Status: Ongoing analysis Material from: Linus


 


1. Impact

The tropical cyclone Iota made landfall on the east-coast of Nicaragua, close to the boarder of Honduras on 17 November. The cyclone intensified before landfall was a Category 4/5 according to NHC. After landfall, the cyclone caused flash floods and landslides. The soil was already wet after the landfall of ET Eta two weeks prior. 

https://en.wikipedia.org/wiki/Hurricane_Iota

Some information in Spanish:

https://humboldt.org.ni/wp-content/uploads/2020/11/Reporte_informativo_Tormenta-Tropical_IOTA_N_05-.pdf

2. Description of the event


3. Predictability

  

3.1 Data assimilation

 

3.2 HRES


3.3 ENS

The plots below show tropical cyclone tracks (ensemble - grey, CF - blue, HRES - red, obs - black) and positions on 17 Nov 00UTC (symbols coloured by intensity) for forecasts with different initial times (latest in first panel).

The plots below show time-series of central pressure (top), maximum wind speed (middle) and propagation speed (bottom) for the forecasts from 16 Nov 00UTC (left), 15 Nov 00UTC (middle) and 14 Nov 00UTC (right).

3.4 Monthly forecasts



3.5 Comparison with other centres

The plots below show tropical cyclone tracks (ensemble - grey, CF - blue, HRES - red, obs - black) and positions on 17 Nov 00UTC (symbols coloured by intensity) for forecasts initialised 16 Nov 00TUC from ECMWF (left), NCEP (middle) and UKMO (right).

Same as above but for forecasts from 15 Nov 00UTC.


Same as above but for forecasts from 14 Nov 00UTC.


4. Experience from general performance/other cases


5. Good and bad aspects of the forecasts for the event


6. Additional material


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