Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Phoenix, AZ

August 1, 1998Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 1, 1998, 12:08 AM MST for Gila County, Arizona. It was in force for 57 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
Aug 1, 1998, 12:08 AM MST (07:08 UTC)
Expired
Aug 1, 1998, 1:05 AM MST
In force
57 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 07:11 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, 7.1 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 00:00Z on 1998-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 426 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 1998-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
426 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
2222 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
24 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 010709
FFWPHX
AZC007-010805-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1208 AM MST SAT AUG 1 1998

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

*  FLASH FLOOD WARNING FOR
   EASTERN GILA COUNTY IN SOUTH CENTRAL ARIZONA

*  UNTIL 105 AM MST
 
*  AT 1155 PM MST DOPPLER RADAR ESTIMATED RAINFALL RATES OF
   UP TO AN INCH PER HOUR NORTHEAST OF GLOBE. AS A RESULT...FLASH
   FLOODING IS OCCURRING OR IMMINENT IN THE WARNING LOCATIONS.

*  SOME LOCATIONS AFFECTED INCLUDE
   CUTTER AND SAN CARLOS ALONG U.S. ROUTE 70...EAST OF GLOBE.
 
IF FLASH FLOODING IS OBSERVED...ACT QUICKLY.  MOVE TO ESCAPE FLOOD
WATERS.  DO NOT STAY IN AREAS SUBJECT TO FLOODINGr WHEN WATER BEGINS
RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 10:24 PM MSTFlash Flood WarningPSRGila96 min
Jul 31, 11:39 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal61 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.