Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 11, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 31, 1998, 12:30 PM MST for Gila 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
- Jul 31, 1998, 12:30 PM MST (19:30 UTC)
- Expired
- Jul 31, 1998, 2:30 PM MST
- In force
- 2 hr
- 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 19:33 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
Phoenix, AZ (KPHX), launched 12:00Z, 7.5 hours before the alert went out and 115 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
- 493 J/kg
- Mixed-layer CIN
- -209 J/kg
- Mixed-layer LCL
- 1757 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 311932 FFWPHX AZC007-312035- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 1230 PM MST FRI JUL 31 1998 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * FLASH FLOOD WARNING FOR SOUTH-CENTRAL GILA COUNTY IN CENTRAL ARIZONA * UNTIL 230 PM MST * SOME LOCATIONS AFFECTED INCLUDE GLOBE...MIAMI...CLAYPOOL AT 1220 PM...DOPPLER RADAR DETECTED ANOTHER AREA OF MODERATE TO HEAVY RAIN MOVING INTO THE GLOBE-MIAMA AREA. CONSIDERABLE FLOODING HAS OCCURRED IN THE GLOBE AREA...AND MORE FLOODING IS EXPECTED TO CONTINUE.
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, Jul 31, 12:20 PM MST, 10 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1220 PM MST FRI JUL 31 1998 AZZ020>028-CAZ030>033-011200- MARICOPA-SOUTHERN GILA-NORTHWEST PINAL-YUMA-LA PAZ-IMPERIAL- CENTRAL/EASTERN RIVERSIDE-JOSHUA TREE NATIONAL PARK- ...THERE IS A HIGH RISK OF HAZARDOUS WEATHER IN SOUTHERN GILA COUNTY THIS AFTERNOON AND EVENING... ...THERE IS A MODERATE RISK OF HAZARDOUS WEATHER IN NORTHEAST MARICOPA AND NORTH-CENTRAL PINAL COUNTIES THIS AFTERNOON AND EVENING... 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. ********************************************************************* 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) DAMAGING 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
Special weather statement, Jul 31, 12:20 PM MST, 10 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1220 PM MST FRI JUL 31 1998 AZZ020>028-CAZ030>033-011200- MARICOPA-SOUTHERN GILA-NORTHWEST PINAL-YUMA-LA PAZ-IMPERIAL- CENTRAL/EASTERN RIVERSIDE-JOSHUA TREE NATIONAL PARK- ...THERE IS A HIGH RISK OF HAZARDOUS WEATHER IN SOUTHERN GILA COUNTY THIS AFTERNOON AND EVENING... ...THERE IS A MODERATE RISK OF HAZARDOUS WEATHER IN NORTHEAST MARICOPA AND NORTH-CENTRAL PINAL COUNTIES THIS AFTERNOON AND EVENING... 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. ********************************************************************* 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) DAMAGING 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
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 11:11 AM MST | Flash Flood Warning | PSR | Gila | 79 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.