National Weather Service United States Department of Commerce

More Heavy Rain and Severe Thunderstorms Forecast for Central U.S. Wednesday Night into Thursday

Parts of Oklahoma, Kansas and Missouri which saw 3+ inches of rain to begin this week are forecast to see potentially another inch or more Wednesday night as another front sets up over the area. Along with the heavy rain, severe thunderstorms will again be possible with large hail the main threat. Severe thunderstorms will then take aim on parts of the Southern Plains and Northeast Thursday. Read More >

FXZS60 NSTU 220100

Area Forecast Discussion
National Weather Service Pago Pago AS
200 PM SST Tue May 21 2019

The latest IR satellite loop shows area of convention that was
persistent over Samoa earlier this afternoon, diminishing
(warming cloud top temps) as it moves toward American Samoa into
this evening. Satellite trends and model data would suggest only
scattered rain showers across American Samoa tonight with better
chance for rain showers through the end of the work week as
several weak surface troughs pass near the islands. Low level 2m
temperature profiles suggest nearly persistent daytime
temperatures warming through the mid 80s through Friday with
overnight lows in the mid 70s.

Slightly cooler temperatures can be expected during the weekend
with afternoon readings in the lower 80s, along with limited
chances for rain showers as mid and upper level moisture
diminishes slightly. A better chance for rain showers on Tuesday
as another trough passes near the islands.


Will issue small craft advisory for the marine waters as wave
watch III model data shows significant wave heights increasing
through Wednesday night, generating seas to between 8 and 10
feet. Additionally, will issue a high surf advisory, as wave watch
III data shows rapidly increasing swell wave period increasing to
between 14 and 17 seconds on building seas.


Small craft advisory is in effect.
High surf advisory in in effect.