Dr. Jeff Masters' WunderBlog

Tropical Storm Chris forms; little change to Cuba disturbance; Duluth floods
Posted by: Dr. Jeff Masters, 01:33 PM GMT on iunie 20, 2012 +42
Tropical Storm Chris formed Tuesday evening from a extratropical storm that spent enough time over waters of 24 - 26°C to acquire tropical characteristics. Chris is headed eastwards, out to sea, and will not trouble any land areas. Only twice before, in 1887 and 1959, has the third storm of the season formed earlier than this date. Formation of three tropical storms so early in the year is not necessarily a harbinger of an active season; 1959 was close to average, with 12 named storms, 7 hurricanes, and 2 intense hurricanes (average is 11 named storms, 6 hurricanes, and 2 intense hurricanes.) Unusual levels of early season activity in the Caribbean and between Africa and the Lesser Antilles usually portends a very active hurricane season, but this year's storms have not formed in this region. Alberto, Beryl, and Chris all formed off the U.S. East Coast.


Figure 1. Morning satellite image of Chris.

Disturbance near Cuba will bring heavy rains to Florida
An area of low pressure and heavy thunderstorms centered just south of Cuba has changed little since Tuesday, and is bringing sporadic heavy rains to Jamaica, the Cayman Islands, South Florida, the Southern Bahamas, and Cuba. This disturbance will need to be watched for development as it drifts slowly northwest at about 5 mph and enters the Gulf of Mexico late this week. The disturbance is poorly organized, and has only a modest area of heavy thunderstorms. Wind shear is a moderate to high 15 - 25 knots over the region, and the shear is predicted to remain in the moderate to high range for the next three days along the disturbance's path. Water vapor satellite loops show a region of dry air over the Southern Gulf of Mexico; strong upper-level winds out of the northwest are bringing some of this dry air into the vicinity of the disturbance, which is interfering with development. NHC is giving the disturbance a 20% chance of developing into a tropical depression by Friday morning. As the disturbance reaches the waters off the southwest coast of Florida this weekend, a strong trough of low pressure pushing off of the U.S. East Coast will be capable of grabbing the storm and accelerating it to the northeast. This is the solution of the GFS model, which takes the storm across Florida on Sunday, and into the waters off the coast of South Carolina by Monday, with the disturbance developing into a tropical or subtropical storm off the coast of South Carolina. None of the other reliable computer models is showing development of the disturbance into a tropical depression. I think it is unlikely that heavy rains from this disturbance will affect Louisiana and Texas, but it will bring heavy rains to Southwest Florida and Cuba over the next five days.


Figure 2. Morning satellite image of the tropical disturbance near Cuba.


Figure 3. Rainfall for the 5-day period ending at 8am EDT Monday as predicted by NOAA's Hydrometeorological Prediction Center. Amounts in excess of five inches (orange colors) are predicted for Southwest Florida, with an area of ten inches (yellow colors) just off the coast.

Major flooding in Duluth, Minnesota
A serious flood emergency is occurring in Duluth, Minnesota. A series of "training" thunderstorms that all passed over the same region have dumped 4 - 5 inches of rain over a wide swath of Northern Minnesota overnight and early this morning. Nearly 8 inches of rain fell in the Denfeld area of western Duluth. This is more rain than fell in the city's previous worst flood on record, which occurred August 20, 1972. Major flooding is occurring, and only emergency travel is recommended in the city due to flooded roads. A flash flood warning from the Duluth National Weather Service issued at 7am CDT said this:

We cannot stress what a major threat this is for the city of Duluth
and along the North Shore. Aging infrastructure will also play a
part in the flood threat... especially on the hillside. Highway 61
remains closed in spots with washouts... overflowing streams and
rivers...washed out culverts and washed out roads. Just because you
might be able to travel to a destination now... does not mean you
will make it in one to two hours. This is how fast this situation
may deteriorate as more rainfall moves in from the west. There is
the potential for several more inches of rain today and the utility
system and the saturated ground cannot take much more rain.


According to wunderground's weather historian, Christopher C. Burt, the all-time 24 hour precipitation record for Duluth is 5.79" on 8/22 - 8/23 1978; 4.14" was recorded on Tuesday at the airport.


Figure 4. Radar-estimated rainfall from the Duluth, Minnesota radar.

Jeff Masters
storm damage June 19 (CythiaSue)
there is another car buried on the other side of the road. This is just some of the storm damage from a 4 am rain and thunderstorm
storm damage June 19
Categories: Hurricane Flood
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2501. JrWeathermanFL 02:55 PM GMT on iunie 21, 2012    
Ok, Chris is a hurricane.
Now, as blog tradition, lets turn our attention somewhere else
:) jk
Member Since: iulie 19, 2011 Posts: 7 Comments: 1051
2502. GeorgiaStormz 02:57 PM GMT on iunie 21, 2012    
I WANT 96L!!!
Member Since: februarie 11, 2012 Posts: 0 Comments: 7165
2503. Patrap 02:57 PM GMT on iunie 21, 2012    
Member Since: iulie 3, 2005 Posts: 372 Comments: 111626
2504. CybrTeddy 02:57 PM GMT on iunie 21, 2012    
All I can say - WAY more impressive than the last Chris.
Member Since: iulie 8, 2005 Posts: 253 Comments: 20278
2505. weatherman321 02:57 PM GMT on iunie 21, 2012    
haha had to post this "Everybody Hates Chris!!"
Member Since: august 23, 2008 Posts: 0 Comments: 139
2506. yqt1001 02:57 PM GMT on iunie 21, 2012    
I think we should give a huge congratulations! Chris is pretty much a more epic version of Vince, in June at like 40N.

I cannot wait until post season to see what the NHC says. Oh well, the thought of a weak puny and lame Chris dies today!
Member Since: noiembrie 19, 2010 Posts: 1 Comments: 1184
2507. TropicalAnalystwx13 02:58 PM GMT on iunie 21, 2012    
It appears Chris timed his upgrade to hurricane status perfectly as it has now probably reached its peak and will begin weakening. Convection is beginning to weaken.

Member Since: iulie 6, 2010 Posts: 89 Comments: 25347
2508. washingtonian115 02:58 PM GMT on iunie 21, 2012    
Quoting JrWeathermanFL:
Ok, Chris is a hurricane.
Now, as blog tradition, lets turn our attention somewhere else
:) jk
Yes when or if Debby forms we will turn our attention twards Africa.
Member Since: august 14, 2010 Posts: 5 Comments: 10675
2509. jascott1967 02:58 PM GMT on iunie 21, 2012    
Quoting GeorgiaStormz:


a foot of water.......... ?
how do they know that already? :)


Fetch. High winds (doesn't even have to be associated with a storm), long body of water of which it traverses. Texas could call for coastal flooding anytime. In fact, the same could be said for anywhere along the gulf coast because of the amount of time those storms have been in or near the GoM.
Member Since: august 16, 2007 Posts: 0 Comments: 516
2510. stormchaser19 02:58 PM GMT on iunie 21, 2012    
OMG!!!! NHC officially call chris hurricane, can anyone remember me when a hurricane forms so far to north?
Member Since: iunie 20, 2012 Posts: 0 Comments: 1379
2511. windshear1993 02:59 PM GMT on iunie 21, 2012    
Quoting JrWeathermanFL:
Ok, Chris is a hurricane.
Now, as blog tradition, lets turn our attention somewhere else
:) jk
i agree feels good to hear thatchirs is a hurricane now we have to look at future debby which is don with a vengeance but he got his big sister
Member Since: iunie 1, 2012 Posts: 0 Comments: 66
2512. AllStar17 03:00 PM GMT on iunie 21, 2012    
11:00AM ADVISORY
(click to enlarge)
Member Since: iunie 29, 2009 Posts: 13 Comments: 5135
2513. Bobbyweather 03:00 PM GMT on iunie 21, 2012    
.
Quoting stormchaser19:
OMG!!!! NHC officially call chris hurricane, can anyone remember me when a hurricane forms so far to north?

according to a past comment by CybrTeddy,
Chris is the northernmost June hurricane on record
Member Since: septembrie 7, 2006 Posts: 88 Comments: 2470
2514. RTSplayer 03:00 PM GMT on iunie 21, 2012    
See, if you look closely on the low cloud product, this system is drier than Alex and farther north, but it has a similar environmental structure, in that it's sort double nested in this much larger envelope. It just needs to moisten up the environment a lot more, which it's clearly doing.

Expect it to cover most of the Gulf when the convection finally does wrap around. Will be very, very large.

It really deserves an invest and a flight to help find the dominant CoC and get a better model initialization.
Member Since: ianuarie 25, 2012 Posts: 27 Comments: 875
2515. wxmod 03:00 PM GMT on iunie 21, 2012    
5000 mile wide satellite photo comparing the Russian wildfire state of emergency (upper left) and the day to day China smog (lower right). MODIS

Member Since: octombrie 4, 2011 Posts: 0 Comments: 1234
2516. bohonkweatherman 03:01 PM GMT on iunie 21, 2012    
Quoting RitaEvac:


I like what you say at the end, "forecasts stills call for hot and sunny along here, but looks to be busted"


If Debbie develops and moves to Texas we get rains we really need if it moves to Florida most likely record heat here next week, come this way Debbie. :) Hope Levi is right but we shall see? Like flipping a coin my guess is Florida and the trough picking storm up but this is a tough one to forecast right now until Storm develops.
Member Since: iulie 5, 2009 Posts: 0 Comments: 1348
2517. MudMinnow 03:01 PM GMT on iunie 21, 2012    
Regarding the Louisiana flooding thats been brought up. It's not a forecast from the low at the Yucatan now. Louisiana has had strong Easterly winds 15-20knots for 4 days now. Due to ekman transport, water is piling up and tides have been 1 foot above normal. A flood warning has been issued for low lying areas which is typical.
Member Since: august 26, 2006 Posts: 0 Comments: 0
2518. Patrap 03:02 PM GMT on iunie 21, 2012    
Orleans Parish

Coastal Flood Advisory

Statement as of 3:44 AM CDT on June 21, 2012

... Coastal Flood Advisory remains in effect until 7 am CDT
Saturday...

* coastal flooding... minor coastal flooding of less than one
foot expected.

* Timing... flooding will occur during each high tide cycle.
Highest tides will occur in the afternoon hours.

* Impacts... minor overwash of low lying roadways in the
immediate vicinity of the coast. Flooding will be less than
one foot.

Precautionary/preparedness actions...

A coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.
Member Since: iulie 3, 2005 Posts: 372 Comments: 111626
2519. Jax82 03:02 PM GMT on iunie 21, 2012    
according to the 850MB, the spin is still northwest of that area of deep convection.

Member Since: septembrie 2, 2008 Posts: 1 Comments: 1261
2520. windshear1993 03:02 PM GMT on iunie 21, 2012    
if debby forms will it become the earliest 4th named storm
Member Since: iunie 1, 2012 Posts: 0 Comments: 66
2521. RTSplayer 03:03 PM GMT on iunie 21, 2012    
Quoting AllStar17:
11:00AM ADVISORY
(click to enlarge)


Incredible that a pop-up wave that far north could become a legit hurricane. I've Never seen anything like it.
Member Since: ianuarie 25, 2012 Posts: 27 Comments: 875
2522. Patrap 03:03 PM GMT on iunie 21, 2012    
Gulf Of Mexico - False Color RGB Loop

The Low Level Swirl takes up the Whole Eastern GOM
Member Since: iulie 3, 2005 Posts: 372 Comments: 111626
2523. WunderAlertBot (Admin) 03:03 PM GMT on iunie 21, 2012    
JeffMasters has created a new entry.
2524. Jax82 03:04 PM GMT on iunie 21, 2012    
This weeks drought monitor.

Member Since: septembrie 2, 2008 Posts: 1 Comments: 1261
2525. chevycanes 03:04 PM GMT on iunie 21, 2012    
long range radar out of key west might just be playing tricks on my eyes but looks like there is a spin just NW of Cuba.
Member Since: august 6, 2007 Posts: 0 Comments: 687
2526. RTSplayer 03:04 PM GMT on iunie 21, 2012    
Quoting Jax82:
according to the 850MB, the spin is still northwest of that area of deep convection.



Exactly.

The dominant low is very, very big and broad, but it's starting to get it's act together.

You'll be able to see changes literally on a 30 minute to hour basis with the LSU products, they are by far the best visually for watching systems like this.
Member Since: ianuarie 25, 2012 Posts: 27 Comments: 875
2527. LargoFl 03:05 PM GMT on iunie 21, 2012    
Member Since: august 6, 2011 Posts: 0 Comments: 22426
2528. HouGalv08 03:05 PM GMT on iunie 21, 2012    
Excellent post by Levi32 ! Like he said, we need a LLC for the models to munch on to get a better picture. Debby will take aim from Brownsville to Key West. The entire gulf coast needs to pay attention.
Member Since: iulie 21, 2008 Posts: 0 Comments: 313
2529. redwagon 03:05 PM GMT on iunie 21, 2012    
Quoting weatherh98:


That's the mid level

Where.... do you tag the llc?
Member Since: august 4, 2007 Posts: 0 Comments: 1444
2530. bohonkweatherman 03:06 PM GMT on iunie 21, 2012    
http://droughtmonitor.unl.edu/DM_state.htm?TX,S
Member Since: iulie 5, 2009 Posts: 0 Comments: 1348
2531. windshear1993 03:07 PM GMT on iunie 21, 2012    
if debby forms will it become the earliest 4th named storm?
Member Since: iunie 1, 2012 Posts: 0 Comments: 66
2532. cheaterwon 03:10 PM GMT on iunie 21, 2012    
Quoting CajunCrawfishhunter:
IM just glad to see Louisiana hasnt been mentioned... all this talk of Texas and Florida..



Well it does seem that you are in the middle of the dart board that everyone is throwing at. Which isn't the safest place to be.
Member Since: august 5, 2010 Posts: 0 Comments: 199
2533. 10FootPole 03:14 PM GMT on iunie 21, 2012    
Quoting 2481. Patrap:

Be a adult.

Poof!
Member Since: august 17, 2011 Posts: 0 Comments: 3
2534. islander101010 04:01 PM GMT on iunie 21, 2012    
guess.is.up.the.rio.grand.valley.trigger.the.beginn ing.of.the.western.moonsoon.season
Member Since: septembrie 11, 2010 Posts: 0 Comments: 2968
2535. 19N81W 04:35 PM GMT on iunie 21, 2012    
pretty far north for a hurricane?
Member Since: august 24, 2008 Posts: 0 Comments: 332
2536. nola70119 07:27 PM GMT on iunie 21, 2012    
Just using my eyeballs here by the bayou-- I think that high which has been sitting on top of New Orleans is starting to weaken.....clouds filling, and mot much movement in the upper levels.
Member Since: iunie 16, 2006 Posts: 0 Comments: 1535
2537. plutorising 07:34 PM GMT on iunie 21, 2012    
stupid question here, but i can't find an answer elsewhere - why is it called 'invest' and why is this one 'at'?

humble thanks.
Member Since: august 30, 2008 Posts: 0 Comments: 73
2538. stillwaiting 02:55 PM GMT on iunie 22, 2012    
.
Member Since: octombrie 5, 2007 Posts: 20 Comments: 4970
2539. PRweathercenter 02:49 AM GMT on iunie 27, 2012    
Caribbean Storm Update with Dave

img src="">

Link
Member Since: iulie 21, 2010 Posts: 58 Comments: 916

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About JeffMasters
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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