jeudi 6 février 2014

Winter Weather Live Updates: Winter Storm Orion Roars into Pacific Northwest

http://www.weather.com/news/weather-winter/winter-storm-live-updates-snow-ice-latest-20131106

Hurricanes & Tropical Cyclones

European Storm Forecast Experiment

Storm Forecast
Storm Forecast
Valid: Fri 07 Feb 2014 06:00 to Sat 08 Feb 2014 06:00 UTC
Issued: Thu 06 Feb 2014 17:22
Forecaster: TUSCHY
Two level 1 areas were issued for SE-France, the Vosges and NW/W-C Italy mainly for excessive rain. Coastal areas also see an isolated large hail, severe wind gust and tornado risk.

A level 1 was issued for SW-UK mainly for severe wind gusts and an isolated tornado event.

Guernsey endures 'horrendous' weather U K

Waves crash in Alderney Alderney has been affected by wind and high tides

Related Stories

A severe storm with conditions described as "horrendous" has battered Guernsey's east coast overnight.
Alderney coastal defences were attacked by huge waves, although the roads and buildings remained flood free.
Guernsey suffered as wind speeds hit Storm Force 10 - with ten trees downed around the island.
Parked cars floated from their spaces as flooding caused the closure of the bulk of the coast road, between Bulwer Avenue and the Val De Terres.
Alderney's Harbourmaster, Mark Gaudion, filmed the high waves
The Rohais Du Haut, Saline Road and the Hougue Mague are still closed but police said the rest of Guernsey's main roads were now clear.
Chad Murray, the harbourmaster in Guernsey, said: "Some of the boats that had been laid up for winter maintenance have now fallen off their blocks and are lying on their side.
"Others are precariously balanced, so we've had to close off the area."
Castle Emplacement was one of the worst hit areas.
Police described conditions on Guernsey overnight as "horrendous" with "extensive damage" in the Castle Emplacement area.
About 300 homes in St Peter Port lost power during the height of the storm after an electricity sub-station flooded.
A parked car with water up to its wheelsThe east coast was battered by waves nearly 40ft high
Waves break over the wall at St Peter PortThe high tide has caused havoc at St Peter Port
Waves crash against east coastWaves up to 40ft tall have been crashing against the sea wall
Waves crashed over harbour walls in GuernseyHomes lost power while cars floated from their spaces in car parks
The front of Harbour house with two parked cars out the frontBars continued to serve as the water levels rose last night
A view of the seaWinds of up to 60mph forced the waves to reach inland                                    http://www.bbc.co.uk/news/world-europe-guernsey-26046894

mercredi 5 février 2014

HEAVY SNOW,FREEZING RAIN

Valid MD Image
MD Legend Image

MD0075 Thumbnail ImageMesoscale Discussion #0075
Issued: 05/1039 UTC
Until: 05/1445 UTC
Concerning: HEAVY SNOW


MD0074 Thumbnail ImageMesoscale Discussion #0074
Issued: 05/0823 UTC
Until: 05/1330 UTC
Concerning: HEAVY SNOW


MD0073 Thumbnail ImageMesoscale Discussion #0073
Issued: 05/0557 UTC
Until: 05/1100 UTC
Concerning: HEAVY SNOW


MD0072 Thumbnail ImageMesoscale Discussion #0072
Issued: 05/0544 UTC
Until: 05/1045 UTC
Concerning: FREEZING RAIN

mardi 4 février 2014

probability of freezing rain reaching or exceeding 0.25 inch for Days 1

Prévision nationale des risques orageux


PREVISION GLOBALE TOUS RISQUES CONVECTIFS
PROBABILITE DE TORNADE
QUALIFICATION GENERALE DU RISQUE CONVECTIF...
Risque orageux diffus dans le sud-est puis arrivée d'une traîne active dans un contexte tempétueux dans le nord-ouest la nuit prochaine.
 
 
ANALYSE SYNOPTIQUE ET DE MESO-ECHELLE...
Un thalweg d'altitude étroit et peu dynamique est positionné sur le centre du pays ce matin. Il migre vers l'est pour évacuer la France en fin de journée.
Parallèlement, un nouveau système dépressionnaire arrive par l'ouest ce mardi après-midi. La dépression tempétueuse Petra, qui s'est creusée de manière explosive la nuit dernière au sud-ouest de l'Irlande, pilote une perturbation active qui balaie tout le pays d'ici la fin de nuit prochaine. A l'arrière du front froid, le thalweg d'altitude gagne l'ouest de la France avec un nouveau refroidisssement sensible de la masse d'air à l'étage moyen, ainsi favorable au développement de la convection de masse d'air froid.