National Weather Service United States Department of Commerce

Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

WFO PHI Weather Product Criteria

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-- Convective:
  Special Marine Warning
  Marine Weather Statement

-- Non-Convective Winds:
  Hurricane-Force Wind Watch/Warning
  Storm Watch/Warning
  Gale Watch/Warning
  Small Craft Advisory

-- Freezing Spray:
  Heavy Freezing Spray Watch/Warning
  Freezing Spray Advisory

-- Surf Zone Products:
  High Surf Advisory
  High Rip Current Risk

-- Fog:
  Dense Fog Advisory

-- Low Water:
  Low Water Advisory
  Special Weather Statement

-- Coastal Flooding:
  Coastal Flood Watch/Warning
  Coastal Flood Advisory
  Coastal Flood Statement
NWS Philadelphia/Mount Holly

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