Past storm
Post-Tropical Cyclone Boris
Final/remnant updateBoris reached tropical-storm strength with peak sustained winds of 40 kt. The final NHC advisory reported that Boris had decayed to a remnant low over southern Mexico at 25 kt on June 9, 2026, while heavy-rain and flooding concerns continued.
Boris advisory updated:
Key Facts
- Type
- Post-Tropical
- Max sustained wind
- 29 mph
- Min pressure
- 1004 mb
- Movement
- NW 7 mph
- Type
- Post-Tropical
- Max sustained wind
- 29 mph
- Min pressure
- 1004 mb
- Movement
- NW 7 mph
Final Official Position
Historical storm: Boris occurred before BajaStorms launched. A complete interactive forecast was not captured. This map shows the storm's final official NHC position.
BorisTypePost-TropicalMax sustained wind29 mph
Final position shown using official data from NOAA / National Hurricane Center (NHC).
Official Graphics
GFSGFS ensemble meanHAFS-AHAFS-BHMONHCCA consensus
BajaStorms graphicSource: NOAA/NHC ATCF A-deck ↗
Constructed guidance: Not the official NHC forecast
Advisory Timeline
Advisory Timeline #10
Boris decays to a remnant low over southern Mexico. Flash flooding threat forecast to continue through today.
Official NHC advisory text
ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Post-Tropical Cyclone Boris Advisory Number 10 NWS National Hurricane Center Miami FL EP022026 900 AM CST Tue Jun 09 2026 ...BORIS DECAYS TO A REMNANT LOW OVER SOUTHERN MEXICO... ...FLASH FLOODING THREAT FORECAST TO CONTINUE THROUGH TODAY... SUMMARY OF 900 AM CST...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...16.9N 98.9W ABOUT 65 MI...105 KM E OF ACAPULCO MEXICO ABOUT 45 MI...75 KM NNW OF PUNTA MALDONADO MEXICO MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 AM CST (1500 UTC), the center of Post-Tropical Cyclone Boris was located near latitude 16.9 North, longitude 98.9 West. The post-tropical cyclone is moving toward the northwest near 7 mph (11 km/h), and a west-northwestward motion is expected to continue today. Maximum sustained winds are now near 30 mph (45 km/h) with higher gusts. Boris is forecast to dissipate over the mountains of southern Mexico later today or tonight. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Boris can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC. RAINFALL: The remnants of Boris are expected to produce additional rainfall totals of 1 to 4 inches across coastal portions of the Mexican states of Guerrero and Oaxaca today. Some risk of additional flooding and mudslides continues this morning, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Tropical Storm Boris, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep2.shtml?rainqpf WIND: Wind gusts to tropical-storm force will continue along portions of the coast of southern Mexico for a few more hours. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on this system. For information regarding the ongoing threat of heavy rainfall, please see forecasts and warnings from the Meteorological Service of Mexico. $$ Forecaster Beven NNNN
Source: NOAA / NHC
Advisory Timeline #9
Boris moves inland over southern Mexico. Flash flooding threat forecast to continue through today.
Official NHC advisory text
ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Boris Advisory Number 9 NWS National Hurricane Center Miami FL EP022026 300 AM CST Tue Jun 09 2026 ...BORIS MOVES INLAND OVER SOUTHERN MEXICO... ...FLASH FLOODING THREAT FORECAST TO CONTINUE THROUGH TODAY... SUMMARY OF 300 AM CST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...16.4N 98.4W ABOUT 105 MI...170 KM ESE OF ACAPULCO MEXICO ABOUT 15 MI...25 KM ENE OF PUNTA MALDONADO MEXICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NNW OR 340 DEGREES AT 6 MPH...9 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Laguna de Chacahua to Tecpan de Galeana A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 300 AM CST (0900 UTC), the center of Tropical Storm Boris was located near latitude 16.4 North, longitude 98.4 West. Boris is moving toward the north-northwest near 6 mph (9 km/h). A turn toward the northwest and an increase in forward speed is expected early this morning. On the forecast track, the center of Boris will move farther inland over eastern Guerrero this morning. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Rapid weakening is expected, and Boris is forecast to dissipate this afternoon. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Boris can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC. RAINFALL: Boris is expected to produce additional rainfall totals of 1 to 4 inches across coastal portions of the Mexican states of Guerrero and Oaxaca today. Some risk of additional flooding and mudslides continues this morning, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Tropical Storm Boris, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep2.shtml?rainqpf WIND: Tropical storm conditions are likely occurring along the coast in the warning area and will continue through early this morning. NEXT ADVISORY ------------- Next intermediate advisory at 600 AM CST. Next complete advisory at 900 AM CST. $$ Forecaster Hagen NNNN
Source: NOAA / NHC
Advisory Timeline #8
Boris closing in on the southern mexican coastline. Likely to produce life-threatening flash flooding through tuesday.
Official NHC advisory text
ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Boris Advisory Number 8 NWS National Hurricane Center Miami FL EP022026 900 PM CST Mon Jun 08 2026 ...BORIS CLOSING IN ON THE SOUTHERN MEXICAN COASTLINE... ...LIKELY TO PRODUCE LIFE-THREATENING FLASH FLOODING THROUGH TUESDAY... SUMMARY OF 900 PM CST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...16.0N 98.3W ABOUT 125 MI...200 KM ESE OF ACAPULCO MEXICO ABOUT 30 MI...45 KM SE OF PUNTA MALDONADO MEXICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 2 MPH...4 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Laguna de Chacahua to Tecpan de Galeana A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case over the next 12 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 900 PM CST (0300 UTC), the center of Tropical Storm Boris was located near latitude 16.0 North, longitude 98.3 West. Boris is moving toward the north near 2 mph (4 km/h), and a turn toward the northwest and an increase in forward speed is expected overnight. On the forecast track, the center of Boris should reach the coast of Oaxaca and Guerrero, Mexico, late tonight into Tuesday morning. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Little change in strength is forecast until landfall. Rapid weakening will occur after the center crosses the coast of southern Mexico. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1001 mb (29.56 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Boris can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC. RAINFALL: Boris is expected to produce additional rainfall totals of 3 to 6 inches, with maximum totals of 8 inches possible across coastal portions of the Mexican states of Guerrero and Oaxaca through Tuesday. This rainfall may produce life-threatening flooding and mudslides, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Tropical Storm Boris, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep2.shtml?rainqpf WIND: Tropical storm conditions are likely occurring along the coast in the warning area and will continue into early Tuesday. NEXT ADVISORY ------------- Next intermediate advisory at 1200 AM CST. Next complete advisory at 300 AM CST. $$ Forecaster Adams/Papin NNNN
Source: NOAA / NHC
Advisory Timeline #7
Boris bringing flooding rains to portions of southern Mexico.
Official NHC advisory text
ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Boris Advisory Number 7 NWS National Hurricane Center Miami FL EP022026 300 PM CST Mon Jun 08 2026 ...BORIS BRINGING FLOODING RAINS TO PORTIONS OF SOUTHERN MEXICO... SUMMARY OF 300 PM CST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...15.5N 99.0W ABOUT 115 MI...185 KM SSE OF ACAPULCO MEXICO ABOUT 60 MI...100 KM SSW OF PUNTA MALDONADO MEXICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NE OR 50 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Laguna de Chacahua to Tecpan de Galeana A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12 to 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 300 PM CST (2100 UTC), the center of Tropical Storm Boris was located near latitude 15.5 North, longitude 99.0 West. Boris is moving toward the northeast near 3 mph (6 km/h) and a turn toward the north is expected later today followed by a turn to the northwest on Tuesday. On the forecast track, the center of Boris should reach the coast of Guerrero, Mexico, by early Tuesday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Little change in strength is forecast until landfall. Rapid weakening will occur after the center crosses the coast of southern Mexico. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1001 mb (29.56 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Boris can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC. RAINFALL: Boris is expected to produce additional rainfall totals of 3 to 6 inches, with maximum totals of 8 inches possible across coastal portions of the Mexican states of Guerrero and Oaxaca through Tuesday. This rainfall may produce life-threatening flooding and mudslides, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Boris, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep2.shtml?rainqpf WIND: Tropical storm conditions are expected to begin along the coast within the warning area tonight or early Tuesday. NEXT ADVISORY ------------- Next intermediate advisory at 600 PM CST. Next complete advisory at 900 PM CST. $$ Forecaster Pasch NNNN
Source: NOAA / NHC
Advisory Timeline #6
Center of Boris is farther south than previously estimated. Now expected to make landfall on tuesday.
Official NHC advisory text
ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Boris Special Advisory Number 6 NWS National Hurricane Center Miami FL EP022026 1200 PM CST Mon Jun 08 2026 ...CENTER OF BORIS IS FARTHER SOUTH THAN PREVIOUSLY ESTIMATED... ...NOW EXPECTED TO MAKE LANDFALL ON TUESDAY... SUMMARY OF 1200 PM CST...1800 UTC...INFORMATION ----------------------------------------------- LOCATION...15.3N 99.2W ABOUT 120 MI...195 KM SSE OF ACAPULCO MEXICO ABOUT 80 MI...130 KM SSW OF PUNTA MALDONADO MEXICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...ENE OR 60 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Laguna de Chacahua to Tecpan de Galeana A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12 to 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1200 PM CST (1800 UTC), the center of Tropical Storm Boris was located near latitude 15.3 North, longitude 99.2 West. Boris is moving toward the east-northeast near 3 mph (6 km/h) and a turn toward the north is expected later today followed by a turn to the northwest on Tuesday. On the forecast track, the center of Boris should reach the coast of Guerrero, Mexico, on Tuesday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Little change in strength is forecast until landfall. Rapid weakening will occur after the center crosses the coast of southern Mexico. Tropical-storm-force winds extend outward up to 35 miles (55 km) from the center. The estimated minimum central pressure is 1001 mb (29.56 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Boris can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP2 and WMO header WTPZ42 KNHC. RAINFALL: Boris is expected to produce additional rainfall totals of 4 to 8 inches, with maximum totals of 12 inches possible across coastal portions of the Mexican states of Guerrero and Oaxaca through Tuesday. This rainfall may produce life-threatening flooding and mudslides, especially in areas of steep terrain. For a complete depiction of forecast rainfall associated with Boris, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_ep2.shtml?rainqpf WIND: Tropical storm conditions are expected to begin along the coast within the warning area tonight or early Tuesday. NEXT ADVISORY ------------- Next intermediate advisory at 1200 PM CST. Next complete advisory at 300 PM CST. $$ Forecaster Pasch NNNN
Source: NOAA / NHC