teknobucks
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[font="verdana, arial, helvetica,"]The U.S. appears to be in line for another catastrophic landfalling hurricane
One cannot underestimate the gravity of the situation. All evacuation requests should be heeded by all persons with no exceptions.
For a reminder of how serious the situation could be, the following are headlines from the Galveston Hurricane of 1900, a Category 4 hurricane at landfall:
Great Disaster at Galveston: Deaths May Be Over 2,600
The Wrecking of Galveston: Story Told in Detail by a Newspaperman Who Escaped--People Caught Like Rats in Traps
Many Towns Wrecked: Terrible Destruction and Great Loss of Life in the Path of the Storm Inland
At 11 pm, Hurricane Rita was centered at 24.6N 87.2W and packing maximum sustained winds of 175 mph. Its central pressure had also fallen earlier to 897 mb (26.48”), the 3rd lowest for any Atlantic basin hurricane. This is much stronger than I had expected.
Given that Rita will generally be passing across 29°C-30°C waters until landfall, it will probably not weaken significantly. I do believe that there will be some weakening, especially as Rita will likely cross a patch of waters with a hurricane heat content figure of less than 10:
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Nonetheless, once Rita has passed such waters, its weakening should be gradual. Hence, it will likely make landfall as a Category 4 hurricane and I have increased my estimate to 140 mph so as to take into consideration the hurricane heat content and possible eyewall replacement cycles. It also matches up well with Hurricane #2 (1919), which has so far served as a good analog.
There remains a possibility that Rita could be even stronger at landfall. At present, Hurricane #5 (1886), the “Indianola Hurricane,” is the strongest on record to make Texas landfall. It came ashore with maximum sustained winds of 155 mph.
Right now, the guidance has shifted somewhat to the north and east. However, the GFS 500 mb ensemble mean height anomalies indicate that the turn might be wider than what some of the guidance suggests:
In addition, if one examines the frames for 9/26 0z and 9/27 0z, it is implied that Rita could stall out somewhere in central or northern Texas. If so, that would imply substantial flooding rains for that part of Texas, perhaps in the 10”-20” range.
The 9/21 12z European Model also argued against a northern Texas landfall. Hence, the thinking remains essentially the same with only a small northward adjustment to take into consideration Rita’s somewhat north of west trajectory. I also retain the idea that Rita will make landfall at a northwest heading rather than one that is between north-northwest or even due north.
Right now, I believe Rita will make landfall somewhere between Corpus Christi and Galveston:
Given Rita’s size, a significant portion of Texas’ coast will likely experience hurricane conditions. Hurricane conditions could also extend across a portion of the Louisiana coastline. However, New Orleans should not suffer from anything close to such severe conditions.
Strongest Atlantic Hurricanes:
1. Gilbert (1988): 888 mb
2. Hurricane #2 (1935) “Labor Day Hurricane:” 892 mb
3. Rita (2005): 897 mb
4. Allen (1980): 899 mb
5. Katrina (2005): 902 mb
6. Camille (1969): 905 mb
6. Mitch (1998): 905 mb
Seasons with Louisiana and Texas having Major Hurricane Landfalls in the Same Year:
1886:
∙ Hurricane #5 “Indianola Hurricane”: Texas (Indianola): Category 4
∙ Hurricane #10: Louisiana: Category 3
1909
∙ Hurricane #4 “Velasco Hurricane:” Texas (Northern Texas): Category 3
∙ Hurricane #8 “Grand Isle Hurricane:” Louisiana (Grand Isle): Category 4
Note: Hurricane #10 made landfall in the Florida Keys as a Category 3 storm
1915
∙ Hurricane #2: Texas (Galveston): Category 4
∙ Hurricane #5: Louisiana (New Orleans): Category 3
Also, it should be noted that no seasons have seen two Category 4 hurricanes make landfall since regular recordkeeping began in 1851.
Estimated Track:
25.0N 90.0W
27.5N 95.0W
30.0N 97.5W
Estimated Strength at Landfall:
Landfall in Texas: 140 mph[/font]
[font="verdana, arial, helvetica,"]__________________
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[font="verdana, arial, helvetica,"]The U.S. appears to be in line for another catastrophic landfalling hurricane
One cannot underestimate the gravity of the situation. All evacuation requests should be heeded by all persons with no exceptions.
For a reminder of how serious the situation could be, the following are headlines from the Galveston Hurricane of 1900, a Category 4 hurricane at landfall:
Great Disaster at Galveston: Deaths May Be Over 2,600
The Wrecking of Galveston: Story Told in Detail by a Newspaperman Who Escaped--People Caught Like Rats in Traps
Many Towns Wrecked: Terrible Destruction and Great Loss of Life in the Path of the Storm Inland
At 11 pm, Hurricane Rita was centered at 24.6N 87.2W and packing maximum sustained winds of 175 mph. Its central pressure had also fallen earlier to 897 mb (26.48”), the 3rd lowest for any Atlantic basin hurricane. This is much stronger than I had expected.
Given that Rita will generally be passing across 29°C-30°C waters until landfall, it will probably not weaken significantly. I do believe that there will be some weakening, especially as Rita will likely cross a patch of waters with a hurricane heat content figure of less than 10:
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DTG LAT LON ANALYS DTG SSHA SST Z26 HHC
2005092121 ACT 24.40N 86.80W 2005092100 0.076 29.811 79.175 20.708
2005092206 FOR 24.50N 88.50W 2005092100 0.007 29.572 42.704 10.564
2005092218 FOR 25.20N 90.60W 2005092100 -0.261 29.404 27.241 5.695
2005092306 FOR 26.00N 92.70W 2005092100 0.124 29.393 45.517 11.578
2005092318 FOR 27.00N 94.50W 2005092100 -0.047 29.491 39.393 10.144
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Nonetheless, once Rita has passed such waters, its weakening should be gradual. Hence, it will likely make landfall as a Category 4 hurricane and I have increased my estimate to 140 mph so as to take into consideration the hurricane heat content and possible eyewall replacement cycles. It also matches up well with Hurricane #2 (1919), which has so far served as a good analog.
There remains a possibility that Rita could be even stronger at landfall. At present, Hurricane #5 (1886), the “Indianola Hurricane,” is the strongest on record to make Texas landfall. It came ashore with maximum sustained winds of 155 mph.
Right now, the guidance has shifted somewhat to the north and east. However, the GFS 500 mb ensemble mean height anomalies indicate that the turn might be wider than what some of the guidance suggests:
In addition, if one examines the frames for 9/26 0z and 9/27 0z, it is implied that Rita could stall out somewhere in central or northern Texas. If so, that would imply substantial flooding rains for that part of Texas, perhaps in the 10”-20” range.
The 9/21 12z European Model also argued against a northern Texas landfall. Hence, the thinking remains essentially the same with only a small northward adjustment to take into consideration Rita’s somewhat north of west trajectory. I also retain the idea that Rita will make landfall at a northwest heading rather than one that is between north-northwest or even due north.
Right now, I believe Rita will make landfall somewhere between Corpus Christi and Galveston:
Given Rita’s size, a significant portion of Texas’ coast will likely experience hurricane conditions. Hurricane conditions could also extend across a portion of the Louisiana coastline. However, New Orleans should not suffer from anything close to such severe conditions.
Strongest Atlantic Hurricanes:
1. Gilbert (1988): 888 mb
2. Hurricane #2 (1935) “Labor Day Hurricane:” 892 mb
3. Rita (2005): 897 mb
4. Allen (1980): 899 mb
5. Katrina (2005): 902 mb
6. Camille (1969): 905 mb
6. Mitch (1998): 905 mb
Seasons with Louisiana and Texas having Major Hurricane Landfalls in the Same Year:
1886:
∙ Hurricane #5 “Indianola Hurricane”: Texas (Indianola): Category 4
∙ Hurricane #10: Louisiana: Category 3
1909
∙ Hurricane #4 “Velasco Hurricane:” Texas (Northern Texas): Category 3
∙ Hurricane #8 “Grand Isle Hurricane:” Louisiana (Grand Isle): Category 4
Note: Hurricane #10 made landfall in the Florida Keys as a Category 3 storm
1915
∙ Hurricane #2: Texas (Galveston): Category 4
∙ Hurricane #5: Louisiana (New Orleans): Category 3
Also, it should be noted that no seasons have seen two Category 4 hurricanes make landfall since regular recordkeeping began in 1851.
Estimated Track:
25.0N 90.0W
27.5N 95.0W
30.0N 97.5W
Estimated Strength at Landfall:
Landfall in Texas: 140 mph[/font]
[font="verdana, arial, helvetica,"]__________________
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