Flash Flood Warning 9, NWS Flagstaff, AZ

Issued

Jul 31, 1998, 4:27 PM MDT (22:27 UTC)

Expired

Jul 31, 1998, 6:30 PM MDT

In force

2 hr

Issued by

NWS Flagstaff, AZ

Area

Whole counties

County Navajo County, AZ

The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 22:27 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.

000 
TTAA00 KFLG 312230
FFWFLG
AZC017-010025-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
327 PM MST FRI JUL 31 1998

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL NAVAJO COUNTY IN NORTHEASTERN ARIZONA

* UNTIL 530 PM MST

* AT 325 PM MST...FLAGSTAFF DOPPLER RADAR SHOWED A STRONG
  THUNDERSTORM PRODUCING VERY HEAVY RAIN NEAR JOSEPH CITY MOVING
  SLOWLY EAST ALONG INTERSTATE 40 TOWARDS HOLBROOK. RADAR ESTIMATED
  RAINFALL RATES OF AROUND 2 INCHES PER HOUR WITH THIS STORM.

* MINOR FLOODING HAS ALREADY BEEN REPORTED IN AND NEAR HOLBROOK.
  ADDITIONAL HEAVY RAIN MAY CAUSE SIGNIFICANT FLOODING IN
  SOUTHCENTRAL NAVAJO COUNTY THROUGH 530 PM MST.

IF YOU ARE IN THE WARNING AREA... MOVE TO HIGHER GROUND AT ONCE.
DO NOT DRIVE ACROSS WATER COVERED ROADS. AVOID ALL AREAS SUBJECT
TO FLOODING.

NWS Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Jul 31, 3:07 PM MDT, 1 hour 20 minutes earlier.

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
207 PM MST FRI JUL 31 1998

SYNOPSIS...SOME LOW LEVEL MOISTURE REMAINING OVER EASTERN ARIZONA
WILL CONTINUE TO CAUSE SOME AFTERNOON SHOWERS AND THUNDERSTORMS TO
DEVELOP THROUGH SATURDAY IN THE EAST CENTRAL MOUNTAINS. OVER THE
REMAINDER OF NORTHERN ARIZONA...SUNNY MORNINGS...WITH A FEW CLOUDS
DEVELOPING OVER THE HIGHER TERRAIN WILL BE THE RULE.

DISCUSSION...LOW TO MID LEVEL RH OVER THE EASTERN HALF OF CWA...WITH
A DECENT MOISTURE GRADIENT CUTTING N-S THROUGH THE AREA. SOME
EFFICIENT PRECIP PRODUCING STORMS HAVE DEVELOPED ALONG THE SOUTHERN
EDGE OF THIS BOUNDARY IN GILA COUNTY. FURTHER N...ATMOSPHERE A BIT
MORE STABLE...AND ALTHOUGH SOME CONVECTION HAS OCCURRED...IT HAS NOT
BEEN QUITE AS STRONG OVER THE NE. THIS COULD CHANGE A CAP ERODES THIS
AFTERNOON. 12Z ETA CONTINUING THE TREND OF DRYING CWA OUT...AND IS
MORE AGGRESSIVE WITH THIS THAN THE AVN-NGM. PREFER NGM THE BEST AS IT
KEEPS RH HANGING AROUND FOR A WHILE. AS TROUGH OVER S NV-UT LIFTS
OUT...WE SHOULD SEE HEIGHTS AND THICKNESS REBOUND SOME WHICH WILL
BRING A DEGREE OR TWO OF WARMING INTO THE AREA. OTHERWISE WILL KEEP
DRY CONDITIONS IN THE WEST...WITH ISOLD TO SCT POPS OVER THE EASTERN
PORTIONS OF THE CWA.

IN THE EXTENDED...WITH DECENT NORTHWESTERLY FLOW CONTINUING
MONDAY...IT SHOULD REMAIN DRY. THE 5H RIDGE BUILDS BACK IN...AND
SUSPECT THAT MONSOONAL FLOW WILL TAKE OVER ONCE AGAIN...ALLOWING FOR
THE DEVELOPMENT OF AFTERNOON SHOWERS AND THUNDERTORMS FOR DAY 4 AND
5 OF THE PERIOD.
MCGRATH
FLG 0000 INW 21--
FLG...NONE.

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

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.