Tropical Storm Fernand (2019)

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Tropical Storm Fernand
Tropical Storm Fernand off the coast of Tamaulipas on September 3
Meteorological history
FormedSeptember 3, 2019
DissipatedSeptember 5, 2019
Tropical storm
1-minute sustained (SSHWS/NWS)
Highest winds50 mph (85 km/h)
Lowest pressure1000 mbar (hPa); 29.53 inHg
Overall effects
Fatalities1 total
Damage$11.3 million (2019 USD)
Areas affectedNorthern Mexico, South Texas
IBTrACSEdit this at Wikidata
Part of the 2019 Atlantic hurricane season

Tropical Storm Fernand was a short-lived tropical storm that caused severe flooding in northern Mexico in early September 2019. The sixth named storm of the 2019 Atlantic hurricane season, Fernand developed from a broad area of low pressure that was first monitored in the southeastern Gulf of Mexico on August 31. Gradual organization ensued as the low moved westward, and it developed into a tropical depression early on September 3. The cyclone quickly strengthened into Tropical Storm Fernand six hours after formation, and attained peak winds of 50 mph (80 km/h) early on September 4. However, easterly wind shear and the cyclone's close proximity to the Mexican coast prevented further development, and Fernand weakened slightly before making landfall along the coast of northeastern Mexico at 15:15 UTC September 4. Fernand quickly weakened to a tropical depression as it moved over the Sierra Madre Oriental, and by 03:00 UTC on September 5, the cyclone had dissipated over the rugged terrain of Mexico. Fernand caused torrential, much-needed rainfall in Monterrey and other communities.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Early on August 31, 2019, the National Hurricane Center (NHC) began monitoring a broad area of low pressure located over the southeastern Gulf of Mexico for tropical cyclogenesis.[1] Slow, but steady development occurred as the low moved generally westward across the southern Gulf of Mexico. On September 2, shower and thunderstorm activity associated with the low became more concentrated, and the surface circulation became better defined. Although the disturbance still lacked a well-defined center by the following morning, the continued trend of organization and the system's threat to northeastern Mexico resulted in the issuance of advisories on Potential Tropical Cyclone Seven at 09:00 UTC September 3.[2] Shortly thereafter, first-light visible satellite images indicated the presence of a well-defined center of circulation, signifying the formation of a tropical depression at 15:00 UTC.[3] The cyclone continued to become better organized, and scatterometer data from 16:00 UTC that day revealed an area of tropical storm-force winds to the west of the center. Based on this data, the NHC upgraded the depression to Tropical Storm Fernand at 18:00 UTC on September 3.[4]

Fernand continued to quickly strengthen as it moved westward, and by 03:00 UTC on September 4, it attained its peak intensity with maximum sustained winds of 50 mph (80 km/h), as evidenced by an

Hurricane hunter aircraft investigating the system. Although the cyclone was forecast to strengthen further before reaching the Mexican coast, the effects of moderate easterly to southeasterly wind shear and the entrainment of dry air into the storm's circulation prevented further intensification.[5] By mid-day on September 4, much of the associated convection had moved inland over Mexico, and Fernand weakened slightly before making landfall on the northeastern coast of Mexico at around 15:15 UTC about 35 miles (56 km) north of La Pesca with maximum sustained winds of 45 mph (72 km/h).[6] Just hours after moving inland, the surface circulation of Fernand quickly became poorly defined, and the cyclone weakened to a tropical depression at 21:00 UTC on September 4.[7] Weakening continued as Fernand moved further inland, and at 03:00 UTC on September 5, the cyclone dissipated over the very rugged terrain of the Sierra Madre Oriental.[8]

Preparations and impact

Mexico

Upon the initiation of advisories on Potential Tropical Cyclone Seven early on September 3, the

Government of Mexico issued a tropical storm warning for La Pesca northward to Barra El Mezquital in northeastern Mexico.[9] The warning was extended northward to the mouth of the Rio Grande river and southward to Barra del Tordo at 18:00 UTC with the designation of Tropical Storm Fernand.[10] In preparation for the storm, the Mexican government activated Plan DN-III-E, sending 4,000 troops to the northeastern states to assist in disaster relief.[citation needed
]

Fernand produced torrential rainfall across much of northeastern Mexico, including the states of

La Huasteca also required rescue after being caught in the strong current of the floodwaters.[13] On September 7, Governor of Nuevo León Jaime Rodríguez Calderón declared a state of emergency for Nuevo León, further announcing that he would request funding and resources from the National Disaster Fund to aid in repairs and relief efforts.[14] Initial damage in Nuevo León was estimated to be MX$7.5 billion (US$383 million). Two months later, the National Civil Protection found that the damage in Nuevo León was just MX$222 million (US$11.3 million), much less than the initial estimation.[15]

United States

Although the center of Fernand remained over northeastern Mexico, the storm's outer rainbands brought much-needed rainfall to portions of drought-stricken

Corpus Christi area in the outer bands.[17][18]

See also

References

  1. ^ Robbie J. Berg (August 31, 2019). "Five-Day Graphical Tropical Weather Outlook". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  2. ^ Stacy R. Stewart (September 3, 2019). "Potential Tropical Cyclone Seven Advisory Number 1". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  3. ^ John L. Beven II (September 3, 2019). "Tropical Depression Seven Discussion Number 2". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  4. ^ John L. Beven II (September 3, 2019). "Tropical Storm Fernand Discussion Number 3". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  5. ^ Lixion A. Avila (September 4, 2019). "Tropical Storm Fernand Discussion Number 4". Miami, Florida: National Hurricane Center. Retrieved September 9, 2019.
  6. ^ Daniel P. Brown (September 4, 2019). "Tropical Storm Fernand Tropical Cyclone Update". Miami, Florida: National Hurricane Center. Retrieved September 9, 2019.
  7. ^ David Zelinsky (September 4, 2019). "Tropical Depression Fernand Discussion Number 7". Miami, Florida: National Hurricane Center. Retrieved September 9, 2019.
  8. ^ John P. Cangialosi (September 5, 2019). "Remnants of Fernand Discussion Number 8". Miami, Florida: National Hurricane Center. Retrieved September 9, 2019.
  9. ^ Stacy R. Stewart (September 3, 2019). "Potential Tropical Cyclone Seven Advisory Number 1". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  10. ^ John L. Beven II (September 3, 2019). "Tropical Storm Fernand Intermediate Advisory Number 2A". Miami, Florida: National Hurricane Center. Retrieved September 8, 2019.
  11. ^ "Fernand provocó daños por 7.500 millones de pesos en Nuevo León". Infobae. September 7, 2019. Retrieved September 8, 2019.
  12. ^ "Minuto a minuto: Fernand azota Monterrey con lluvias torrenciales y deja un muerto". Infobae. September 4, 2019. Retrieved September 7, 2019.
  13. ^ "Un taxista desafió a la tormenta tropical Fernand y fue arrastrado por la corriente de agua en Nuevo Léon". Infobae. September 5, 2019. Retrieved September 9, 2019.
  14. ^ "Pedirá Estado declaratoria de emergencia para la mitad de los municipios tras el paso de 'Fernand'". Telediario. September 6, 2019. Retrieved September 7, 2019.
  15. ^ Recio, Kevin (November 15, 2019). "Daños por 'Fernand' cierran en 221.9 mdp". ABC Noticias. Archived from the original on June 8, 2020. Retrieved November 16, 2019.
  16. ^ Laura B. Martinez (September 4, 2019). "Rains help with dry conditions". Brownsville Herald. Retrieved September 9, 2019.
  17. ^ Laura B. Martinez (September 3, 2019). "Storm brings needed rainfall; Forecast calls for possible flooding". Brownsville Herald. Retrieved September 9, 2019.
  18. ^ "Tropical Storm Fernand will bring rain to South Texas today". September 4, 2019. Retrieved August 5, 2020.

External links

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