Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 14, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 1, 1998, 6:45 PM MST for Pinal County, Arizona. It was in force for 2 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
- Aug 1, 1998, 6:45 PM MST (01:45 UTC)
- Expired
- Aug 1, 1998, 8:45 PM MST
- In force
- 2 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Pinal County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 1.8 hours before the alert went out and 92 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.
- Mixed-layer CAPE
- 439 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1321 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 239 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 020145 FFWPHX AZC021-020345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 645 PM MST SAT AUG 1 1998 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR NORTH CENTRAL PINAL COUNTY IN CENTRAL ARIZONA * UNTIL 845 PM MST * AT 645 PM MST DOPPLER RADAR ESTIMATED RAINFALL RATES IN EXCESS OF 2 INCHES DURING THE PAST HOUR BETWEEN QUEEN VALLEY AND SUPERIOR. AS A RESULT...FLASH FLOODING IS OCCURRING OR IMMINENT IN THE WARNING LOCATIONS. ALTHOUGH THE THUNDERSTORMS WERE EAST OF QUEEN VALLEY...QUEEN CREEK WILL CARRY RUN-OFF INTO QUEEN VALLEY FROM THE AREA OF HEAVY RAINFALL. * SOME LOCATIONS AFFECTED INCLUDE S UPERIOR QUEEN VALLEY US HIGHWAY 60 BETWEEN FLORENCE JUNCTION AND GILA/PINAL COUNTY LINE
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
Special weather statement, Aug 1, 1:15 PM MST, 5 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 115 PM MST SAT AUG 1 1998 AZZ020>028-CAZ030>033-021200- MARICOPA-SOUTHERN GILA-NORTHWEST PINAL-YUMA-LA PAZ-IMPERIAL- CENTRAL/EASTERN RIVERSIDE-JOSHUA TREE NATIONAL PARK- ...MODERATE RISK OF HAZARDOUS WEATHER IN SOUTHERN GILA...MARICOPA ...AND NORTHERN PINAL COUNTIES THIS AFTERNOON AND TONIGHT... HEAVY RAINFALL...WHICH COULD RESULT IN LOCALIZED FLASH FLOODING OR FLOODING...IS THE GREATEST HAZARD. RAINFALLS IN EXCESS OF 2 INCHES PER HOUR ARE POSSIBLE. STRONG GUSTY WINDS...HAIL...AND INTENSE CLOUD- TO-GROUND LIGHTNING CAN ALSO BE EXPECTED WITH THE MOST INTENSE STORMS. INDIVIDUAL STORMS WILL MOVE SLOWLY TOWARD THE NORTHEAST. STORMS ARE MOST LIKELY TO AFFECT THE GREATER PHOENIX METROPOLITAN AREA TONIGHT...BUT MAY AFFECT LOCATIONS SUCH AS GILA BEND...CASA GRANDE...AND GLOBE-MIAMI BY MID-AFTERNOON. ********************************************************************* HAZARDOUS WEATHER REFERS TO ANY OF THE FOLLOWING... 1) LOCALLY HEAVY RAINFALL RESULTING IN FLASH FLOODING OR FLOODING 2) SAND OR DUST STORM REDUCING VISIBILITY TO 1/4 MILE OR LESS 3) DAMAGINGF WINDS IN EXCESS OF 57 MPH 4) HAIL 3/4 INCH OR LARGER IN DIAMETER CHECK THE PHOENIX STATE FORECAST DISCUSSION FOR MORE INFORMATION. DG
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.