Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

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Last Map Update: Wed, Jan 21, 2026 at 4:26:32 pm AST

Watches, Warnings & Advisories

National Weather Service Miami - South Florida

National Weather Service Southern Region Headquarters

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Small Craft Advisory

Rip Current Statement

Breezy with Showers

Marine & Coastal Hazards

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[Jan 21st] 💨 Windy conditions will be the main concern today with a breezy to windy easterly flow, especially along windward coastal areas, pushing patches of moisture and resulting in passing showers across the islands. ⚠️ Unsecured items may be blown around. 🌧️ Variable weather will continue as fast-moving showers cross the region, with afternoon convection possible over interior to western Puerto Rico. [21 de enero] 🌬️ Las condiciones ventosas serán el principal riesgo hoy, con flujo del este de brisa fuerte a ventosa, especialmente en áreas costeras de barlovento, empujando parchos de humedad y provocando aguaceros pasajeros. ⚠️ Objetos no asegurados podrían salir volando. 🌧️ Tiempo variable continuará a medida que aguaceros de rápido movimiento crucen la región, con posible convección en la tarde sobre el interior y oeste de Puerto Rico. #PRwx #USVIwx

[Jan 21st] ⚠️HAZARDOUS MARINE AND COASTAL CONDITIONS⚠️ 🌊Small Craft Advisories and High Risk of Rip Currents in effect. ⚠️⛵Seas up to 6 to 9 feet. ⚠️🏊Breaking Waves up to 6 to 7 feet. [21 de ene] ⚠️CONDICIONES MARÍTIMAS Y COSTERAS PELIGROSAS⚠️ 🌊Advertencias para Embarcaciones Pequeñas y Riesgo Alto de Corrientes Marinas en efecto. ⚠️⛵Oleaje de hasta 6 a 9 pies. ⚠️🏊Olas Rompientes de hasta 6 a 7 pies. #PRwx #USVIwx

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

NWS San Juan, PR