Seguimiento general en EEUU

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 3:42 pm

Center, Texas.
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Loop del sudeste de Estados Unidos.
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Dome, dome, dome..The life is a dome

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 3:51 pm

PDS TOR WATCH! :shock:
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URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 110
NWS Storm Prediction Center Norman OK
135 PM CDT Sun Apr 2 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Central and Northern Louisiana
West-central Mississippi
East Texas

* Effective this Sunday afternoon and evening from 135 PM until
900 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

* Primary threats include...
Numerous tornadoes and several intense tornadoes expected
Widespread large hail and scattered very large hail events to 3
inches in diameter likely
Widespread damaging wind gusts to 70 mph likely

SUMMARY...A dangerous combination of parameters suggests that
tornadoes will occur over parts of east TX, northern and central LA,
and eastern MS this afternoon and evening. Strong tornadoes are a
concern.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 85 miles west of Fort Polk LA to 65
miles northeast of Natchez MS. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 109...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 23035.

...Hart

Alexandria..Estas nominada! :shock:
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Dome, dome, dome..The life is a dome

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 4:03 pm

IMPRESIONANTE LO QUE VA A ALEXANDRIA! YA HAY TDS(TORNADO DEBRIS SIGNATURE).
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Dome, dome, dome..The life is a dome

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 4:14 pm

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Mesoscale Discussion 0404
NWS Storm Prediction Center Norman OK
0206 PM CDT Sun Apr 02 2017

Areas affected...Portions of far east Texas into central LA

Concerning...Tornado Watch 110...

Valid 021906Z - 022000Z

The severe weather threat for Tornado Watch 110 continues.

SUMMARY...The risk for significant tornadoes is increasing across
Particularly Dangerous Situation Tornado Watch 110.

DISCUSSION...Echo tops in association with supercell clusters and
quasi-linear convective segments containing embedded supercells have
exhibited notable increasing trends per radar imagery. This activity
is intensifying within a warm advection plume preceding a midlevel
shortwave trough spreading across Texas. Pressure falls have been
increasing in magnitude within the open warm sector from parts of
the lower Sabine Valley eastward through central LA, south of a warm
front analyzed from south of Shreveport to north of Alexandria LA.
This suggests that increasing deep ascent will continue to encourage
convective sustenance/intensification. The VAD wind profile at POE
indicates a substantially curved hodograph in the lowest 3 km above
ground, with around 400 m2/s2 of 0-1-km SRH. Rotating updrafts will
remain likely as convection spreads eastward/east-northeastward
across the region. The risk for significant tornadoes is increasing,
along with damaging winds and severe hail.

..Cohen.. 04/02/2017
Dome, dome, dome..The life is a dome

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 4:26 pm

Ya están en TORNADO EMERGENCY.
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Dome, dome, dome..The life is a dome

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maatii96
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Re: Seguimiento general en EEUU

Mensajepor maatii96 » Dom Abr 02, 2017 4:36 pm

Marche un tornado watch en PDS...

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 110
NWS Storm Prediction Center Norman OK
135 PM CDT Sun Apr 2 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Central and Northern Louisiana
West-central Mississippi
East Texas

* Effective this Sunday afternoon and evening from 135 PM until
900 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

* Primary threats include...
Numerous tornadoes and several intense tornadoes expected
Widespread large hail and scattered very large hail events to 3
inches in diameter likely

Widespread damaging wind gusts to 70 mph likely

SUMMARY...A dangerous combination of parameters suggests that
tornadoes will occur over parts of east TX, northern and central LA,
and eastern MS this afternoon and evening. Strong tornadoes are a
concern.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 85 miles west of Fort Polk LA to 65
miles northeast of Natchez MS. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 109...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 23035.

...Hart

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 4:42 pm

maatii96 escribió:Marche un tornado watch en PDS...

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 110
NWS Storm Prediction Center Norman OK
135 PM CDT Sun Apr 2 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Central and Northern Louisiana
West-central Mississippi
East Texas

* Effective this Sunday afternoon and evening from 135 PM until
900 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

* Primary threats include...
Numerous tornadoes and several intense tornadoes expected
Widespread large hail and scattered very large hail events to 3
inches in diameter likely

Widespread damaging wind gusts to 70 mph likely

SUMMARY...A dangerous combination of parameters suggests that
tornadoes will occur over parts of east TX, northern and central LA,
and eastern MS this afternoon and evening. Strong tornadoes are a
concern.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 85 miles west of Fort Polk LA to 65
miles northeast of Natchez MS. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 109...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 23035.

...Hart

Ya lo puse arriba! ;)
Para no offtopiquearla mucho, les dejo el IMPRESIONANTE sondeo de las 19z de Monroe, Louisiana. Pegate una vuelta, eh! :shock: Igual, no resuelve vigilancia porque no estan muy inestables(lo unico rescatable, son los mas de 1.000J/Kg en superficie).
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Columbia, Louisiana.
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Dome, dome, dome..The life is a dome

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stormchaserAlberto
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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 4:57 pm

Primeras imagenes que van llegando tras el paso del tornado en Alexandria, Louisiana. Dejo mucha destruccion.
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Dome, dome, dome..The life is a dome

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maatii96
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Re: Seguimiento general en EEUU

Mensajepor maatii96 » Dom Abr 02, 2017 5:07 pm

Mala mía :P

Miren que bonita línea severa

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Re: Seguimiento general en EEUU

Mensajepor stormchaserAlberto » Dom Abr 02, 2017 5:14 pm

Nueva actualizacion del SPC. Continua el riego alto para el norte de Louisiana.
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% de tornados.
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% de vientos.
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% de granizo.
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Discusion:
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Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0259 PM CDT Sun Apr 02 2017

Valid 022000Z - 031200Z

...THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF
NORTHERN LOUISIANA...

...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS OVER MUCH OF
LOUISIANA INTO MISSISSIPPI...

...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM THE SABINE
RIVER VALLEY EASTWARD ACROSS THE LOWER MISSISSIPPI VALLEY...

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE TEXAS
COAST ACROSS THE LOWER MISSISSIPPI RIVER VALLEY...

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS SURROUNDING THE
SLIGHT RISK AREA...

...SUMMARY...
Widespread severe thunderstorms capable of significant tornadoes,
severe wind, and severe hail will spread from the Sabine river
valley toward the lower Mississippi Valley through tonight. The
greatest risk for tornadoes will exist from across Louisiana into
Mississippi this afternoon through tonight.

...East Texas into Louisiana and western Mississippi...
Storms continue to evolve across the area, with the most intense
cells near the warm front over central LA, and along and just ahead
of the cold front/outflow boundary over far eastern TX. South of
these boundaries, the air mass is very moist and unstable with gusty
southeasterly winds allowing for a gradual northward shift in the
greater instability across LA and into southwest MS. Shear profiles
strongly favor supercells along with tornadoes, with effective SRH
on the order of 400-600 m2/s2 observed on area VAD wind profiles.
The area will continue to experience a severe threat for many more
hours until the cold front moves through from the west. While only a
few of the numerous storms are currently severe, the environment
will remain quite favorable and further intensification of storms is
expected throughout the afternoon and into the evening. For more
information see MCD 403, 404 and 405.

..Jewell.. 04/02/2017

.PREV DISCUSSION... /ISSUED 1127 AM CDT Sun Apr 02 2017/

...Portions of east Texas to the lower Mississippi Valley through
tonight...
A long-lived thunderstorm cluster that crossed central Texas through
the overnight/morning hours is losing organization as it is
advancing into east Texas. Convection continues to form ahead of the
remnant outflow boundary related to the cluster -- from parts of the
Upper TX Coast through the lower Sabine Valley region within a
warm-advection plume. This plume of warm advection is associated
with an amplifying midlevel shortwave trough, whose accompanying
midlevel speed maximum is emerging over south Texas. As the
shortwave trough continues to advance eastward, the low-level mass
response will facilitate poleward return of rich boundary-layer
moisture -- e.g., 15 g/kg mean mixing ratio per Lake Charles 12Z
observed sounding. As such, an expansive warm sector associated with
MLCAPE around 1500-3000 J/kg will become established through the
afternoon from the western/central Gulf Coast northward to a
precipitation-reinforced warm frontal zone forecast to extend from
part of east-central TX eastward across northern Louisiana.

With open-warm-sector convective development now becoming apparent
ahead of the remnants of the convective cluster, it is expected that
this activity will mature as it interacts with the
northward-advancing warm frontal zone. This is where effective SRH
around 300-400 m2/s2 amid strong deep shear and increasing buoyancy
will exist. Given increasing confidence in semi-discrete
supercells/supercell clusters interacting with this warm frontal
zone around peak heating, confidence has increased in greater
tornado potential -- including significant tornadoes -- across the
now-upgraded High Risk area. The significant-tornado potential will
spread toward the lower Mississippi Valley into the evening hours.

Into the evening and overnight hours tonight, a band of warm
advection/confluence will facilitate the development of a
pre-frontal squall line that will advance eastward across parts of
LA/MS and far southern AR. In addition to the potential for
extensive wind damage, meso-vortices and embedded supercells capable
of producing tornadoes are expected to spread eastward through the
lower Mississippi Valley into the overnight hours. Increased
confidence in this scenario warrants eastward extension of the
Moderate Risk area.

Proxima actualizacion: 01:00z.
-------------------------------------------------------------------------------
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Mesoscale Discussion 0405
NWS Storm Prediction Center Norman OK
0308 PM CDT Sun Apr 02 2017

Areas affected...Portions of southeast LA and southern MS

Concerning...Severe potential...Watch possible

Valid 022008Z - 022245Z

Probability of Watch Issuance...40 percent

SUMMARY...The area is being monitored for increasing severe
thunderstorm potential from the west. It is uncertain whether this
potential will extend into areas east of ongoing Watch 110 in the
short-term. However, the risk for severe storms will increase later
this evening into tonight, when watch-issuance probabilities may
increase.

DISCUSSION...Isentropic ascent within a moist/weakly capped air mass
continues supporting an area of open-warm sector supercell clusters
across south-central LA. The 18Z Slidell LA sounding sampled around
2000-2500 J/kg of MLCAPE, characterizing the inflow over the
southern extent of the aforementioned convection. With 40-50 kt of
effective shear, and 250-400 m2/s2 of effective SRH, conditional
risk for tornadoes, severe hail, and severe wind will exist. Given
the breadth of the warm sector, and continued moistening from the
south, there is some potential for the aforementioned convection to
spread into the area from the west in the short-term, or perhaps
convection could develop across the MCD area. Regardless, confidence
in sustained severe convection is limited at present. The
severe-thunderstorm/tornado potential will increase into the evening
hours as comparatively stronger deep ascent approaches the area from
the west.

..Cohen/Hart.. 04/02/2017

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Mesoscale Discussion 0406
NWS Storm Prediction Center Norman OK
0313 PM CDT Sun Apr 02 2017

Areas affected...Louisiana

Concerning...Tornado Watch 110...

Valid 022013Z - 022145Z

The severe weather threat for Tornado Watch 110 continues.

SUMMARY...Threat for a few strong tornadoes will persist next couple
hours with discrete storms developing through central LA. In
addition, the squall line may pose a risk for a few QLCS tornadoes
as well as significant wind damage and hail as it advances east
through LA.

DISCUSSION...Discrete supercells continue to mature as they develop
north and interact with warm front across central LA where VWP data
show large low-level hodographs with 0-1 km storm relative helicity
from 300-400 m2/s2. Tornadoes, a few of which will be strong, will
remain likely with these storms this afternoon. Farther west a
squall line is advancing east at around 40 kt. Organized structures
continue to be observed within the line including bowing segments,
embedded supercells and mesovortices. In addition to damaging wind,
QLCS tornadoes are likely as the squall line continues east and
especially where the line intersects the warm front across central
LA.

..Dial.. 04/02/2017
Dome, dome, dome..The life is a dome


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