FNMY50 PGUM 091717

FWFGUM



Fire Weather Planning Forecast for Guam

National Weather Service Tiyan GU

317 AM ChST Sat May 10 2025



...RED FLAG WARNING IN EFFECT UNTIL 4 PM CHST SUNDAY...



.Discussion...

A trace of rain fell at the Guam International Airport yesterday. 

The KBDI rose to 727, which is in the extreme category due to daytime

winds of 15 to 20 mph. Terrain forcing of winds and occasional gust

could make fire fighting drastically harder. The fire danger is 

expected to become critical during the daytime hours, with afternoon 

relative humidities expected to drop below 60 percent, and elevated 

winds, especially in higher terrain. A wetting rain is not expected 

for at least the next several days, and the KBDI is expected to 

continue to rise.



GUZ001-101730-

Guam-

317 AM ChST Sat May 10 2025



...RED FLAG WARNING IN EFFECT UNTIL 4 PM CHST SUNDAY...



                      Today        Tonight      Sun          



Cloud Cover           Pcldy        Pcldy        Pcldy        

Precip Type           Showers      Showers      Showers      

Chance Rain (%)       10           10           20           

Temp                  89           77           89           

RH %                  60           90           60           

20FtWnd-Val/AM(mph)   E 12 G20                  E 12 G21     

20FtWnd-Rdg/PM(mph)   E 13 G21     E 12         E 12 G20     

Mixing Hgt(ft-msl)    6186         374          6164         

Transport Wnd (mph)   E 18         E 14         E 20         



$$





.Forecast for Days 3 Through 7...



.SUNDAY NIGHT...Partly cloudy. Lows in the upper 70s. East winds

10 to 20 mph. 

.MONDAY...Mostly sunny with isolated showers. Highs in the upper

80s. East winds 10 to 20 mph. 

.MONDAY NIGHT...Partly cloudy with isolated showers. Lows in the

upper 70s. East winds 10 to 20 mph. 

.TUESDAY...Mostly sunny with isolated showers. Highs in the upper

80s. East winds 10 to 15 mph. 

.TUESDAY NIGHT...Partly cloudy with a slight chance of showers.

Lows in the upper 70s. East winds 10 to 15 mph. 

.WEDNESDAY...Mostly sunny. Highs in the upper 80s. East winds

10 to 15 mph. 

.WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers.

Lows in the upper 70s. East winds 10 to 15 mph. 

.THURSDAY...Mostly sunny. Highs in the upper 80s. East winds

10 to 15 mph. 

.THURSDAY NIGHT...Partly cloudy with a slight chance of showers.

Lows in the upper 70s. East winds 10 to 15 mph. 

.FRIDAY...Mostly sunny. Highs in the upper 80s. East winds 10 to

15 mph. 





$$