7:10pm Isaac Update

By -
At 7:10pm, 100,000+ homes and businesses without power in southeast Louisiana, including New Orleans. Grand Isle just had a gust of 76 mph. Barometric pressure has dropped another 3 mb to 967 mb. The storm is still slowly strengthening. 

The graph is the tide The storm surge is running above forecast at the present time. The green line is the forecast and the gray is actual. The surge is about 1ft. above the forecast. Hat tip: Jesse Ferrell.

Below is a map of Shell Beach (orange peg), which is southeast of New Orleans.

Winds are now gusting to 64 mph at New Orlean's Lakefront Airport and are steadily increasing. The large yellow-orange area on radar moving into the metro area from east to west with both torrential rains and wind gusts that will gust well above 80 mph, especially on the east side of the area.

Here is the new tornado watch in effect until 7am.

Comments

  1. The MonsterAugust 28, 2012 at 7:31 PM

    Any sign of the storm surge pushing up into Pontchartrain? That's always my biggest concern for NOLA; the counterclockwise winds can push the gulf into the "Lake", then push the lake over the top of the levee on its southern shore.

    ReplyDelete
  2. Mike SmithAugust 28, 2012 at 7:48 PM

    Here is the latest observation from Lakefront: KNEW 290041Z 03045G56KT 3/4SM -SN BKN022 OVC030 A2940 RMK AO2 PK WND 03057/0006 SNB17 P0014

    Note: The raindrops are being broken up by the 65 mph gusts and the sensors thinks they are snow!

    I think there is a possibility they could see a 90+mph wind gust if the eye moves far enough NW. That is when the new levees will get the test.

    ReplyDelete

Post a Comment

Popular posts from this blog

The East Coast Severe Weather Threat is Over

By -
Image
Midnight: The East Coast Threat for Tornadoes and Severe  Thunderstorms Has Ended 3:50pm. Tornado watch for the Middle Atlantic Region. 2:30pm Tornadoes are also forecast in the South. 2:20pm. A couple of tornadoes, hail and wind gusts to 65 mph are possible with these storms. This includes NYC and Philadelphia.  1:05pm. The tornado risk has been extended northward into New York. The brown area has a significant risk of tornadoes. Remember: if a tornado warning is issued, go to your basement and get under heavy furniture like a pool table. Of, if your basement is finished, get into the bathroom. Go ahead an put a couple of water bottles and, if appropriate, diapers in your shelter area. Wear shoes.  If you don't have a basement or safe room, go to the lowest floor and get into a bath or closet in the middle of your home. Children should be put in the bathtub.  I'll update later today. 
Read more

Today's Tornado and Severe Thunderstorm Outlook - 9:30pm

By -
Image
After 65 mph winds went through Wichita, we have been without power for 35 minutes. So, I am going to have to end coverage for the night (using backup systems to write this). Scroll down for the forecast of tornadoes and severe thunderstorms for Sunday and Sunday night.  Please read down for the latest forecasts regarding this dangerous tornado and damaging wind situation! 5:40pm, a new "regular" tornado watch has been issued for north central Kansas.  Note that wind gusts to 80 mph are likely in this storm in addition to tornadoes and giant hail. Please make sure friends and relatives in the area are aware of the danger in the area outlined in red below plus the red area outlined at 2:50pm  In addition to "several strong tornadoes," hail to 4.8" in diameter is forecast along with wind gusts to 80 mph. Now is the time for persons living in mobile homes, manufactured homes and those with mobility issues should be making plans!!  Do not wait until a tornado warn
Read more

Updated Freezing Rain and Heavy Rain Forecast

By -
Image
Note: An Updated Forecast is Available HERE Freezing Rain The National Weather Service has now issued winter weather advisories, two warnings and a watch. It may be a bit too large but, when it comes to freezing rain and slick roads, caution is usually the better course of action.  Here's a color code: Deep purple is an ice storm warning; serious condition where power outages are possible. Pink is a winter storm warning for significant icing. Deep green is a winter storm watch. I don't know why this is still a watch. If I were on the forecast desk I would have a winter storm warning for icing.  Dark blue is a winter weather advisory, a lesser condition, for icing.  Here is a view of the entire watch/warning/advisory area. The small area of green in Illinois is for flooding and, in Nebraska, for snow.  Here is a forecast of freezing rain amounts; totals to 6am Tuesday.  Color codes: Yellow is 0.25 to 0.50 inches. Power outages may occur in this areas. Deep blue is 0.1 to .25 inc
Read more