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Figure 11. SLOSH storm surge data posted by TPC/NHC at 9:20 a.m. CDT, August 28,
2005 lor Katrina based on 7 a.m. CDT, August 28 forecast track (denoted by black line).
Graphic shows the envelope of high water relative to mean sea level (NGVD 1929).
Maximum surge values of 22 feet arc shown in portions of Hancock and Harrison County, Mississippi.
FINDING 3: There is no proccss in place to notify NWS field oftlccs when the results from operational SLOSH storm surge runs are posted on their anonymous FTP server.
RECOMMENDATION 3A: TPC/NHC should provide notification to NWS field offices when the results from operational SLOSH storm surge runs are available on their anonymous FTP server.
RECOMMENDATION 3B: TPC/NHC should include a disclaimer statement on all operational SLOSH storm surge output made available through the anonymous FTP server that the information is for guidance purposes only and customers should refer to official NWS forecasts for official storm surge information.
On the evening of August 27, Max Mayfield, Director of NHC, contacted the Governor of Louisiana, the Governor of Mississippi, the Mayor of New Orleans, and the Alabama Emergency Management Agency to emphasize the severity of Katrina and its potential to cause a large loss of life (Best Practice). These calls had a profound effect on these officials and each mentioned it the following day during various press confcrenccs. The following morning, the Mayor of New Orleans declared a state of emergency and ordered the first-ever mandatory evacuation of the city. These calls were coordinated with the HLT, but the local WFOs were not aware of the coordination.
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