Alert archive / Arizona / Flash Flood Warnings in 1990

Flash Flood Warning 25, NWS Phoenix, AZ

July 24, 1990Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 24, 1990, 3:03 AM MST for Maricopa County, Arizona. It was in force for 117 min.

The area

The counties it named.

The facts

Issued
Jul 24, 1990, 3:03 AM MST (10:03 UTC)
Expired
Jul 24, 1990, 5:00 AM MST
In force
117 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Maricopa County, AZ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 10.1 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 1990-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 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 1990-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
41 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
2646 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Local storm report, Jul 24, 3:00 AM MST, 3 minutes before
STORM REPORT...PRELIMINARY REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
255 AM MST TUE JUL 24 1990
                                  PATH    # PERSONS  EST. DAMAGE  CHARACTER
PLACE            DATE  TIME       L   W   KILL. INJ. PROP. CROPS   OF STORM

MARICOPA CO      24   ABOUT MIDNIGHT       0    0      ?     TSTM WINDS
NORTH PHOENIX
                 AIR COND./PARTS OF A ROOF BLOWN OFF A  CIRCLE K AT
                 40TH ST AND UNION HILLS.

                 CAR WINDOWS BLOWN OUT BY EITHER HAIL OR WINDS  AT
                 35TH AVE/BELL.

SIPPLE 0959Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 11:16 PM MSTSevere Thunderstorm WarningPSRMaricopa119 min
Jul 24, 3:03 AM MSTFlash Flood WarningPSRYavapai117 min

Nearby

Flash Flood Warnings in Arizona, 1990Every flash flood warning in 1990

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.