Hurricane Rosa (2018)
Baja California Peninsula, Northwestern Mexico, Southwestern United States | |
IBTrACS / [1] | |
Part of the 2018 Pacific hurricane season |
Hurricane Rosa brought widespread flooding to northwestern
Rosa prompted the issuance of tropical storm watches and warnings along the coast of Baja California, as well as various flood watches and warnings throughout the Southwestern United States. The impact of Rosa was relatively minor, as a combination of wind shear and cooler seas had weakened the storm significantly by the time it made landfall. Widespread flooding throughout northwestern Mexico, mainly in Sonora and Baja California, led to one drowning and minor damage. In Arizona, rainfall peaked at 6.89 in (175 mm) and caused flash floods that killed two people. Flood damage from Rosa and its remnants totaled $50 million (2018 USD) in the Southwestern United States and $530,000 in Baja California.
Meteorological history
Hurricane Rosa originated from a vigorous
At the time of its formation, the depression was located within a favorable
After Rosa reached its peak, the hurricane's eyewall – an inner ring of clouds around the eye, marked by high winds – began to warm considerably, signaling the start of an eyewall replacement cycle.[9] Rosa turned to the northwest on the afternoon of September 28 in response to an approaching mid- to upper-level trough, which would continue to influence the remainder of the hurricane's development.[10] Now tracking over cooler seas, Rosa steadily weakened down to Category 2 by 00:00 UTC, September 29, while undergoing its eyewall replacement.[11] Once the replacement cycle was completed, the storm briefly restrengthened because of its much-improved structure, with expanding outflow to the northeast of the eye.[1][12] However, Rosa began to experience impinging wind shear from the developing trough, causing a misalignment between the upper and lower levels of the hurricane,[13] as well as coinciding with a final weakening phase.[1][13]
Rosa turned to the north on September 29, ahead of the trough.
Preparations, impact, and aftermath
Mexico
The
Because of its significant weakening before landfall, Rosa had a relatively minor impact in Mexico.
Farther south, in the state of Colima, floodwaters swept through the city of Manzanillo, causing sinkholes, rupturing underground pipes, and inundating buildings. Landslides in and around the city blocked roads and buried three vehicles in mud.[35] Throughout the state of Michoacán, the combined effects from Rosa and nearby Tropical Storm Sergio destroyed 86,000 acres (35,000 ha) of crops.[36] After Rosa's passage, states of emergency were issued for the cities of Ensenada, Mexicali,[25] and Puerto Peñasco.[33]
United States
Exiting the Gulf of California, the remnants of Rosa tracked northward, spawning showers and thunderstorms in the Four Corners region.[37] Damage from flooding in the Southwestern United States totaled about $50 million (USD).[38][39] Flood watches and warnings were issued on September 30 for Southern California, Arizona, southwest Colorado, Utah, central Nevada, and a small portion of southeast Idaho.[40] Rosa dropped 5.9 in (150 mm) of rain on a two week old, 240 sq mi (610 km2) burn scar in central Utah. Samples taken from streams that received rainfall from Rosa showed that the wildfires had lowered the level of carbon, nitrogen, and phosphorus.[41][42][43] On October 1, an interaction between Rosa's remnants and a Pacific low produced severe thunderstorms in San Bernardino County, California.[44] Surging floodwaters carried rocks onto portions of U.S. Route 95 and coated parts of state routes 62 and 127 in mud and debris.[34][44][45] Effects from the severe weather extended into Nevada, where flash floods inundated buildings and deposited rubble along Pioche's Main Street.[46]
By the time of Rosa's absorption on October 3, a total of 6.89 in (175 mm) of rain was recorded at Towers Mountain, Arizona, located about 85 mi (137 km) north of Phoenix; other areas throughout the state reported up to 5.5 in (140 mm) of rain.
At Menagers Dam near Sells, Arizona, rainfall from Rosa brought the water level within 1 foot (0.30 m) of maximum capacity on October 2, raising concerns about the dam's structural integrity.[51] Saying dam failure was imminent, the National Weather Service in Tucson urged residents of Ali Chuk to evacuate immediately.[52] Later that day, 162 people were evacuated from Ali Chuk, as well as 32 from Kohatk and 23 from the Menagers Dam community.[51] Engineers were recruited to carry out assessments of the dam,[53] and authorities continued to monitor the water level for two weeks before allowing residents to return to their homes on October 17.[54] Water discharge rates on the Salt River reached 25,000 cu ft (710 m3) per second, requiring officials to release water from the Tempe Town Lake.[55]
The Federal Highway Administration announced on September 10, 2019, that it was providing $4.7 million to the state of Arizona to fund road and bridge repairs required as a result of Rosa.[56] Road crews worked to repair a hillside along Arizona State Route 87 that was compromised as a result of heavy rainfall during Rosa. The project involved cleaning ditches, creating new ditches, removing landslide material, depositing boulders to prevent erosion, and repairing pavement; the cost was pegged at $4.2 million.[57]
See also
- Weather of 2018
- Tropical cyclones in 2018
- List of Category 4 Pacific hurricanes
- Other tropical cyclones named Rosa
- Lists of tropical cyclones by area:
- List of Baja California hurricanes
- List of Arizona hurricanes
- List of California hurricanes
- List of New Mexico hurricanes
- Hurricane Raymond (1989) – Category 4 hurricane that took a similar path, affected Baja California Sur as a tropical storm
- Hurricane Nora (1997) – Made landfall in Baja California as a Category 1 hurricane, and affected Arizona as a tropical storm
- Hurricane Javier (2004) – Category 4 hurricane that took a similar path, affected Baja California Sur as a tropical depression
References
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- ^ Blake, Eric (September 19, 2018). Tropical Weather Outlook [20:48 UTC, Wed Sep 19, 2018] (Report). NHC Graphical Outlook Archive. National Hurricane Center. Archived from the original on September 28, 2018. Retrieved September 26, 2018.
- ^ Zelinsky, David (September 22, 2018). Tropical Weather Outlook [23:24 UTC, Sat Sep 22, 2018] (Report). NHC Graphical Outlook Archive. National Hurricane Center. Archived from the original on September 28, 2018. Retrieved September 26, 2018.
- ^ Zelinsky, David (September 24, 2018). Tropical Weather Outlook [23:24 UTC, Mon Sep 24, 2018] (Report). NHC Graphical Outlook Archive. National Hurricane Center. Archived from the original on September 30, 2018. Retrieved September 26, 2018.
- ^ Cangialosi, John (September 25, 2018). Tropical Depression Twenty-E Discussion Number 1 (Report). National Hurricane Center. Archived from the original on January 31, 2019. Retrieved January 30, 2019.
- ^ Roberts, Dave (September 26, 2018). Hurricane Rosa Advisory Number 6 (Report). National Hurricane Center. Archived from the original on September 28, 2018. Retrieved September 27, 2018.
- ^ Roberts, Dave (September 26, 2018). Hurricane Rosa Discussion Number 6 (Report). National Hurricane Center. Archived from the original on February 1, 2019. Retrieved January 31, 2019.
- ^ Blake, Eric (September 28, 2018). Hurricane Rosa Discussion Number 12 (Report). National Hurricane Center. Archived from the original on November 5, 2018. Retrieved September 29, 2018.
- ^ Roberts, Dave (September 28, 2018). Hurricane Rosa Discussion Number 13 (Report). National Hurricane Center. Archived from the original on February 1, 2019. Retrieved January 31, 2019.
- ^ Zelinsky, David (September 28, 2018). Hurricane Rosa Discussion Number 14...Corrected (Report). National Hurricane Center. Archived from the original on September 30, 2018. Retrieved September 29, 2018.
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- ^ a b Beven, Jack (September 29, 2018). Hurricane Rosa Discussion Number 18 (Report). National Hurricane Center. Archived from the original on September 30, 2018. Retrieved September 29, 2018.
- ^ a b Stewart, Stacy (September 29, 2018). Hurricane Rosa Discussion Number 17 (Report). National Hurricane Center. Archived from the original on October 1, 2018. Retrieved January 31, 2019.
- ^ Stewart, Stacy (September 30, 2018). Hurricane Rosa Discussion Number 21 (Report). National Hurricane Center. Archived from the original on September 30, 2018. Retrieved September 30, 2018.
- ^ Pasch, Richard (September 30, 2018). Hurricane Rosa Discussion Number 22 (Report). National Hurricane Center. Archived from the original on September 30, 2018. Retrieved September 30, 2018.
- ^ Stewart, Stacy (September 30, 2018). Hurricane Rosa Discussion Number 20 (Report). National Hurricane Center. Archived from the original on October 10, 2021. Retrieved July 11, 2019.
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- ^ Johnson, Weldon B. (September 27, 2018). "Rosa is out there. Has a hurricane ever hit Arizona?". The Arizona Republic. Archived from the original on October 6, 2021. Retrieved July 2, 2019.
- ^ Cappucci, Matthew (October 1, 2018). "Southwest braces for Rosa's torrential rains". The Mercury News. Archived from the original on July 2, 2019. Retrieved July 2, 2019.
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- ^ Otto, Richard (October 2, 2018). Storm Summary Number 5 for Heavy Rainfall Associated with Rosa (Report). Weather Prediction Center. Archived from the original on February 3, 2019. Retrieved October 2, 2018.
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- ^ "Emiten alerta por llegada de 'Rosa' a Sonora y Baja California". Lopez-Doriga (in Spanish). September 30, 2018. Archived from the original on June 4, 2019. Retrieved June 4, 2019.
- ^ a b "Sigue alerta en Puerto de San Felipe por remanentes de 'Rosa'". Televisa News (in Spanish). October 2, 2018. Archived from the original on December 2, 2020. Retrieved June 5, 2019.
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- ^ "Precipitación acumulada (mm) el 1 de octubre de 2018 por el huracan Rosa" (Map). gob.mx (in Spanish). Conagua. Archived from the original on August 19, 2020. Retrieved March 12, 2019.
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- ^ "Las lluvias de 'Rosa' provocan inundaciones en Los Cabos". La Prensa (in Spanish). September 28, 2018. Archived from the original on September 29, 2018. Retrieved June 5, 2019.
- ^ a b Hernández, Tania Yamileth (October 3, 2018). "Declaran emergencia en Puerto Peñasco por "Rosa"". El Imparcial (in Spanish). Archived from the original on October 25, 2018. Retrieved October 25, 2018.
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person reportedly drowned in Mexico after being swept away by floodwaters.
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- ^ "'One of the rainiest days': Streets flooded, schools closed as Rosa takes toll on Arizona". 13wmaz. October 2, 2018. Archived from the original on August 19, 2020. Retrieved February 23, 2019.
- ^ Devereaux, Katie (October 5, 2018). "One dead after part of Highway 89 washed out". Arizona Daily Sun. Archived from the original on October 6, 2018. Retrieved October 6, 2018.
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- ^ a b "Southern Arizona dam holding as water recedes". New Haven Register. Associated Press. October 3, 2018. Archived from the original on October 5, 2018. Retrieved October 5, 2018.
- ^ NWS Tucson [@NWSTucson] (October 3, 2018). "Dam failure is imminent at Menegers Lake on the Tohono O'odham Nation. Evacuation per authorities is strongly advised for the village of Ali Chuk. #azwx" (Tweet). Retrieved October 5, 2018 – via Twitter.
- ^ Duarte, Carmen; Knott, Gloria (October 4, 2018). "Water levels drop, but tribal officials remain concerned Arizona dam could fail". Arizona Daily Star. Archived from the original on October 4, 2018. Retrieved October 5, 2018.
- ^ Radwany, Sam (October 17, 2018). "Some Tohono O'odham Nation evacuees finally returning home". Kgun 9. ABC. Archived from the original on August 19, 2020. Retrieved June 18, 2019.
- ^ Goldstein, Steve; Gilger, Lauren; Johnson, Nakiesha; Hernandez, Julian (25 September 2019). "Soggy Weather Has Much Of Arizona Under Flash Flood Watches". KJZZ. Associated Press. Archived from the original on 15 January 2022. Retrieved 21 January 2022.
- ^ "Tennessee to get $190 million in emergency relief funds for road and bridge repairs". WRCB Channel 3 News. 10 September 2019. Archived from the original on 5 March 2020. Retrieved 21 January 2022.
- ^ Bechman, Alexis (23 March 2021). "$4 million landslide stabilization project ongoing on State Route 87". Payson Roundup. Archived from the original on 23 March 2021. Retrieved 21 January 2022.
External links
- The National Hurricane Center's advisory archive on Hurricane Rosa
- The Weather Prediction Center's storm summary archive on Rosa
This article incorporates public domain material from websites or documents of the National Weather Service.