4chan Hurricane Katrina All Over Again
On August 23rd, a tropical depression formed over the southeastern Bahamas, becoming Tropical Tempest Katrina on August 24th as it moved into the central Bahamas. The storm continued to track due west while gradually intensifying and made its initial landfall along the southeast Florida coast on Baronial 25th equally a Category ane hurricane (80mph) on the Saffir-Simpson Hurricane Scale. Afterward moving west beyond south Florida and into the very warm waters of the Gulf of Mexico, Katrina intensified rapidly and attained Category v condition (with peak sustained winds of 175mph) for a period of fourth dimension as it moved northwest on August 28th. Katrina weakened to a Category 3 earlier making landfall along the northern Gulf Coast, outset in southeast Louisiana (sustained winds: 125mph) and then made landfall once more along the Mississippi Gulf Coast (sustained winds: 120mph). Katrina finally weakened below hurricane intensity late on Baronial 29th over due east central Mississippi.
The damage and loss of life inflicted by this massive hurricane in Louisiana and Mississippi was staggering with pregnant effects extending into Alabama and the western Florida panhandle. This was a storm that captivated the public and media with most coverage occurring in the New Orleans area. Because the scope of its impacts, Katrina was ane of the most devastating natural disasters in United States history.
Equally Katrina set new minimum cardinal pressure records while 
approaching the northern Gulf Coast on Sunday, August 28th, the storm fabricated its concluding turn to the northward every bit information technology moved toward southeastern Louisiana. Katrina was a large storm with a very distinct eye. Early the 28th, Katrina reached a minimum central pressure of 902mb (at the peak) - ranking 7th lowest on record for all Atlantic Basin hurricanes - and rapidly intensified to a Category 5 (175mph).
Katrina and then weakened to a Category four hurricane as information technology moved across the northward central Gulf and weakened further to a strong Category three hurricane before long earlier making landfall in southeast Louisiana. The central pressure at landfall was 920mb - ranking third lowest on tape for a US landfalling hurricane, behind Hurricane Camille in 1969 (900mb) and the Labor Day Hurricane that struck the Florida Keys in 1935 (892mb).
The storm continued moving north-northeast and fabricated a second landfall over Hancock County, Mississippi (near the oral cavity of the Pearl River) - still Category 3. After Katrina moved inland into southern Mississippi on the afternoon of August 29th, the storm left a wake of devastation that will never be forgotten. The loss of life and belongings damage was heightened by breaks in the levees that dissever New Orleans from Lake Pontchartrain. At least lxxx% of New Orleans was under overflowing waters on August 31st.
Photo courtesy of NOAA, Office for Littoral Management, DigitalCoast
Although much volition be written on the effects associated with this storm, this document will remain focused on Hurricane Katrina'south impacts over inland southeast Mississippi, southwest Alabama and the northwest Florida Panhandle. Beneath are some of the regional impacts...
Leap to - Storm Surge, Wind, Tornadoes, Rainfall, Animations, Imagery, or Additional Information sections.
Tempest SURGE
Known for its storm surge, Katrina's highest surge was found in a zone from just due east of the center most Bay St. Louis, MS east to the northern reaches of Mobile Bay. The Mobile State Docks measured the highest storm surge of 11.45 feet, while the lowest was iv.1 anxiety in the Santa Rosa Sound in northwest Florida. Storm surge was as high every bit 12-14 feet in Bayou La Batre, AL and likely close to twenty anxiety along the Mississippi-Alabama edge.
Many homes were engulfed by Katrina's surge in Bayou La Batre, AL. Major beach erosion occurred from Dauphin Island to east of Des can. The west stop of Dauphin Island was completely under h2o with most of the homes on the west end done away. The surge in Mobile Bay led to inundation of downtown Mobile causing the imposition of a sunset-to-dawn curfew. The Wallace Tunnel was closed due to high water from the surge. Most of the busine sses on the Causeway over Mobile Ba y were damaged or destroyed by the high water. An oil rig broke gratuitous and fl oated up Mobile Bay and became lodged underneath the Cochran-Africatown Bridge. The Mobile State Docks surge value of 11.45 feet was very close to being the highest value always recorded. The previous tape of xi.60 feet was set on July 5, 1916. [The exact location and degree of accuracy of the 1916 record surge value is unknown.]
No lives were lost due to the storm surge across Mobile and Baldwin Counties in southern Alabama. Long lead warning times were given by the NWS Offices in Mobile, AL and New Orleans, LA every bit to how high the surge would be. As early equally two days before landfall, the NWS Function in Mobile issued a Hurricane Local Statement (at 725pm) that foretold of the historic storm surge values of viii-12 feet well due east of Katrina'due south center.
Storm Surge Map depicting a portion of tempest surge data.
Observed tempest surge information [Annotation: Highest tides occurred August 29, 2005]
| Tide Gage | Highest Tide (MSL) | Fourth dimension (UTC) |
| Mobile Country Docks (MBRA1) | 11.45 | 1848 |
| USS Alabama (estimated) | 12.00 | |
| Dauphin Island (DAUA1) | 6.63 | 1645 |
| Dauphin Isle (DPIA1) | half-dozen.23 | 1542 |
| Perdido Pass (PPSA1) | 5.81 | 1336 |
| Pensacola (PENF1) | 5.37 | |
| Destin (EPSF1) | 4.52 | 1336 |
| Santa Rosa Sound (FWLF1) | four.10 | 1654 |
Wind
Katrina'due south maximum windspeeds at landfall near Grand Isle, LA may have been as loftier equally 140mph. Every bit Katrina moved farther north and made a second landfall along the Mississippi/Louisiana edge, the NWS Doppler Radar in Mobile (KMOB) measured winds upwardly to 132mph between 3,000-four,000 feet above ground level in the morning. It is estimated that 80-xc% (approximately 104-119mph) of the maximum air current speed value actually reached the ground.
Tree damage across Stone and George Counties in southward Mississippi was very similar to the damage produced by Hurricane Ivan (2004) across Atmore and Brewton in southward central Alabama.
In this velocity loop (759-859am CDT), the eye of the storm, denoted by the large white circle, is southwest of the region of maximum surface wind speeds. These measurements are the winds flowing toward KMOB radar. [Colour scale where the next highest velocity values begin: grayness = 104mph; brown = 109mph; dark blueish = 114mph; cyan = 117mph; light-green >127 mph]
The current of air gust assay map shown below is courtesy of the NWS Office in Jackson, MS.
Sustained Winds and Maximum Wind Gusts [Note: wind information occurred August 29, 2005]
| Location | Sustained Air current (knots) | Pinnacle Gust, Fourth dimension (knots, UTC) |
| Mobile Regional Airport (KMOB) | 57 | 72 at 1608 |
| Brookley Field (KBFM) | 58 | 73 at 1501 |
| Destin (KDTS) | 30 | 44 at 1727 |
| Pensacola Drome (KPNS) | 49 | 60 at 1451 |
| Crestview (KCEW) | thirty | 38 at 1842 |
| Evergreen (KGZH) | 32 | 42 at 2118 |
| Eglin AFB (KVPS) | 33 | 46 at 1709 |
| Mary Esther (KHRT) | 38 | 52 at 1521 |
| Pensacola Naval Air Station (KNPA) | 49 | 62 at 1812 |
| Eglin AFB | 51 | 60 at 1452 |
| Dauphin Island (DPIA1) | 64 | 89 at 1542 |
| Pensacola (WEAR-Goggle box) | 50 | |
| Mobile Bay (USS Alabama) | 90 | |
| Holley Heart School, FL | 40 | |
| Destin Eye School, FL | 37 | |
| Wright Elementary School, FL | 39 | |
| Semmes | 57 |
TORNADOES
The outer bands of Hurricane Katrina produced numerous tornadoes throughout the southeastern US on August 28-29, especially across southern Alabama and the northwest Florida panhandle. In total, four tornadoes rated F0 occurred in southern Alabama (2- Mobile County, i- Baldwin County, i- Escambia County) and five tornadoes rated F0 occurred in the northwest Florida panhandle (2- Okaloosa County, two- Santa Rosa County, 1- Escambia County).
A majority of the tornadoes in the outerbands of Katrina were cursory and on the footing for 1/2 mile to two miles. The largest tornado path occurred in Santa Rosa Canton near Munson, FL and was on the ground for three miles. Further inland across areas covered by the NWS Offices in Jackson, MS and Birmingham, AL, tornadoes were rated F1-F2 with slightly longer paths.
Near of the impairment associated with these weak outer band tornadoes was tree and electric line harm. No fatalities or injuries occurred with these tornadoes.
NOTE: The F scale was used to rate these tornadoes back in 2005. Every bit of 2007, the NWS now uses the EF scale to rate tornadoes.
Radar animation via NCEI (formerly NCDC)
RAINFALL
KMOB radar showed the greatest rainfall amounts occurred east of Katrina'southward eye and very shut to the coast. A full general 5-10 inches of rain fell with isolated amounts exceeding 12 inches. Rain bands extending well east of Katrina's heart brought isolated rainfall totals of 3-6 inches over farthermost northwest Florida. Significantly lighter rainfall amounts (less than two inches) savage east of a line from Camden, AL to Evergreen, AL to Navarre, FL. The highest rainfall total observed in our county warning area was in Philpot, FL where seven.80 inches of rain fell in 48 hours. Wink flooding occurred throughout the day as Katrina made landfall due to the heavy rainfall.
The extend of rainfall tin exist seen in the map of observed atmospheric precipitation for the southeastern US during Hurricane Katrina'southward lifetime (August 24-30). Photo courtesy of NCEI (formerly NCDC).
48 hour total rainfall (inches) catastrophe at 1159pm on Baronial 29, 2005
| Location | 48 hour rainfall (inches) |
| Mobile Regional Aerodrome (KMOB) | 3.80 |
| Thomasville | 3.17 |
| Semmes | v.70 |
| Pensacola (Clothing-Boob tube) | 3.06 |
| Daphne | 4.97 |
| Philpot, FL | 7.lxxx |
| Milton | four.l |
| Molino | 5.00 |
| Oak Grove | 6.00 |
NWS Mail-Tropical Cyclone Reports - Katrina NCDC Special Report - Katrina NWS Katrina Local Write-Ups and Webpages:
NWS Mobile, AL
NWS New Orleans, LA
NHC Tropical Whirlwind Report - Katrina
NOAA Tide Gage (Preliminary) Water Levels Report
NWS New Orleans
NWS Jackson
NWS Birmingham
NWS Huntsville
NWS Memphis
NWS Shreveport
NWS Nashville
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Source: https://www.weather.gov/mob/katrina
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