Agana Heights, Guam Weather Conditions

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Current Conditions

  • 77°
  • Heavy Rain
  • Wind: West 29 mph
  • Humidity: 96%
  • Visibility: 1.2 miles
  • Dew Point: 76°
  • Pressure: 29.67 in. 0

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Next 12 Hours

10  am
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Thunderstorm
T-storms
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T-storms
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84°
84°
84°
81°
79°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Thunderstorm
  • High: 84 °
  • Low: 77 °
  • T-Storms
  • Thursday
  • Thunderstorm
  • High: 84 °
  • Low: 79 °
  • T-Storms
  • Friday
  • Thunderstorm
  • High: 86 °
  • Low: 84 °
  • T-Storms
  • Saturday
  • Chance of a Thunderstorm
  • High: 86 °
  • Low: 79 °
  • Chance of T-Storms
  • Sunday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 84 °
  • Chance of T-Storms

Forecast for Agana Heights, Guam

Updated: 7:00 AM ChST on July 30, 2014

High surf advisory in effect until 6 am chst Sunday...
  • Wednesday

    Overcast with thunderstorms and rain showers. High of 84F with a heat index of 91F. Windy. Winds from the NNW at 30 to 40 mph with gusts to 45 mph. Chance of rain 80%.

  • Wednesday Night

    Overcast with thunderstorms and rain showers. Fog overnight. Low of 77F. Windy. Winds from the West at 50 to 55 mph with gusts to 65 mph. Chance of rain 80%.

  • Thursday

    Overcast with thunderstorms and rain showers. High of 84F with a heat index of 91F. Windy. Winds from the SSW at 30 to 40 mph with gusts to 45 mph. Chance of rain 50%.

  • Thursday Night

    Partly cloudy with thunderstorms and rain showers. Low of 79F. Windy. Winds from the SSW at 15 to 35 mph. Chance of rain 50%.

  • Friday

    Partly cloudy with thunderstorms and rain showers in the morning, then overcast with a chance of a thunderstorm and rain. High of 86F with a heat index of 93F. Breezy. Winds from the SSW at 10 to 25 mph. Chance of rain 40%.

  • Friday Night

    Overcast with a chance of a thunderstorm and rain. Low of 84F with a heat index of 93F. Breezy. Winds from the South at 15 to 20 mph. Chance of rain 50%.

  • Saturday

    Overcast with a chance of a thunderstorm and rain. High of 86F with a heat index of 93F. Breezy. Winds from the SSW at 15 to 20 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Saturday Night

    Overcast with a chance of a thunderstorm and rain. Low of 79F. Breezy. Winds from the South at 15 to 20 mph. Chance of rain 70% with rainfall amounts near 0.8 in. possible.

  • Sunday

    Overcast with a chance of a thunderstorm and rain. High of 84F with a heat index of 91F. Breezy. Winds from the SSW at 15 to 25 mph. Chance of rain 70% with rainfall amounts near 0.8 in. possible.

  • Sunday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 84F with a heat index of 91F. Breezy. Winds from the SSW at 20 to 25 mph. Chance of rain 60% with rainfall amounts near 0.4 in. possible.

  • Monday

    Overcast with a chance of a thunderstorm. High of 86F with a heat index of 97F. Breezy. Winds from the South at 20 to 25 mph. Chance of rain 40%.

  • Monday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 79F. Breezy. Winds from the SSW at 15 to 25 mph. Chance of rain 40%.

  • Tuesday

    Overcast with a chance of a thunderstorm. High of 88F with a heat index of 97F. Breezy. Winds from the South at 10 to 20 mph. Chance of rain 20%.

  • Tuesday Night

    Overcast. Low of 77F. Winds from the SSE at 5 to 15 mph.

  • Wednesday

    Overcast. High of 86F. Winds from the SE at 5 to 10 mph.

  • Wednesday Night

    Mostly cloudy. Low of 77F. Winds from the SE at 5 to 10 mph.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Low of 77F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Mostly cloudy with a chance of a thunderstorm. High of 84F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 77F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday

    Overcast. High of 86F. Winds from the SSE at 5 to 10 mph.

  • Saturday Night

    Clear. Low of 79F. Winds less than 5 mph.

  • Sunday

    Clear. High of 86F. Winds from the SSE at 5 to 10 mph.

Severe Weather Alert Descriptions

 Flash Flood Warning  Statement as of 10:16 am CHST on July 30, 2014


The National Weather Service in tiyan Guam has issued a

* Flash Flood Warning for the islands of Guam and Rota...

* until 115 PM chst.

* At 1015 am chst... radar imagery shows torrential rain continuing
over Guam. Rainfall amounts of 5 to 7 inches have already fallen
on Guam since yesterday morning. Additional rainfall amounts of 6
to 9 inches are possible during the next several hours on Guam as
Tropical Storm Halong moves over the marianas. Additional rainfall
of 3 to 4 inches is possible on Rota as the northern eyewall moves
over the island.

Precautionary/preparedness actions...

A Flash Flood Warning means flash flooding is imminent or occurring
in streams... roads and low lying areas. Move to higher ground now.

Do not cross fast flowing or rising water in your vehicle or on foot.
Turn around... Don/T drown.


There is a high potential for mudslides especially in the steep
terrain across southern Guam.

This warning may need to be extended beyond 100 PM chst if flash
flooding persists.

Lat... Lon 1425 14532 1401 14525 1375 14492 1356 14503
      1327 14488 1318 14466 1345 14457 1393 14503
      1428 14514




 High Surf Advisory, Flash Flood Watch  Statement as of 10:56 PM CHST on July 29, 2014


... High surf advisory remains in effect until 6 am chst Sunday...

A high surf advisory remains in effect until 6 am chst Sunday...
but has been superceded by tropical cyclone warnings.

Precautionary/preparedness actions...

Avoid venturing near exposed reefs and beaches... especially those
along all reefs as rip currents are life threatening. Stay out of
the water.





1003 am chst Tue Jul 29 2014

... Flash Flood Watch in effect through Thursday morning...

The National Weather Service in tiyan has issued a

* Flash Flood Watch for Guam... Rota... Tinian and Saipan.

* Now through Thursday morning.

* Rainfall of 3 to 5 inches are probable by noon Wednesday.

* Stay away from flooded roads and pay attention to stream and
river levels.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.



Chan



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Maite, Maite, GU

Updated: 10:54 AM ChST

Temperature: 76.4 °F Dew Point: 76 °F Humidity: 97% Wind: West at 19.0 mph Pressure: 29.68 in Hourly Precipitation: 0.36 in Heat Index: 76 °F Graphs

Location: Ordot Dump, Chalan Pago Ordot

Updated: 6:58 AM ChST

Temperature: 77.2 °F Dew Point: 76 °F Humidity: 97% Wind: West at 23.0 mph Pressure: 29.70 in Hourly Precipitation: 0.42 in Heat Index: 78 °F Graphs

Location: Perezville, Tamuning, Guam

Updated: 10:10 AM ChST

Temperature: 78.2 °F Dew Point: 77 °F Humidity: 96% Wind: SSW at 21.0 mph Pressure: 29.56 in Hourly Precipitation: 0.84 in Heat Index: 81 °F Graphs

Location: Mangilao, Mangilao, GU

Updated: 9:25 AM ChST

Temperature: 75.1 °F Dew Point: 71 °F Humidity: 86% Wind: WNW at 12.0 mph Pressure: 29.69 in Hourly Precipitation: 0.22 in Heat Index: 75 °F Graphs

Location: Latte Heights, Dededo

Updated: 8:07 AM ChST

Temperature: 77.0 °F Dew Point: 71 °F Humidity: 81% Wind: ENE at 8.0 mph Pressure: 29.67 in Hourly Precipitation: 0.91 in Heat Index: 79 °F Graphs

Location: Jeffs Pirates Cove, Guam, Ipan Talofofo, GU

Updated: 10:54 AM ChST

Temperature: 76.6 °F Dew Point: 75 °F Humidity: 94% Wind: SW at 7.0 mph Pressure: 29.64 in Hourly Precipitation: 0.94 in Heat Index: 77 °F Graphs

Location: Ypaopao Estates, Dededo

Updated: 10:52 AM ChST

Temperature: 75.7 °F Dew Point: 74 °F Humidity: 96% Wind: NNE at 4.0 mph Pressure: 29.21 in Hourly Precipitation: 1.36 in Heat Index: 75 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service tiyan GU 
521 am chst Wednesday Jul 30 2014 


Marianas synopsis... 
radar at 0430l shows the eye of Tropical Storm Halong is 65 miles 
east-southeast of Rota...moving west-northwest roughly toward Rota. 
Halong is gradually becoming more intense and could move across Rota 
by noon as a typhoon...while probably causing tropical storm force 
conditions for Saipan...Tinian and Guam. 


&& 


Discussion... 
main focus of the forecast package is of course Tropical Storm 
Halong which is arriving at the expected strength but just a 
littler earlier than previously forecasted. Rota is under a 
typhoon warning...while Guam is under a typhoon watch/Tropical 
Storm Warning...Tinian and Saipan are under tropical storm 
watches. We also issued a Flash Flood Warning for Rota and Guam 
and several other hazardous weather products have been issued. 


&& 


Marine/tropical systems... 
Saipan and ritidian buoys both show combined seas of 10 to 11 feet 
mainly for west-southwest and ipan buoy shows seas around 4 feet from the east. 
The tropical cyclone tool along with forecast data from gfs40 were 
the main forecast guidance data loaded into wind grids. The ww3 data 
was used as guidance for wave grids but with generous adjustments 
based on a significant increase of hazardous sea conditions while 
Halong moves across the area. Hazardous seas and gusty winds will 
likely persist through Thursday and gradually diminish Friday. 


&& 


Eastern micronesia... 
surface ridging will keep pleasant weather in place at Chuuk and 
Pohnpei today. A weak disturbance north of Kosrae will slowly move 
west bringing showers and a few thunderstorms to Pohnpei late this 
evening. Isolated thunderstorms remain in the forecast for Kosrae and 
Pohnpei until Friday...and are in the forecast for Chuuk on Friday as 
the disturbance approaches then. Another weak disturbance is prognosticated 
to take shape near Majuro Friday and Saturday producing isolated 
showers and thunderstorms. Some models show this feature passing 
just to the north...but will stick with the GFS for now. Generally 
gentle winds are expected through the weekend. 


&& 


Western micronesia... 
reasoning for Chuuk forecast can be found above under the eastern 
micronesia section due to a similar synoptic pattern. 


Koror and Yap...satellite shows patchy deep convection around the 
Yap area and mainly fair skies over most of Palau. Ascat streamline 
analysis indicates stronger monsoon wind flow is gradually lifting 
northward away from Yap and Koror...but light to moderate south to 
southwest winds will likely continue across Koror and Yap the next 
few days at least. A little stronger and wetter southwest flow could 
return by this weekend. 


Lingering monsoonal swell will maintain hazardous surf for the 
Republic of Palau and Yap state this morning but is expected to 
subside below advisory levels later today. 


&& 


Gum watches/warnings/advisories... 
GU...Tropical Storm Warning for guz001-003-004. 


Typhoon watch for guz001. 


Flash Flood Watch through Thursday morning for guz001>004. 


High surf advisory until 6 am chst Sunday for guz001>004. 


Typhoon warning for guz002. 


Marianas waters...Tropical Storm Warning for pmz151-153-154. 


Typhoon warning for pmz152. 


&& 


$$ 


Stanko/M. Aydlett/Simpson 



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