PC Weather Products - Slosh Index (original) (raw)

Slosh Data... what is it

The SLOSH Storm Surge data is compiled by the National Weather Service to assist emergency management officials determine the risk of hurricane related storm surge flooding in their area. It is analyzed and created by "slosh basin" and takes into consideration the coastal bathometry as well as the effects of water being funneled into certain areas of the coastline. The SLOSH analysis has been done for the most of the US Coastline, Puerto Rico and the US Virgin Islands. There are 2 types of analysis related to SLOSH.

MEOW - (Maximum Envelope of Water) and MOM (Maximum of Maximum)

The MEOW analysis represents the highest water due to a "family" of parallel tracks with the same direction, speed and intensity. The analysis is done for varying storm direction, speed of movement and category. For example a MEOW exist for a Cat 4 storm moving from the east at 12 mph into the Miami SLOSH basin.

The MOM data is the "Maximum of Maximum or "Meows Of Meows". Simply put the MOM data represents the highest water due to a composite of MEOWs or the "worst case scenario" for the entire Slosh basin.