[DG57]

ça y est ! Back in Nice for two months, and as soon as I get out of the plane, I felt the smothering heat ! I left Strasbourg with 16/18°C and I arrived in Nice with a 32/33°C (near 40 Humidex).

[DG57]

Between end of June and beginning of August (1 month and a half), the Mediterranean sea between Perpignan and Marseilles was more like the Atlantic coast regarding the temperatures. Indeed, there has been quite a high number of cloudy days *plus* not so hot *plus* a lot of Mistral and Tramontane, which resulted of a upwelling phenomenon, the cold sea in the depths is going up to the coasts. Thus, on some days, the sea temperature was only of 18 or 19°C, that is to say more than 5°C less than the normals.

On the contrary, sea temperature on the Riviera (from Hyères to Menton by Cannes and Nice) was more normal during that period (barely-barely below normals), so bathing was more pleasant.

http://video.fr.msn....13q08xl55?from=

[DG57]

Hot day across France today. The hot spell is being forecasted to last until next Monday, with very warm minimums, even inland, and hot maximums.

Temperatures are not meant to get below 20°C in Lyon, and 18/19°C in a lot of regions ; 22°C to 24°C in the Mediterranean, in an extended way (that is to say not only the Riviera, but also the coast from Marseilles to the Spanish border).

Maximums have been up to near 38°C today in the northeastern part of the SW (that is to say west and southwest of the Massif Central).

Of course, this will result of some strong localized thunderstorms, particularly in the West Central region northwards into Paris region. No alert, however, since it will deal with normal summer convective development.

[DG57]

Already unpleasant heat this morning when you stay inside, in Nice. Today : beach day !

Current temperature around 30°C (11am), humidex above 35.

[DG57]

Vigilance Orange Canicule (orange alert for heatwave) has been decreed in two departments of the East Central zone of the country : la Loire and le Rhône.

http://france.meteofrance.com/vigilance/Accueil

Why ?

Three combined facts :

- very high temperatures in the afternoon (39 to 40°C),
- these ones, during for at least 3 consecutive days,
- and with overnight temperatures above 25/30°C, and getting to 21/22°C only early in the morning and for half an hour to one hour only (the human body thus can't really relieve).

Tips for vulnerable persons :

http://france.meteofrance.com/france/actu/actu?portlet_id=78817&document_id=25542

[DG57]

Extreme humidex in Brive-la-Gaillarde : 45.6 at 6pm. And a lot of 43 and 44 in the SW...

[DG57]

Here are the six stations recording over 40°C, yesterday. Two of them are situated in the Tarn-et-Garonne department, in the centre of the SW.

Climate of the Tarn-et-Garonne : http://fr.wikipedia....Tarn-et-Garonne

Absolute heat record of the department : Caylus, with 42.4°C.

[DG57]

Here it is ! Infoclimat V.5 (new version with a lot of new features) is out !

http://www.infoclimat.fr/accueil/

http://www.infoclimat.fr/historic/ (this part is devoted to every single exceptional -or less exceptional- weather event, from 1653 to nowadays in France)

[Dave K]

Some major thunderstorms in prospect for NW and locally in SE France, "Des orages de forte intensité sont attendus ce lundi des Pays-de-la-Loire au Nord - Pas de Calais, ainsi que plus localement dans le sud-ouest."

see http://www.keraunos.org/actualite-fil-info-orage-tornade-france.htm for more.

[Dave W]

See also discussion here as well http://www.ukweather...d=44536&posts=5

[Dave K]

At Angers, 1 hour rainfall accumulation of 26.8 mm ( metar/synop ).

41mm at La Salle-et-Chapelle Aubry (Between nantes and Angers).

[fullerphotos]

Angers appears to have been subject to a deluge this morning.

http://www.ouest-france.fr/actu/actuDet_-Orages.-Vigilance-orange-dans-l-Ouest-de-la-France_39382-1914776_actu.Htm

and when day became night.

http://www.ouest-france.fr/actu/actuLocale_-Il-est-11-h-du-mat-a-Angers-et-il-fait-nuit-noire-_40774-1914735------49007-aud_actu.Htm

[DG57]

Thanks guys,

Hot night between Nice and Genoa.

25.0°C at Eze, 25.5°C at Nice, 25.7°C at Valbonne-Sophia and 27.2°C at Menton (usually/averagely the warmest town at night in continental France, though quite an unusual value).

[DG57]

http://meteo-climat-...ee=2011&heure=9

http://meteo-climat-...e=2011&heure=21

As it appears to be the hottest day of the year in France, I'm publishing here a small Excel table, typical of those of my Months threads.

Saint-Martin-d'Estréaux must have broken its own record, but I don't have all the data of the station.

Edit : of course, you have rectified the error yourself, for Menton (Riviera), it is the Highest min. and not the Lowest min. ;)

[Bazmundo]

Nantes caught a strong storm at 19z yesterday (22nd), shows up well on these graphs especially for temp, wind (moyen et rafales, mean and gusts) and humidity:

http://www.meteociel...2011&envoyer=OK

[fullerphotos]

Quote

Bazmundo - 23/8/2011 13:33 Nantes caught a strong storm at 19z yesterday (22nd), shows up well on these graphs especially for temp, wind (moyen et rafales, mean and gusts) and humidity: http://www.meteociel...2011&envoyer=OK

Clip here from Nantes

http://www.youtube.com/watch?v=3TGT3Z8tnWk 

 

[fullerphotos]

I should have crossed the channel yesterday. What great photos!

http://foudre.chasseurs-orages.com/viewtopic.php?t=5246

[Matt D]

Ditto! Some crackers there, nice flat chase country with big views too.

[PaulKn]

Very interesting shots, showing the fairly high-based nature of the convective, and yet still sporting a nice whales' mouth effect!

[DG57]

Here a burning night in Nice, I can't sleep ! Currently over 26°C and with a high humidex (around 36), high dew point (at 23.0°C).

This is highly contrasting with the other French Mediterranean regions, further West : currently about 15°C around the Gulf of Lion ; well this is at least more comfortable.