Tomorrow is forecast to be nearly the same temperature as today.
Nowcast as of 3:36 PM HST on November 12, 2009
Now
Widespread showers and thunderstorm are in progress across The Big Island...Maui County...and adjacent coastal waters moving northwest around 10 to 15 mph. Radar is estimating rain rates of 3 to 4 inches per hour...perhaps higher at times in the strongest thunderstorms. Some storms may also produce dangerous cloud to ground lightning. Additionally...the heaviest downpours will lead to ponding on roadways and in poor drainage areas...along with reduced visibilities which will make driving difficult. The heavy rains and thunderstorms will continue to move towards the northwest into the evening and nighttime hours reaching Oahu just after sunset.
Forecast for Oahu North Shore
Updated: 3:36 PM HST on November 12, 2009
High surf advisory in effect until 6 am HST Friday...
Flash Flood Watch in effect through Friday afternoon...
Tonight
Mostly cloudy. Occasional showers and thunderstorms in the evening...then showers and thunderstorms likely after midnight. Locally heavy rainfall possible. Lows 67 to 74. East winds 10 to 15 mph. Chance of rain 90 percent.
Friday
Partly sunny with a 50 percent chance of showers and thunderstorms. Locally heavy rainfall possible. Highs around 79. East winds 15 to 20 mph.
Mostly cloudy. Chance of showers and thunderstorms in the evening...then showers and thunderstorms likely after midnight. Breezy. Locally heavy rainfall possible. Lows 67 to 74. Southeast winds 15 to 25 mph. Chance of rain 70 percent.
Saturday
Mostly cloudy with showers likely. Breezy. Highs around 81. East winds 20 to 25 mph. Chance of rain 60 percent.
Mostly cloudy with a 50 percent chance of showers. Breezy. Lows 66 to 73. East winds 20 to 25 mph decreasing to 10 to 25 mph in the late evening and overnight.
Sunday
Mostly cloudy with a 50 percent chance of showers. Breezy. Highs around 80. East winds 10 to 25 mph increasing to 20 to 25 mph in the late morning and afternoon.
... Flash Flood Watch now in effect through Friday afternoon...
The Flash Flood Watch is now in effect for
* all Hawaiian islands.
* Through Friday afternoon.
* Low pressure west of the state will continue moving slowly west- southwest. The atmosphere over Hawaii will remain unstable enough for the possibility of heavy showers and thunderstorms overnight and Friday.
Precautionary/preparedness actions...
A Flash Flood Watch means that conditions may develop that lead to flash flooding. Prepare now for the possibility of very heavy rainfall that could cause flash flooding.
Campers and hikers should pay particular attention to later forecasts. Stay away from creeks... streams... and other flood prone areas. Remember that it does not have to be raining where you are for flash flooding to occur.
