Alert archive / Guam / Flash Flood Warnings in 2004

Flash Flood Warning 10, NWS Guam

August 26, 2004

NWS Guam issued this flash flood warning at Aug 26, 2004, 8:00 PM CDT. It was in force for 6 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 26, 2004, 8:00 PM CDT (01:00 UTC)
Expired: Aug 27, 2004, 2:00 AM CDT
In force: 6 hr
Issued by: NWS Guam
Area: Whole counties

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGMY50 PGUM 270057
FFWMY 
GUZ001-002-003-004-270700-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TIYAN GU
11 AM LST FRI AUG 27 2004

THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE MARIANA ISLANDS OF GUAM...ROTA...TINIAN AND SAIPAN.

* UNTIL 500 PM LST. 

* AT 11 AM LST...SATELLITE AND DOPPLER WEATHER RADAR IMAGERY    
  SHOWED WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS OVER THE 
  MARIANAS. THE RAIN IS ASSOCIATED WITH THE OUTER RAINBANDS OF 
  APPROACHING TROPICAL STORM 21W. THESE WIDESPREAD SHOWERS AND 
  THUNDERSTORMS WILL PERSIST THROUGH LATE AFTERNOON.

* HOURLY RAINFALL RATES UP TO ONE INCH CAN BE EXPECTED. RAINFALL 
  TOTALS IN EXCESS OF SIX INCHES ARE POSSIBLE BY LATE AFTERNOON.
 
* EXPECT FLASH FLOODING TO OCCUR IN VALLEYS...AT THE BASE OF 
  MOUNTAINS...ALONG RIVERS AND STREAMS...ALONG ROADWAYS AND IN   
  LOW-LYING AREAS.

IF YOU LIVE IN A LOW-LYING AREA...AT THE BASE OF MOUNTAIN VALLEYS... 
OR NEAR STREAMS AND RIVERS...GO TO HIGHER GROUND AT ONCE. AVOID 
DRIVING. NEVER TRY TO CROSS A FLOODED ROAD.

$$

HENDRICKS

1 follow-up statement

000 
WGMY70 PGUM 270447
FFSMY 
GUZ001-002-003-004-270700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TIYAN GU
245 PM LST FRI AUG 27 2004

...FLASH FLOOD WARNING CANCELED FOR ROTA...TINIAN AND SAIPAN...
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR GUAM UNTIL 5 PM LST...

THE HEAVY RAIN HAS TAPERED OFF ACROSS ROTA...TINIAN AND 
SAIPAN. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN CANCELED. 

SATELLITE AND RADAR CONTINUE TO SHOW HEAVY TO MODERATE RAINFALL   
MOVING SLOWLY SOUTHWARD ACROSS GUAM. THE RAIN SHOULD TAPER OFF BY 
4 PM. FOR GUAM RESIDENTS...IF YOU PLAN TO DRIVE...BE PREPARED FOR 
SLIPPERY ROADS. DO NOT DRIVE THROUGH AREAS WHERE WATER COVERS THE 
ROAD OR THROUGH AREAS OF FLOWING WATER.

HERE ARE RAINFALL TOTALS FROM 11 AM TO 2 PM TODAY...

GUAM INTL AIRPORT/TIYAN.........................  0.68 INCHES
APRA HARBOR (AUTOMATED GAUGE)...................  1.30 INCHES
INARAJAN (AUTOMATED GAUGE)......................  2.96 INCHES
MANGILAO (AUTOMATED GAUGE)......................  0.62 INCHES
MERIZO (AUTOMATED GAUGE)........................  0.94 INCHES
ROTA (AUTOMATED GAUGE)..........................  0.61 INCHES
SAIPAN INTERNATIONAL AIRPORT....................  0.26 INCHES

$$

HENDRICKS

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.

NWS Guam wrote its last area forecast discussion before this flash flood warning went out at Aug 26, 10:04 AM CDT, 9 hours 56 minutes earlier.

Area forecast discussion, Aug 26, 10:04 AM CDT, 9 hours 56 minutes before

AREA SYNOPTIC DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
1 AM GUAM LST FRI AUG 27 2004

WESTERN NORTH PACIFIC BETWEEN EQUATOR AND 25N FROM 130E TO 180.

TYPHOON CHABA IS CENTERED FAR NORTHWEST OF THE MARIANAS NEAR 25N135E
MOVING NORTH-NORTHWEST AT 9 MPH WITH MAXIMUM SUSTAINED WINDS OF 160
MPH. HEAVY SHOWERS AND THUNDERSTORMS EXTEND OUTWARD UP TO 120 MILES
FROM THE CENTER. LOW-LEVEL CONVERGENCE INTO THE TYPHOON CHABA IS
PRODUCING SCATTERED SHOWERS AND THUNDERSTORMS BETWEEN 12N AND 19N
FROM 130E TO 138E. SEE JOINT TYPHOON WARNING CENTER (JTWC) BULLETIN
WTPN32 PGTW FOR MORE DETAILS.

A NEWLY FORMED TROPICAL DEPRESSION 21W IS LOCATED EAST OF THE
MARIANAS NEAR 13N152E MOVING WEST-NORTHWEST AT 5 MPH WITH MAXIMUM
SUSTAINED WINDS OF 30 MPH. SCATTERED SHOWERS AND THUNDERSTORMS ARE
OCCURRING BETWEEN 12N AND 17N FROM 146E TO 152E. REFER JTWC BULLETIN
WTPN34 PGTW FOR MORE INFORMATION.

A MONSOON TROUGH EXTENDS FROM NEAR 24N130E THROUGH TYPHOON CHABA TO
THE TROPICAL DEPRESSION 21W TO ANOTHER CIRCULATION NEAR 11N170E.
FOR MORE INFORMATION...SEE JTWC BULLETIN WTPN21 PGTW. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS ASSOCIATED WITH THE CIRCULATION
NEAR KWAJALEIN ARE OCCURRING BETWEEN 8N AND 15N FROM 162E TO 180.

Nearby

Flash Flood Warnings in Guam, 2004 Every flash flood warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.