Updated: 3:18 AM WAKT on January 29, 2015
Windy with rain early...then remaining cloudy with showers for the afternoon. High 82F. Winds E at 20 to 30 mph. Chance of rain 100%.
Overcast with showers. Becoming windy overnight. Low 76F. Winds E at 20 to 30 mph. Chance of rain 60%.
Partly cloudy skies with gusty winds. High 83F. Winds E at 20 to 30 mph.
Windy. Partly cloudy skies early followed by a few showers overnight. Low 76F. Winds E at 20 to 30 mph. Chance of rain 30%.
Partly cloudy and windy. High 83F. Winds E at 20 to 30 mph.
A few clouds. Low 76F. Winds E at 15 to 25 mph.
Mostly sunny skies. High 82F. Winds ENE at 10 to 20 mph.
Partly cloudy skies. Low around 75F. Winds ENE at 10 to 20 mph.
Sunshine and clouds mixed. High 82F. Winds ENE at 10 to 20 mph.
Showers in the evening, then partly cloudy overnight. Low 74F. Winds ENE at 10 to 20 mph. Chance of rain 40%.
Sunshine and clouds mixed. High around 80F. Winds ENE at 10 to 20 mph.
A few clouds. Low 73F. Winds ENE at 10 to 20 mph.
Sunshine and clouds mixed. High 81F. Winds ENE at 15 to 25 mph.
Partly cloudy early with increasing clouds overnight. Low 74F. Winds ENE at 15 to 25 mph.
A few passing clouds, otherwise generally sunny. High 82F. Winds ENE at 15 to 25 mph.
A few clouds from time to time. Low near 75F. Winds E at 15 to 25 mph.
Intervals of clouds and sunshine. High 82F. Winds E at 15 to 25 mph.
Chance of a shower or two during the evening, followed by partly cloudy skies late. Low 76F. Winds E at 15 to 25 mph. Chance of rain 30%.
Partly cloudy early with thunderstorms becoming likely during the afternoon. High 82F. Winds E at 15 to 25 mph. Chance of rain 80%.
Thunderstorms likely. Low 76F. Winds E at 15 to 25 mph. Chance of rain 80%.
Windy...scattered thunderstorms in the morning, becoming more widespread in the afternoon. High 82F. Winds E at 20 to 30 mph. Chance of rain 80%.
Windy with scattered thunderstorms. Low 76F. Winds E at 20 to 30 mph. Chance of rain 60%.
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Area forecast discussion National Weather Service tiyan GU 559 PM chst Sat Mar 28 2015 Synopsis...east winds and a few showers prevail across the marianas this afternoon. A shear line was located near Tinian and Saipan. Tropical Storm Maysak will pass south of the marianas Monday. && Discussion... updated winds at various places in the forecast. The pressure gradient between high pressure to the north and Maysak will cause winds to increase Sunday across the local area and remain elevated on Monday. Models Show Low-level convergence north of Maysak which will cause a good chance of showers Monday through Tuesday night. Scattered showers are expected across the marianas at that time. Isolated showers should return Wednesday. && Marine... scatterometer data showed stronger winds across Tinian and Saipan waters in association with the shear line. Issued a Small Craft Advisory for tonight for this area. Winds will increase across all the marianas waters Sunday as the pressure gradient between high pressure to the north and Maysak increases. Expect small craft conditions for all the marianas waters Sunday through Tuesday morning. Wave watch data showers a southwest swell entering the area by midweek. Since Maysak is expected to become a typhoon it should send at least a few swell towards the marianas. Brought in a two foot swell from the southwest on Wednesday and continued it through at least Friday. && Eastern micronesia... Tropical Storm Maysak is moving across western micronesia. A near- equatorial trough extends southeastward from Maysak passing just south of Kosrae to end near tarawa atoll. Converging surface winds near this trough will continue to spark off convection near Pohnpei and Kosrae through tonight. As Maysak and the near-equatorial trough drift westward on Sunday...it will allow a surface ridge to shift from the Marshall Islands to over Kosrae and Pohnpei. Therefore expect quieter weather for both places Sunday night and Monday. A trade-wind disturbance is progressing westward from the date line this afternoon. It will arrive at the Marshall Islands later this evening. Anticipate increasing shower coverage near Majuro by midnight with isolated thunderstorms. After the passage of this disturbance on Monday night...much dryer northeast trades should dominate the Marshalls through midweek. For Kosrae and Pohnpei...this same disturbance will also bring showery conditions by Tuesday. A trade-wind surge expected to develop east of the date line early next week should cause trade-wind waves and swell to build across Kosrae and the Marshall Islands. Need to monitor for possible high surf and hazardous seas for small craft. && Western micronesia... Tropical Storm Maysak is expected to move close to and north of Chuuk. The closest Point of approach will be late tonight or early Sunday morning. A typhoon warning is in effect for Chuuk as Maysak intensifies to possibly a typhoon late tonight. 4 to 6 inches of rain are probable by Sunday evening. Increasing wind waves will combine with existing trade-wind swell to cause seas to build above 12 feet tonight through Sunday morning as Maysak moves through. Things should gradually improve Sunday afternoon and evening as Maysak departs the Chuuk area. However converging southeast winds will keep periodic showers around through Monday before surface ridging from the east finally introduces fairer weather on Tuesday. Showers might return near midweek as a trade disturbance approaches from near Pohnpei. A surface trough is coupling with a shear line to generate isolated convection over Yap. This convection is expected to reach Koror Sunday morning. As Tropical Storm Maysak moves toward the region on Monday...subsidence along with divergent surface winds to the west of the storm might provide a brief period of drier conditions for Koror and Yap. For Tuesday and Wednesday...stormy conditions are expected near Yap from Maysak. && Gum watches/warnings/advisories... GU...none. Marianas waters...Small Craft Advisory until 6 am chst Tuesday for pmz153-154. Small Craft Advisory from 6 am Sunday to 6 am chst Tuesday for pmz151-152. && $$ Ziobro/devita