Tuesday, July 26, 2011

The Black Sea Breeze - as a trigger

Visible channel (sat24.com) from EUMETSAT. The sea breeze acts like a lifting mechanism for convection initiation in Dobrudja. The general circulation in SE Romania is from South, and will produce propagation toward the South, and there is a strong low level flux of moisture from the sea to Moldova. Severe weather is expected in the Eastern half of Romania, several supercells.

Later: a supercell splits: on satellite (two red circles), and radar (zoom on the SE part of Romania). Is nice to observe the huge dimensions of the anvil.

Monday, July 25, 2011

A Mesovortex Over South of Romania

High Resolution Visible. EUMETSAT, NMA
6 UTC formed over the precipitation pool last night.
Radar mosaic first tilt, under Google application, NMA.

Saturday, July 23, 2011

A Bow Echo

An early morning bow echo approaching the Bucharest area. Seen on Radar (with a zoom around Bucharest). visible sat chanel (from sat24.com) and RGB-airmass product (EUMETSAT,NMA).
The dry air behind the system (west of Bucharest), is the trigger of the bow, but the rear inflow jet is high, so instead of wind, a rain-pool can form with a flash-flood.
Heavy rain is expected.

Thursday, July 21, 2011

An Innocent Outflow

The arrow points a small convective cell that produces a significant outflow 30 minutes later. The cell doesn't contain rain, so the radar (OWT national mosaic) doesn't get it. This is an example on how subtle mesoscale features and sources of weather changes can be. 

Wednesday, July 20, 2011

Undular Bores on radar and satellite

Undular Bores leaving a strong convective system.
Easier to see on visible satellite because they are too shallow for the radar horizont.
We expect severe weather today in the Western and Southwestern Romania, heavy rainfall, wind gusts.