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920 mb. This is the third lowest central pressure of a land-falling hurricanc in the U.S. (Table 2).
HURRICANE	YEAR	MINIMUM PRESSURE AT LANDFALL
Labor Day Hurricane (FL Keys)	1935	892 mb
Hurricane Camille (SE LA/MS)	1969	909 mb
Hurricane Katrina (SE LA/MS)	2005	920 mb
Hurricane Andrew (SE FL)	1992	922 mb
Indianola (TX)	1919	925 mb
Table 2. The five most intense hurricanes (based on central pressure) to make landfall in the U.S.
1851-2005.
Katrina then moved ashore near the Louisiana and Mississippi border around 9:45 a.m. CDT as a Category 3 hurricanc with estimated sustained winds of 120 mph and a minimum central pressure of 928 mb. Katrina weakened to a tropical storm by 7 p.m. CDT, August 29, while loeated just north of Laurel, MS. Over the next two days, the storm moved north through the lower Mississippi Valley into the Ohio River Valley region spreading destructive winds and spawning tornadoes. Katrina was downgraded to a tropical depression near Clarksville, TN, on August 30 and was absorbed by a frontal system in southeastern Canada on the night of August 31. Appendix B provides Katrina’s best track analysis from TPC/NHC.
Katrina produced 62 tornadoes in eight states from Florida to Pennsylvania (Appendix C). The average lead-time for NWS tornado warnings during Katrina was 12 minutes. The highest rainfall total recorded in Katrina was 16.33 inches in Perrine, FL; Big Branch, LA, recorded 14.92 inches of rainfall, the highest rainfall amount in Louisiana.
The highest measured wind gust during Katrina was 135 mph, recorded in Popularville, MS, at Pearl River County Emergency Operations Center (HOC) before the instrument failed. Katrina produced wind gusts of 80 to 110 mph well inland over portions of southern, central, and eastern Mississippi. The highest reported wind gust in inland Mississippi was 114 mph in Ellisville. The strongest official sustained wind in Louisiana during Katrina was 87 mph measured at the Grand Isle Coastal Marine Automated Network (C-MAN) station. This station failed two hours before the eye passed nearby. The lowest observed pressure was 920.2 mb at the University of Louisiana - Monroe Weather Station in Buras, LA.
Storm surge data indicates that the maximum surge was 26 to 28 feel along the coast of Mississippi. Damage survey data suggests that the surge penetrated at least six miles inland in many portions of coastal Mississippi. The estimated storm surge in southeast Louisiana near New Orleans was 10 to 15 feet and 10 to 12 feet along the coast of Alabama. Four levee breaches occurred around New Orleans on August 29: two along the London Avenue Canal, one along the 17th Street Canal, and one along the Industrial Canal. Figure 3 shows the locations where the breaches occurred.
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Historic Hurricanes (Treutel Book) Historic-Hurricanes-Of-Hancock-County-1812-2012-(169)
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