Alert archive / Arizona / Flash Flood Warnings in 2000

Flash Flood Warning 17, NWS Phoenix, AZ

October 22, 2000Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Oct 22, 2000, 1:07 AM MST for Maricopa County, Arizona. It was in force for 4 hr. 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 22, 2000, 1:07 AM MST (08:07 UTC)
Expired
Oct 22, 2000, 5:00 AM MST
In force
4 hr
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 08:07 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 00:00Z, 8.1 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 00:00Z on 2000-10-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 108 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, Tuscon, AZ at 00:00Z on 2000-10-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
108 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1344 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
125 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 
WGUS55 KPSR 220807
FFWPSR
AZC013-221300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
107 AM MST SUN OCT 22 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE NORTH HALF OF MARICOPA COUNTY IN CENTRAL ARIZONA

* UNTIL 600 AM MST

* AT 100 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR...INDICATED
  ADDITIONAL THUNDERSTORMS DEVELOPING OVER THE NORTH HALF OF
  MARICOPA COUNTY.  THESE THUNDERSTORMS ARE EXPECTED TO INCREASE
  IN AREAL COVERAGE...AND INTENSITY...DURING THE EARLY MORNING
  HOURS.

  FLASH FLOODING WAS REPORTED EARLIER THIS EVENING IN THE
  WICKENBURG AREA...AND FLASH FLOODING OF NORMALLY DRY CREEKS AND
  WASHES WILL CONTINUE OVERNIGHT. AREAS IN THE FLASH FLOOD WARNING
  INCLUDE NORTH SCOTTSDALE...CAVE CREEK...CAREFREE...WICKENBURG...
  NEW RIVER...AND SUNFLOWER.  LOCALLY HEAVY RAIN MAY ALSO CAUSE
  FLOODING OVER MUCH OF THE PHOENIX	 METRO AREA OVERNIGHT.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

MB

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Oct 21, 9:21 PM MST, 3 hours 46 minutes earlier.

Area forecast discussion, Oct 21, 9:21 PM MST, 3 hours 46 minutes before
AZZ020>028-CAZ030>033-221045-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
921 PM MST SAT OCT 21 2000

.SYNOPSIS...
A STRONG PACIFIC WEATHER SYSTEM IS FORECAST TO MOVE INTO SOUTHERN
CALIFORNIA AND SOUTHWEST ARIZONA BY TONIGHT. IT WILL REMAIN NEARLY
STATIONARY THROUGH SUNDAY AND SUNDAY NIGHT. IT WILL BRING A WIDE
AREA OF RAIN ALONG WITH SCATTERED THUNDERSTORMS TO SOUTHWEST ARIZONA
AND SOUTHEAST CALIFORNIA THROUGH SUNDAY NIGHT AND MONDAY. RAINFALL
AMOUNTS COULD BE QUITE HEAVY DURING THAT PERIOD WITH FROM 1 TO 2
INCHES POSSIBLE IN SOME AREAS BY MONDAY MORNING. IT WILL BECOME MORE
SHOWERY LATE MONDAY AND TUESDAY...WITH SHOWERS MAINLY OVER CENTRAL
ARIZONA EARLY TUESDAY. PARLTY CLOUDY AND WARMER WEATHER IS FORECAST
FOR WEDNESDAY AND THURSDAY.

.DISCUSSION...
THUNDERSTORMS HAVE CONTINUED TO DEVELOP EAST OF THE UPR TROF...WITH
SEVERAL BANDS OF +TSRA. THE HEAVIEST PRECIP HAS BEEN AND SHOULD
CONTINUE TO BE IN NW MARICOPA CO.  VARIOUS WARNINGS AND STATEMENTS
COVER THIS SITUATION.  SIGNIFICANT RAINFALL AMOUNTS OVER THE NEXT 24
HOURS LIKELY...SO WILL CONTINUE FFA.

300MB WINDS STILL 120-130KTS ALONG CALIF WEST COAST WITH CLSD LOW
ALONG SAN DIEGO COAST. VERY STRONG DYNAMICS FUELING THESE STORMS IN
ARIZONA...AND WILL EXPECT LCL HEAVY AMOUNTS AS FCSTS INDICATE. NO
UPDATES THIS EVENING.  SIPPLE

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 8:21 PM MSTFlash Flood WarningPSRMaricopa99 min
Oct 21, 11:00 PM MSTFlash Flood WarningPSRMaricopa60 min
Oct 22, 3:01 AM MSTFlash Flood WarningPSRLa Paz3 hr
Oct 22, 6:38 AM MSTFlash Flood WarningPSRLa Paz4 hr

Nearby

Flash Flood Warnings in Arizona, 2000Every flash flood 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.