Little change to Isaac, but storm poses a serious storm surge threat

By: Dr. Jeff Masters , 3:25 PM GMT on August 27, 2012

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Tropical Storm Isaac has changed little in strength or organization this morning, as the storm heads northwest at 14 mph towards the Central Gulf Coast. There are two hurricane hunter aircraft in the storm, and Isaac's central pressure held steady at 989 mb at the 8:30 am and 9:15 am center fixes. Top surface winds remain near 65 mph. Infrared and visible satellite loops show that Isaac is a very large storm, but isn't very symmetric. Heavy thunderstorm activity is lacking on the southeast side, where 10 knots of wind shear is driving dry air into the circulation. The center is surrounded by a ring of echoes now, which was not the case on Sunday. However, the echoes are weak. The 8:30 am center report from the Hurricane Hunters reported about half of a ragged eyewall, but the 9:15 am report did not mention any evidence of an eyewall. Isaac will have to form an eyewall in order to intensify significantly.


Figure 1. Morning satellite image of Isaac. Note the lack of heavy thunderstorm activity on the storm's southeast side, where dry air and wind shear are combining to interfere with development.

Isaac's rains
Isaac's heaviest rains have fallen along a swath from the east coast of Florida near West Palm Beach to the center of the state, just south of Orlando. West Palm Beach received 7.57" of rain from Isaac as of 10 am EDT this morning. A trained spotter in Western Boynton Beach reported 10" of rain from midnight to midnight Sunday. Heavy rains from Isaac are lingering over Cuba but have ended in Haiti and the Dominican Republic; flash floods in Haiti from Isaac's torrential rains killed at least nineteen, and two died in the Dominican Republic.


Figure 2. Radar-estimated rainfall from Melbourne, Florida radar shows that Isaac has dumped a wide swath of 3+ inches of rain (orange colors) across the state.

Latest model runs for Isaac
The latest set of 0Z and 06Z (8 pm and 2 am EDT) model runs are fairly unified taking Isaac ashore near Southeast Louisiana late Tuesday night or early Wednesday morning, but continue to show major differences in what happens after that. It is still uncertain if a trough of low pressure passing to the north of Isaac will be able to turn the storm due north, as the ECMWF model is predicting, or bypass the storm, allowing a more west-northwest motion into western Louisiana, like the GFS model is predicting. In either case, Isaac is likely to slow down as it approaches the coast, which will increase the damage potential fro m its wind, storm surge, and rains. The latest 8-day precipitation forecast from the GFS model calls for 10 - 20 inches of rain over much of Louisiana. The ECMWF model predicts that these heavy rains will fall more over Mississippi. It appears likely that Arkansas will see some heavy rains from Isaac late in the week, which would help put a dent in the exceptional drought conditions there.


Figure 3. Predicted precipitation for the 8-day period from 2 am Monday August 27 to 2 am Tuesday September 4, from the 2 am EDT August 27 run of the GFS model. This model is predicting a wide swath of 5 - 10 inches of rain (orange colors) will affect portions of Louisiana. Additional very heavy rains are predicted for the Midwest, as moisture from Isaac interacts with a cold front. Image credit: NOAA/NCEP.

Intensity forecast for Isaac
Isaac is currently crossing over a relatively cool eddy of water, which will keep intensification slow today. By tonight, the total heat content of the waters increases, which should aid intensification. Low wind shear of 10 knots or less is likely until landfall. An analysis of upper level winds from the University of Wisconsin CIMSS shows that upper-level outflow to the north is not as strong as yesterday, which should also slow intensification today. The models forecast the upper-level outflow should improve by Tuesday. A storm this large will have trouble undergoing rapid intensification, and Isaac's most likely intensity at landfall will be as a Category 1 hurricane, which is what most of the intensity models are forecasting.


Figure 4. Track of Hurricane Gustav of 2008, which followed a path very similar to that of Isaac's predicted path.

Storm surge forecast for Isaac
Storm surge is the primary damage threat from Isaac. Isaac is a huge storm, with tropical storm-force winds that extend out 205 miles from the center. For comparison, Hurricane Katrina at landfall had tropical storm-force winds that extended out 230 miles from its center. Isaac's large size will enable it to set a large area of the ocean into motion, which will generate a large storm surge once the storm approaches land on the Gulf Coast. Water levels at Shell Beach, Louisiana, just east of New Orleans, were already elevated by 1' this morning. Conversely, water levels have fallen by 2' this morning at St. Petersburg, Florida, where strong offshore winds due to Isaac's counter-clockwise circulation have carried water away from the coast. The latest 6:30 am EDT Integrated Kinetic Energy analysis from NOAA's Hurricane Research Division put the destructive potential of Isaac's winds near 0.6 on a scale of 0 to 6, but the destructive potential of Isaacs's storm surge was 2.1 on a scale of 0 to 6. I expect this destructive potential will rise above 3 by time Isaac makes landfall, making Isaac's storm surge similar to that generated by Category 2 Hurricane Gustav of 2008, which followed a path very similar to Isaac's predicted path. Gustav brought a storm surge characteristic of a Category 1 hurricane to New Orleans: 9.5' to Lake Borgne on the east side of the city. A higher Category 2-scale surge occurred along the south-central coast of Louisiana, and was 12.5' high in Black Bay, forty miles southeast of New Orleans. Recent model runs indicate Isaac may slow down to a forward speed under 5 mph on Tuesday evening and Wednesday morning, close to the coast. If Isaac is just offshore at this time, the coasts of Southeast Louisiana, Mississippi, Alabama, and the Florida Panhandle will be exposed to a large storm surge with battering waves for two high tide cycles. This sort of extending pounding will be capable of delivering more damage than the storm surge of Hurricane Gustav of 2008.

The affect of storm size and angle of approach on storm surge
A 2008 paper by Irish et al., The influence of storm size on hurricane surge, found that large storms like Isaac are capable to delivering a 30% larger storm surge to the coast than a smaller storm with the same maximum wind speeds. The angle with which the storm hit the coast is important, too--a storm moving due north or slightly east of north will deliver a storm surge about 10% greater than a storm moving NNW or NW. Consult our Storm Surge pages for detailed information on what the risk is for the coast. I expect that Isaac's storm surge will be about 30% higher than the typical surge one would expect based on the maximum wind speeds.

Isaac's storm surge will provide the first test of the newly-completed New Orleans levee system upgrade. In the wake of the disastrous storm surge flooding from Hurricane Katrina in 2005, Congress appropriated $14.5 billion to upgrade the New Orleans levee system to withstand a Category 3 hurricane storm surge. Katrina was a Category 3 storm at landfall, but the storm passed far enough to the east of the city that its storm surge was characteristic of a Category 1 - 2 storm at the places where the city's flood walls and levees failed. The new flood defenses were only partially completed in time for the arrival of Hurricane Gustav in 2008, which hit Central Louisiana as a Category 2 storm. Gustav brought a storm surge characteristic of a Category 1 hurricane to New Orleans: 9.5' to Lake Borgne on the east side of the city. Since that time, the imposing 2-mile long IHNC Flood Barrier has been completed to block off the funnel-shaped pair of canals on the east side of the city. I expect New Orleans' new flood defenses will be able to hold back Isaac's surge, but areas outside the levees are at risk of heavy storm surge damage.


Figure 5. A portion of New Orleans' new $14.5 billion dollar flood defenses, as taken from an Army Corps of Engineers map.

New Orleans flood defense info
Army Corps of Engineers map of the new flood defenses
Army Corps of Engineers video showing the flood defenses
New York Times article, Vast Defenses Now Shielding New Orleans

Invest 97L off the coast of Africa
A tropical wave (Invest 97L) is located in the Middle Atlantic, about 1050 miles west-northwest of the Cape Verde Islands. The storm has a modest amount of spin and heavy thunderstorms, and is under moderate wind shear. In their 8 am EDT Tropical Weather Outlook, NHC gave 97L a 30% chance of developing by Wednesday morning. None of the reliable models foresee that 97L will be a threat to the Lesser Antilles Islands, and high wind shear should begin to tear the disturbance apart on Tuesday.

Another tropical wave that moved off the coast of Africa on Sunday is located just south of the Cape Verde Islands. This disturbance is moving west at 10 - 15 mph, and could arrive in the Lesser Antilles around September 2. Several models develop the disturbance into a tropical depression late this week, and NHC is giving the disturbance a 10% chance of becoming a tropical depression by Wednesday morning.

Angela Fritz will have a new post here by 6 pm EDT. I'm in Atlanta to help out The Weather Channel with their on-air hurricane coverage, and will doing a few 3-minute tropical updates at 30 minutes past the hour between 2:30 - 7:30 pm EDT today.

Jeff Masters

Tropical Storm Isaac (chelina)
View from the north side of the Sunshine Skyway Bridge.
Tropical Storm Isaac
our street at noon today (seflagamma)
Aug 26, 2012: Isaac floods our street really bad. Now nearly 11
our street at noon today

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Quoting HoustonTxGal:


I mentioned last night that about this latitude we could see Isaac move a bit west for a period before turning back wnw and then nw, etc.
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Quoting Felix2007:

986mb, not 966.
its at 986 now.
Member Since: August 1, 2011 Posts: 0 Comments: 701
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Quoting Bobbyweather:

Two ensembles bring Isaac to Iceland! LOL
And one brings it to Philadelphia!
Others bring it to New York and the New England area, then out to the Canadian Maritimes.
Of course it's days out, so it could change.
anywere but Florida I noticed......
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Quoting RitaEvac:


..no storm drains there by you ??
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Quoting MississippiWx:
12z GFS was more impressive with Isaac at landfall, bringing him down to a 966mb storm. Would be Cat 2 pressure, at least. Just goes to show that Isaac has time to strengthen more than forecast.




986mb, not 966.
Member Since: July 12, 2008 Posts: 7 Comments: 383
Isaac is a large system..we are get tropical rains up here today from it..
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Quoting leelee75k:
Is it me or does the blob over Florida seem to not to want to follow Isaac into the gulf?
I noticed that this morning..one on the east coast and one off the west coast..

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No damage to speak of here in Naples Florida, and just the minor inconvenience of a comcast outage from 5 pm yesterday until 10 am this morning. As a consequence for me not having to spend money on repairs, Portlight has received a donation from me today so they can help those who will get damage.
Now back to lurking...
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Quoting RitaEvac:




Rita, thank you so much!!! I have no idea how you did it but much appreciated!
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Looks like comment 136 is getting a lot of + marks...

I don't mind being criticized...If I am doing something wrong or annoying I should be called out on it. My response to the critique is in comment 159...so you can let me know privately (WU-mail or somethin) if you think I should/should not announce my short statements on this blog (see comment 159 for example of short statement). If you don't think so...you can send me mail or let me know on my blog...with that I'll let it be...

I guess its back to work...lunchbreak over...
Member Since: September 15, 2009 Posts: 493 Comments: 3688
Quoting Bobbyweather:

Two ensembles bring Isaac to Iceland! LOL
And one brings it to Philadelphia!
Others bring it to New York and the New England area, then out to the Canadian Maritimes.
Of course it's days out, so it could change.


You forgot one going to Alaska...LOL!!
Member Since: September 18, 2007 Posts: 0 Comments: 1074
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Quoting seflagamma:


and still coming down. we are in the wrong place for this one.. all the bands stream over us and no one else...
Your not in the wrong place. i would say your in the right place for this one.
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Quoting seflagamma:


and still coming down. we are in the wrong place for this one.. all the bands stream over us and no one else...


You guys seem to have found the sweet spot with Isaac..are you having to use any sandbags yet?
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12z GFS was more impressive with Isaac at landfall, bringing him down to a 966mb storm. Would be Cat 2 pressure, at least. Just goes to show that Isaac has time to strengthen more than forecast.



Member Since: July 15, 2006 Posts: 17 Comments: 10284
Quoting seflagamma:


Thanks for going to look at it; I cannot post it here for some reason..

our back yard is under water.. the water level is above the pool...

my neighbor's car is about to get water in it from driveway..

No regular vehicles can get down the street...


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Quoting HoustonTxGal:
Ensembles


Two ensembles bring Isaac to Iceland! LOL
And one brings it to Philadelphia!
Others bring it to New York and the New England area, then out to the Canadian Maritimes.
Of course it's days out, so it could change.
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THE NATIONAL WEATHER SERVICE IN TAMPA BAY RUSKIN HAS ISSUED A
HIGH SURF ADVISORY...WHICH IS IN EFFECT UNTIL 4 PM EDT TUESDAY. A
COASTAL FLOOD ADVISORY HAS ALSO BEEN ISSUED. THIS COASTAL FLOOD
ADVISORY IS IN EFFECT UNTIL 8 PM EDT THIS EVENING. IN ADDITION...
A BEACH HAZARDS STATEMENT FOR AN EXTREME RISK OF RIP CURRENTS HAS
BEEN ISSUED. THIS BEACH HAZARDS STATEMENT IS IN EFFECT THROUGH
TUESDAY AFTERNOON.

* COASTAL FLOODING...WATER LEVELS WILL RISE TO BETWEEN 1 TO 3 FEET
ABOVE NORMAL TIDES.

* WAVES AND SURF...VERY HIGH WAVES ASSOCIATED WITH TROPICAL STORM
ISAAC WILL CONTINUE TO PROPAGATE TOWARD THE COAST GENERATING
SURF HEIGHTS OF 4 TO 6 FEET.

* HAZARDS...THE LARGE WAVES AND HIGH SURF WILL RESULT IN LIFE
THREATENING RIP CURRENTS ALONG THE COAST.

* TIMING...THE MINOR COASTAL FLOODING WILL CONTINUE INTO THIS
EVENING THEN ABATE. HAZARDOUS SURF AND DANGEROUS RIP CURRENTS
WILL CONTINUE THROUGH TUESDAY AFTERNOON.

* LOCATION...THE ENTIRE COASTLINE FROM BONITA BEACH TO TARPON
SPRINGS INCLUDING THE BARRIER ISLANDS AND ASSOCIATED SURF ZONE.

* IMPACTS...ADDITIONAL MINOR BEACH EROSION IS POSSIBLE. RESIDENTS
AND VISITORS ENTERING THE GULF WATERS RISK DROWNING IN THE
STRONG RIP CURRENTS.
Member Since: August 6, 2011 Posts: 4 Comments: 39132
136 AlRokerROCKS Please don't pimp...

Please don't post here. Ya ain't got nothin' to say about the weather. Ya ain't never been funny.
Ya ain't never been clever. AND you've already been permabanned for trolling
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Do not worry yet about possible systems out in the Atlantic - for those of you in Gulf States and immediately concerned with Isaac - there are plenty of Caribbean bloggers here who will keep a "weather eye" out on behalf of all others.
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Quoting TreasureCoastFl:
I dont know what it is, but definitely got worse real quick!
Agreed, much worse here in River Pines by Northport K-8. The worst by far yet. When it stops for a while I'll check security cams and upload if anything interesting shows. Street is flooded so I can only assume the ditch behind the house (small canal) has overrun it's banks or is clogged. Major thunder and lightning here as well. Everybody in one bedroom. Family "togetherness" lol.
Member Since: August 31, 2011 Posts: 0 Comments: 70
187. bwi
Wind shift at the buoy. 988 mb


10:50 am SE ( 127 deg ) 3.9 m/s
10:40 am NE ( 38 deg ) 2.6 m/s
10:30 am NNE ( 21 deg ) 3.7 m/s
10:20 am NNE ( 15 deg ) 6.8 m/s
10:10 am NNE ( 25 deg ) 9.6 m/s
10:00 am NNE ( 16 deg ) 12.1 m/s
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Quoting ncstorm:


that is a lot of rain!


and still coming down. we are in the wrong place for this one.. all the bands stream over us and no one else...
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TORNADO WARNING
FLC061-085-111-271700-
/O.NEW.KMLB.TO.W.0023.120827T1615Z-120827T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1215 PM EDT MON AUG 27 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
EASTERN INDIAN RIVER COUNTY IN FLORIDA...
NORTHEAST MARTIN COUNTY IN FLORIDA...
EASTERN ST. LUCIE COUNTY IN FLORIDA...

* UNTIL 100 PM EDT.

* AT 1211 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR INDIAN
RIVER ESTATES...MOVING NORTH AT 35 MPH. ANOTHER DEVELOPING
CIRCULATION WAS DETECTED NEAR STUART.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FORT PIERCE..SAINT LUCIE VILLAGE...QUEENS COVE...LAKEWOOD
PARK...VERO BEACH HIGHLANDS...SOUTH BEACH...POINTE WEST AND VERO
LAKE ESTATES

TORNADOES ASSOCIATED WITH TROPICAL CYCLONES ARE OFTEN WRAPPED IN
HEAVY RAIN AND ARE HARD TO SEE OR HEAR UNTIL THEY ARE VERY CLOSE. DO
NOT GET CAUGHT OFFGUARD!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STRONG BUILDING ON
THE LOWEST FLOOR. MOVE TO AN INTERIOR ROOM...SUCH AS A BATHROOM OR
CLOSET AND KEEP AWAY FROM WINDOWS. GET UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR
BODY.

STORMS WITHIN DOMINANT RAINBANDS CAN PRODUCE TORNADOES VERY QUICKLY!
OFTEN...IN SITUATIONS SUCH AS THIS...MORE THAN ONE TORNADO IS
PRODUCED. BE PREPARED FOR THE OCCURRENCE OF MULTIPLE TORNADOES MOVING
THROUGH THE RAINBAND!

&&

LAT...LON 2711 8015 2712 8037 2781 8056 2782 8045
2783 8042 2723 8018 2724 8017 2720 8017
2720 8019 2718 8017
TIME...MOT...LOC 1613Z 170DEG 23KT 2738 8034

$$


15
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Quoting leelee75k:
Is it me or does the blob over Florida seem to not to want to follow Isaac into the gulf?


See that dark blob of rain is right over my area..

we cannot get a break here...

and what about something forming off the east coast???
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Quoting HoustonTxGal:


New Olympic sport... Synchronized storms ;o)
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Quoting seflagamma:


Thanks for going to look at it; I cannot post it here for some reason..

our back yard is under water.. the water level is above the pool...

my neighbor's car is about to get water in it from driveway..

No regular vehicles can get down the street...


that is a lot of rain!
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Isaac not real impressive - will this lessen storm surge threat? or does the surge happen regardless?
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Video of Isaac feeder band storm. Basketball hoop almost
lands on car.
Link
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Quoting LargoFl:
..................wow look at all the flood alerts in green
wonder why the colors always fail to show on these maps?
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Ensembles

Member Since: September 18, 2007 Posts: 0 Comments: 1074
Quoting LargoFl:
WTNT24 KNHC 271448
TCMAT4

TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER 26
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092012
1500 UTC MON AUG 27 2012

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

ALL TROPICAL STORM WARNINGS HAVE BEEN DISCONTINUED EAST AND SOUTH OF
AUCILLA RIVER FLORIDA.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A HURRICANE WARNING IS IN EFFECT FOR...
* EAST OF MORGAN CITY LOUISIANA TO DESTIN FLORIDA...INCLUDING
METROPOLITAN NEW ORLEANS...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS

A HURRICANE WATCH IS IN EFFECT FOR...
* INTRACOASTAL CITY TO MORGAN CITY LOUISIANA

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* EAST OF DESTIN FLORIDA TO THE AUCILLA RIVER
* INTRACOASTAL CITY TO MORGAN CITY LOUISIANA

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* EAST OF SABINE PASS TO WEST OF INTRACOASTAL CITY LOUISIANA
greetings Largo. did yall get much from this storm?
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Quoting leelee75k:
Is it me or does the blob over Florida seem to not to want to follow Isaac into the gulf?
..might be something trying to form there
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Quoting Thing342:
I think Gordon may have been a Cat 3 for about 3 hours in between advisories.

True dat...I guess we'll find out in the NHC post-storm report at the end of this season. Or better yet..maybe they'll upgrade him to cat 3 like 10 years later (sort of like how they re-analyzed Andrew to cat 5 10 years after the fact)...
Member Since: September 15, 2009 Posts: 493 Comments: 3688
..................wow look at all the flood alerts in green
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Is this storm going to be the drought buster everyone has been praying for?
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Is it me or does the blob over Florida seem to not to want to follow Isaac into the gulf?
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Member Since: September 18, 2007 Posts: 0 Comments: 1074
note wind speed in KMH.

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Quoting Levi32:
Good afternoon.

Blog update:

Tropical Tidbit for Monday, August 27th, with Video
Very informative T/Y!
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Is there a possibility 97L will form into the K storm before August 31?
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Member Since: September 18, 2007 Posts: 0 Comments: 1074
Quoting pensacolastorm:
The GFS has another storm in the eastern caribbean in 7 days.


Correct... soon to be 98L and with a similar track as its predecessor.
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Quoting LargoFl:
guys there may yet be something trying to form off the east coast of florida..nws has a watch area for it..be careful over there.............



Yes looks to dispose of the deadweight over florida and spinning up.

If it could create some inflow via Yucatan channel with more moisture it would probably get going. But hopefully
it stays at this strength til landfall.

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Quoting pensacolastorm:
The GFS has another storm in the eastern caribbean in 7 days.


I wondered if anyone had noticed that. Any info?
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I know you guys are all watching Isaac. But in the longer term the news announced by the NSIDC about the artic ice today may be more significant. At least, until it happens again next year or the year after.
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Is it me, or is it moving due West rather than NW?
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Member Since: September 18, 2007 Posts: 0 Comments: 1074
WTNT24 KNHC 271448
TCMAT4

TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER 26
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092012
1500 UTC MON AUG 27 2012

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

ALL TROPICAL STORM WARNINGS HAVE BEEN DISCONTINUED EAST AND SOUTH OF
AUCILLA RIVER FLORIDA.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A HURRICANE WARNING IS IN EFFECT FOR...
* EAST OF MORGAN CITY LOUISIANA TO DESTIN FLORIDA...INCLUDING
METROPOLITAN NEW ORLEANS...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS

A HURRICANE WATCH IS IN EFFECT FOR...
* INTRACOASTAL CITY TO MORGAN CITY LOUISIANA

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* EAST OF DESTIN FLORIDA TO THE AUCILLA RIVER
* INTRACOASTAL CITY TO MORGAN CITY LOUISIANA

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* EAST OF SABINE PASS TO WEST OF INTRACOASTAL CITY LOUISIANA
Member Since: August 6, 2011 Posts: 4 Comments: 39132
Quoting AlRokerROCKS:


Please don't pimp your blog, especially when you don't have anything new to contribute


Normally my blogs are more extesnsive with custom birdseye view charts....like in this FULL update....

Those charts in the FULL update are something unique I create to help show bloggers how the atmoshpere is setup...and I write a FULL discussion...so hopefully unlike the SHORT statements, that does add to the knowledge here.

The update I just released is just a SHORT statement...because there are some things I said in my previous FULL update that have changed. If these SHORT statements are annoying to y'all...then I guess I can stop announcing them on this blog...

Member Since: September 15, 2009 Posts: 493 Comments: 3688

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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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