Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 8, NWS Phoenix, AZ

July 23, 1998Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 23, 1998, 4:26 PM MST for Gila County, Arizona. It was in force for 119 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
Jul 23, 1998, 4:26 PM MST (23:26 UTC)
Expired
Jul 23, 1998, 6:25 PM MST
In force
119 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 23:29 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, 11.4 hours before the alert went out and 181 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 1998-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1299 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 12:00Z on 1998-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
1299 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1131 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
34 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 
TTAA00 KPHX 232328
FFWPHX
AZC007-240125-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
426 PM MST THU JUL 23 1998


THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

*  FLASH FLOOD WARNING FOR
   SOUTHWESTERN GILA COUNTY IN CENTRAL ARIZONA

*  UNTIL 625 PM MST

*  AT 420 PM MST DOPPLER RADAR ESTIMATED RAINFALL RATES OF IN EXCESS
   OF 3 INCHES DURING THE PAST HOUR...JUST NORTH OF TORTILLA FLAT.
   AS A RESULT...FLASH dFLOODING IS CONSIDERED IMMINENT IN THE WARNED
   AREA.

*  SOME LOCATIONS AFFECTED INCLUDE
   SAGUARO LAKE AND SURROUNDING AREA
   TORTILLA FLAT
   CANYON LAKE AND SURROUNDING AREA

WILT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 6:32 PM MSTSevere Thunderstorm WarningPSRMaricopa63 min
Jul 22, 7:14 PM MSTSevere Thunderstorm WarningPSRLa Paz61 min
Jul 23, 2:18 PM MSTSevere Thunderstorm WarningPSRMaricopa47 min

Nearby

Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998

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.