Hurricane Boris (1996)

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Hurricane Boris
Category 1 hurricane (SSHWS/NWS)
Boris 29 june 1996 1956Z.jpg
Boris at landfall.
FormedJune 27, 1996
DissipatedJuly 1, 1996
Highest winds1-minute sustained: 90 mph (150 km/h)
Lowest pressure979 mbar (hPa); 28.91 inHg
Fatalities10 direct
Areas affectedMexico
Part of the 1996 Pacific hurricane season

Hurricane Boris was a deadly storm. It was the fourth cyclone of the 1996 Pacific hurricane season, formed on June 27. During the overnight hours, the depression became Tropical Storm Boris. Shortly thereafter, Boris rapidly strengthened into a hurricane. Just as an eye began to form, Boris made landfall in Mexico with peak winds of 85 mph (140 kn/h). It rapidly weakened and dissipated on July 1. Boris caused heavy flooding in southern Mexico. Ten deaths were reported. Damage is unknown.

Meteorological history[change | change source]

Storm path

Boris originated from a tropical wave that moved off Africa on June 8.[1] It passed near the Cape Verde Island with no convection. It crossed Central America on June 23.[1] The wave was very poorly defined on satellite imagery for many days. The first signs of a circulation on satellite imagery appeared on the 26th, centered about 250 miles south of the Gulf of Tehuantepec. The system became a tropical depression on the 27th when convective banding increased around the center.[1]

At its first advisory, it was noted that it get better organized.[2] At that time, tropical storm warnings went up for Mexico.[2] It was also noted the Aviation model forecast Tropical Depression Four-E to make landfall in Mexico as a weak tropical storm in 12 hours.[2] Around that time, the forecast track was issued by the National Hurricane Center late on June 27 stating that it would receive an outflow from close by Hurricane Alma.[2] At the same time the Ukmet model had Tropical Depression Four-E remaining offshore Mexico.[2] The same model also had the depression becoming Tropical Storm Boris.[2] The National Hurricane Center forcasted Tropical Depression Four-E to become Tropical Storm Boris and make landfall in Mexico with winds of 50 nmi (93 km).[2] In the same advisory, it was noted that the outer rain bands of brand new Tropical Depression Four-E had moved onshore Mexico.[2]

The tropical cyclone moved northwestward at 8 to 10 knots for the next two days and strengthened from 25 knots to 80 knots during a 36-hour period, with a ragged eye appearing on satellite imagery just before landfall on the afternoon of June 29 at a peak intensity of 85 nmi (157 km), making Boris a moderate Category 1 hurricane.[1] The center crossed the south coast of Mexico midway between Lazaro Cardenas and Acapulco.[1] Boris quickly weakened to a depression and turned southwestward in response to a building ridge to its north.[1] The system was disrupted by the mountainous terrain of Mexico and dissipated on the July 1 after moving back over water just south of Puerta Vallarta.[1]

Preparations, impact, and aftermath[change | change source]

Hurricane Boris was, in general, a well-forecast storm. Due to the short time when the system was at or above tropical storm intensity, long-range forecasts were not verified. The average errors were 101 nmi (187 km) at one and a half days in the future.[1] As Hurricane Boris was approaching Mexico, a tropical storm watch was issued for the coast between Manzanillo and Puerto Escondido on June 28. From Manzanillo to Puerto Maldonado, the tropical storm replaced with a hurricane warning the same day.[1]

Deaths and damage[change | change source]

Boris caused ten deaths.[1]

  • Nearby, three other people drowned and five fishermen went missing.
  • Rain was heavy throughout the impacted region, with the highest totals in Guerrero. A total of 12.16 in was recorded in Coyuca de Benítez.[1] The highest total was 14.98 in at Paso de San Antonio, to the east of the point of landfall.[3] Those rains caused a flood on the San Jeronimo River, which left at least 5,000 homeless.
  • Tecpan bore the brunt of the storm, reporting heavy damage.[4] For example:[1]
    • A countless number of homes were washed away
    • At least one person was killed
    • The storm also flooded lobbies of hotels along the coast
  • In Acapulco:
    • A child was killed when a roof collapsed.[1]
    • Strong surf pushed fishing boats against a sea wall. Trees were knocked down, and business signs were blown down. Streets were flooded to the level of hubcaps.[5] A total of about 10,000 people were left homeless, and at least 70 people were injured.[6] Approximately 12 boats were sunk offshore.

Related pages[change | change source]

References[change | change source]

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Miles Lawrence (1996-08-15). "Hurricane Boris". National Hurricane Center. Retrieved 2007-08-18.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Franklin (1996-6-27). "Tropical Storm Warning issued for Mexico". National Hurricane Center. Retrieved 2008-11-23. Check date values in: |date= (help)
  3. "Hurricane Boris". Hydrometeorological Prediction Cente. 2007. Retrieved 2007-02-15.
  4. Staff Writer (1996). "Hurricane Boris Heads to Sea After Ravaging Mexico". Contra Costa Times. Retrieved 2008-10-27. Italic or bold markup not allowed in: |publisher= (help)
  5. Associated Press (1996). "Hurricane Boris strikes Mexico". The Kansas City Star. Retrieved 2008-10-27.
  6. Staff Writer (1996). "Hurricane Boris kills 4, injures 70". Pittsburgh Post-Gazette. Retrieved 2008-10-27.

Tropical cyclones of the 1996 Pacific hurricane season

Saffir–Simpson Hurricane Scale
TD TS C1 C2 C3 C4 C5
Note: Entries * refer to the Central Pacific System