS IS AREA THAT RECEIVED FLOODING
RAINS LAST WEEKEND. ALTHOUGH RAINFALL THIS AREA HAS DECREASED...
FLOWS HAVE NOT AND SINCE MORE HEAVY RAIN EXPECTED...FFW STILL LOOKS
GOOD. REST OF CENTRAL AZ SHOULD STILL SEE INCREASING SHOWERS/TSTMS
THROUGH THE AFTERNOON IN STRONG UPPER DIFFLUENT AREA AND GOOD MID
LEVEL UVV AHEAD OF MAIN TROUGH. ONE MINOR CONCERN THAT MAY EFFECT
LONGEVITY OF HEAVY RAINS IS THE FACT THE FINAL VORT MAX WILL BE
TRAVERSING WELL TO OUR S. THIS CUTS OFF STRONG VERTICAL MOTIONS THIS
EVENING. SO...IF THIS IS RIGHT...ANY FLOODING-PRODUCING RAINS WOULD
PROBABLY OCCUR BEFORE ABOUT 06Z. MAY NEED TO EXTEND FFA FOR ERN CWFA
...LIKE PHX AREA EWD...INTO THE EVENING HOURS...WILL DISCUSS THIS
WITH TWC AT BLASTUP TIME. OTHERWISE...CURRENT FORECASTS APPEAR IN
GOOD SHAPE...ALTHOUGH WE MAY HAVE RAIN EVENT HANGING ON A BIT TOO
LONG TONIGHT AND SAT MORNING WRN AREAS. WILL ALSO LOOK AT THIS IN
MORE DETAIL FOR AFTERNOON PACKAGE CONSIDERATIONS. NO UPDATES FOR
NOW.   ESTLE

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 9:00 AM MSTFlash Flood WarningPSRLa Paz, Maricopa5 hr
Oct 27, 12:50 PM MSTFlash Flood WarningPSRLa Paz, Maricopa4 hr
Oct 27, 2:41 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal49 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; radar from the NEXRAD Level II archive.