Changes to the NWHHC forecasts for 2004

In 2004, NWHHC is making a few changes to the manner in which the forecasts are made. The first is that instead of the forecasts verifying at 3, 9, 15, and 21Z, the forecasts now are being verified at 0, 6, 12, and 18Z, which is consistent with synoptic time. The reason for this is so that the forecasts can be verified against the best track. The forecasts will still be released at the 3, 9, 15, and 21Z times; however, the initial time on these forecasts will be 0, 6, 12, and 18Z. The update times will remain 3, 9, 15, and 21Z, with the initial positions in these updates being the position at those respective times. This will create an inconsistency between the two products with regards to initial position. If there is a question as to where the cyclone is currently located, please use the update position as that will be the more up to date of the two products.

In addition, the forecast discussions are being expanded so that all eastern Pacific storms will now have forecast discussions prepared and released for them. The hope is that this will allow users greater insight into these cyclones and more information regarding any possible threats to land well in advance.

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