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| Dissipated = May 28, 2020
| Dissipated = May 28, 2020
| Extratropical = May 28
| Extratropical = May 28
| 1-min winds = 45
| 1-min winds = 50
| Damages = Minimal
| Damages = Minimal
| Pressure = 1004
| Pressure = 1004
| Fatalities = None
| Fatalities = None
| Areas = [[Florida]], [[South Carolina]],
| Areas = [[Florida]], [[South Carolina]], [[Pennsylvania]], [[North Carolina]], [[Virginia]], [[West Virginia]], [[The Bahamas]]
| Hurricane season = [[2020 Atlantic hurricane season]]
| Hurricane season = [[2020 Atlantic hurricane season]]
}}
}}

Revision as of 18:18, 29 May 2020

Tropical Storm Bertha
Tropical storm (SSHWS/NWS)
Bertha making landfall on the east coast of South Carolina near peak intensity on May 27
FormedMay 27, 2020
DissipatedMay 28, 2020
(Extratropical after May 28)
Highest winds1-minute sustained: 60 mph (95 km/h)
Lowest pressure1004 mbar (hPa); 29.65 inHg
FatalitiesNone
DamageMinimal
Areas affectedFlorida, South Carolina, Pennsylvania, North Carolina, Virginia, West Virginia, The Bahamas
Part of the 2020 Atlantic hurricane season

Tropical Storm Bertha was a short lived off-season tropical storm that impacted the U.S state of South Carolina on May 27th, 2020. [1] The storm and its precursor disturbance caused moderate flooding and Flash flooding to Florida, and South Carolina. Stormy weather caused the delay of the historic SpaceX's Falcon 9 launch.

Meteorological history

On May 25, the NHC began to track thunderstorms associated with an elongated surface trough located over Florida and the adjoining Atlantic Ocean for potential development into a tropical cyclone, but did not expect formation due to strong upper-level winds.[2] However, contrary to predictions, the system organized after moving northwards, which in turn was contributed to an increase convection and winds within the system. Based on NWS Doppler radar data from Charleston and buoy data, the NHC initiated advisories on Tropical Storm Bertha at 1200 UTC on May 27.[3] Bertha continued to strengthen despite its proximity to land.[4] One hour after the first advisory was issued, Bertha made landfall on the South Carolina coast with winds of 50 mph (80 km/h).[4] From formation until landfall, Bertha had an unusually small field of gale-force winds, stretching only 25 miles from the center.[5] Bertha began to weaken rapidly once inland, becoming a tropical depression just hours after landfall.[6] Bertha quickly degenerated to a post-tropical remnant over West Virginia at 9:00 UTC on May 28.[7]

The precursor disturbance to Tropical Storm Bertha caused a significant, multi-day rainfall event across South Florida, with accumulations of 8–10 in (200–250 mm) across several locations, and with a maximum 72-hour accumulation of 14.19 in (360 mm) in Miami.[8] Rainfall rates of 4 in (100 mm) an hour contributed to a 24-hour total of 7.4 in (190 mm) there, more than doubling the previous daily rainfall record and resulting in the city's most significant rain event in eight years.[9] In and around Miami, the rains contributed to the inundation of homes and roadways, especially in close proximity to canals.[10] Some homes even reported partial roof collapses throughout Hallandale Beach and Hollywood as a result of the heavy precipitation.[11] Local police in El Portal asked that the South Florida Water Management District open floodgates to relieve flooding in those canals.[12]

In Hialeah, several vehicles were stranded in flooded roadways, prompting several water rescues. The mayor asked residents to remain indoors accordingly.[10] Days of heavy rainfall prompted local National Weather Service offices to issue flash flood warnings, and sporadic severe thunderstorms prompted additional advisories. An EF1 tornado caused primarily tree and fencing damage in southern Miami, though several campers were also overturned.[13] Gusts associated with the disturbance in Florida topped out at 51 mph (82 km/h) near Key Biscayne, Florida.[14] Even as the system progressed north away from Florida, the outer fringes of Tropical Storm Bertha contributed to stormy weather across the state on May 27, forcing the cancellation of the planned Crew Dragon Demo-2 launch.[15]

References

  1. ^ "Tropical Storm BERTHA". www.nhc.noaa.gov. Retrieved 2020-05-27.
  2. ^ "NHC Graphical Outlook Archive". www.nhc.noaa.gov. Retrieved 2020-05-27.
  3. ^ "Tropical Storm BERTHA". www.nhc.noaa.gov. Retrieved 2020-05-27.
  4. ^ a b "Tropical Storm BERTHA". www.nhc.noaa.gov. Retrieved 2020-05-27.
  5. ^ "Tropical Storm BERTHA". www.nhc.noaa.gov. Retrieved 2020-05-28.
  6. ^ https://www.nhc.noaa.gov/text/refresh/MIATCPAT2+shtml/271746.shtml
  7. ^ https://www.nhc.noaa.gov/text/refresh/MIAWPCAT2+shtml/280835.shtml
  8. ^ 72-hour Precipitation Reports (Updated by County) (Report). Iowa Environmental Mesonet. May 27, 2020. Retrieved May 27, 2020. {{cite report}}: Unknown parameter |agency= ignored (help)
  9. ^ Lois Solomon; Victoria Ballard; Rafael Olmeda; Wayne Roustan (May 27, 2020). "Bertha downgraded to tropical depression; relentless rain to continue in saturated South Florida". Sun-Sentinel. Retrieved May 27, 2020.
  10. ^ a b Christian De La Rosa; Liane Morejon (May 26, 2020). "Steady downpours bring costly flooding across South Florida". WPLG. Retrieved May 27, 2020.
  11. ^ Liane Morejon; Janine Stanwood; Christian De La Rosa; Saira Anwer; Amanda Batchelor (May 25, 2020). "Flash flood warning in effect: South Floridians deal with rainfall, tornado, dangerous roads". WPLG. Retrieved May 27, 2020.
  12. ^ Brent Cameron; Sheldon Fox; Katrina Bush (May 26, 2020). "Flooded streets in Broward, Miami-Dade cause multiple cars to stall as storms batter South Florida". WSVN. Retrieved May 27, 2020.
  13. ^ NWS Damage Survey for 05/25/2020 Redlands Tornado Event Update 1 (Report). Iowa Environmental Mesonet. May 26, 2020. Retrieved May 27, 2020. {{cite report}}: Unknown parameter |agency= ignored (help)
  14. ^ 48-hour Highest Wind Reports (Report). Iowa Environmental Mesonet. May 26, 2020. Retrieved May 27, 2020. {{cite report}}: Unknown parameter |agency= ignored (help)
  15. ^ Jacob Bogage; Christian Davenport (May 27, 2020). "SpaceX's Falcon 9 rocket launch is scrubbed due to weather". The Washington Post. Retrieved May 27, 2020.
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