San Francisco, CA Storm Center: Alert Detail

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Storm Center: Weather Alerts: Warnings

My Location: San Francisco, CA

Current Time: 09:55:19 AM PDT


	Other Alerts

Weather Alert

		Other Weather Alerts
Type	Special Weather Statement
Issued By	NWS Tiyan GU
Issuing Time	Wed, 23 Jul 2025 02:46:00 PDT
Broadcast Time	Wed, 23 Jul 2025 02:46:00 PDT
Valid Until	Wed, 23 Jul 2025 23:15:00 PDT
Brief Description	Special Weather Statement
Detailed Description	The Joint Typhoon Warning Center has issued a Tropical Cyclone Formation Alert for Invest 98W, centered near 12.9N, 145.0E, meaning that 98W is expected to develop into a significant tropical cyclone (Tropical Depression) within 24 hours. As 98W pushes across the southern Marianas and then off to the north and west of the islands over the next couple of days, a strong southwest monsoon surge is expected to develop across the Marianas in its wake. Heavy rainfall and breezy to windy conditions are expected across the Marianas through Saturday with the passage of 98W and the ensuing monsoon surge. Rainfall amounts of 6 to 12 inches are possible across the region through Saturday night, with locally higher amounts also possible. With the expected prolonged and heavy rainfall over the coming days, there will be a growing concern for mudslides potential. A Flood Watch is in effect through Saturday night. Winds and seas will become hazardous to small craft, with winds 20 to 30 kt and gusts to 40 kt and seas 8 to 12 feet anticipated by Thursday night. A Small Craft Advisory is in currently in effect for Tinian and Saipan, and will begin for Guam and Rota beginning Thursday morning, continuing through Saturday night. Surf is expected to rise along east and south facing reefs first beginning Thursday, then transition to south and west facing reefs as 98W pushes to the northwest and the southwesterly monsoon intensifies in its wake. This will cause the surf and risk of rip currents to rise along south and west facing reefs as surf will exceed the 9 foot threshold. Surf and rip risk look to remain hazardous through much of the weekend. For more information on Invest 98W (TCFA), see bulletins issued by JTWC under WMO header WTPN21 PGTW. Residents across the Marianas should continue monitoring local weather forecasts from the National Weather Service in Guam, and for additional information from your local emergency management office. Visit weather.gov/gum for the latest weather information from the National Weather Service.

All Alerts

Region	Alert
Minnesota	Flash Flood Warning (3)
Missouri	Flood Warning (11)
Illinois	Flood Warning (8)
South Dakota	Flood Warning (2)
Kansas	Flood Warning (9)
Arkansas	Flood Warning (4)
Minnesota	Flood Warning (5)
Iowa	Flood Warning (7)
Georgia	Flood Warning
Texas	Flood Warning (2)
Minnesota,South Dakota	Severe Local Storm Watch or Watch Cancellation
Kansas,Missouri	Public Severe Weather Alert (6)
Alabama,Tennessee	Public Severe Weather Alert (18)
Arkansas,Oklahoma	Public Severe Weather Alert (12)
Louisiana,Texas	Public Severe Weather Alert (5)
New York	Public Severe Weather Alert (3)
Ohio	Public Severe Weather Alert
Illinois,Indiana,Kentucky	Public Severe Weather Alert (65)
Iowa,Minnesota,Wisconsin	Public Severe Weather Alert (33)
Connecticut,Massachusetts,Rhode Island	Public Severe Weather Alert (2)
Mississippi	Public Severe Weather Alert (7)
Michigan	Public Severe Weather Alert (3)
Delaware	Coastal Flood Warning, Watch, or Statement (5)
New Jersey,Pennsylvania	Coastal Flood Warning, Watch, or Statement (3)
Hawaii	Coastal Flood Warning, Watch, or Statement (4)
Alaska	Coastal Flood Warning, Watch, or Statement (6)
Minnesota	Coastal Flood Warning, Watch, or Statement (3)
California	Coastal Flood Warning, Watch, or Statement (2)
Guam,Mauritius	Flood Statement (2)
Minnesota,Wisconsin	Flood Statement (14)
Alaska	Flood Statement (3)
Guam,Mauritius	Special Weather Statement
Minnesota	Special Weather Statement (2)
Indiana,Kentucky	Air Stagnation Advisory (10)
Ohio	Air Stagnation Advisory (6)
Minnesota	Air Stagnation Advisory
Louisiana,Mississippi	Non Precipitation Warning, Watch, or Statement (22)
Arkansas	Non Precipitation Warning, Watch, or Statement (16)
Illinois,Kentucky,Missouri	Non Precipitation Warning, Watch, or Statement (45)
California,Oregon	Non Precipitation Warning, Watch, or Statement (5)
South Dakota	Non Precipitation Warning, Watch, or Statement
Iowa,Illinois,Missouri	Non Precipitation Warning, Watch, or Statement (12)
Wisconsin	Non Precipitation Warning, Watch, or Statement (4)
Kansas,Missouri	Non Precipitation Warning, Watch, or Statement (19)
Pamlico Sound - North Carolina,Southeast Coast (Atlantic) from NC south; Puerto Rican Waters; Caribbean Sea; Southwest North Atlantic	Marine Weather Statement (29)
Tinian Coastal Waters,Saipan Coastal Waters	Marine Weather Statement
Guam Coastal Waters,Rota Coastal Waters	Marine Weather Statement
Guam,Mauritius	Marine Weather Statement
Michigan	Marine Weather Statement (5)
Coastal California	Marine Weather Statement
Coastal California	Marine Weather Statement
Coastal North Carolina	Marine Weather Statement (3)
Lake Michigan - Wisconsin	Marine Weather Statement (15)
Lake Michigan - Michigan,Lake Michigan	Marine Weather Statement (17)
Coastal Washington,Strait of Juan de Fuca - Washington	Marine Weather Statement
Lake Huron	Marine Weather Statement (3)
South Carolina	Marine Weather Statement
Coastal Louisiana-Mississippi	Marine Weather Statement
Lake Superior - Minnesota,Lake Superior - Wisconsin,Lake Superior; St. Marys River	Marine Weather Statement
Coastal Washington,Strait of Juan de Fuca - Washington	Marine Weather Statement
Coastal Washington,Strait of Juan de Fuca - Washington	Marine Weather Statement
Alaska	River Statement

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