Mesoscale Discussion
Valid: Mon 09 Jun 2014 10:00 to Tue 10 Jun 2014 15:00 UTC
Issued: Mon 09 Jun 2014 09:48
Forecaster: PUCIK
Abundant DMC activity is already ongoing in the morning hours. Most of this activity is likely elevated with risk for large hail in the environment of steep lapse rates. The first cluster is now situated over Belgium moving towards Netherlands. Second one is located over NW France with similar movement direction. As daytime heating continues ahead of these clusters with easterly to southeasterly moist surface flow (dewpoints between 18 and 20 °C), this activity may eventually become surface-based, especially at the eastern flank of the systems. That would rapidly increase chances for supercellular convection capable of very large hail and damaging wind gusts.
To the east and south of the ongoing convective systems, diurnal heating along with backing low-level flow is observed. Further backing of the low-level flow is forecast as surface pressure falls over Southern France. Current thinking is that despite this early activity, best conditions will still develop by the late afternoon with high CAPE values and strong DLS.
Valid: Mon 09 Jun 2014 10:00 to Tue 10 Jun 2014 15:00 UTC
Issued: Mon 09 Jun 2014 09:48
Forecaster: PUCIK
Abundant DMC activity is already ongoing in the morning hours. Most of this activity is likely elevated with risk for large hail in the environment of steep lapse rates. The first cluster is now situated over Belgium moving towards Netherlands. Second one is located over NW France with similar movement direction. As daytime heating continues ahead of these clusters with easterly to southeasterly moist surface flow (dewpoints between 18 and 20 °C), this activity may eventually become surface-based, especially at the eastern flank of the systems. That would rapidly increase chances for supercellular convection capable of very large hail and damaging wind gusts.
To the east and south of the ongoing convective systems, diurnal heating along with backing low-level flow is observed. Further backing of the low-level flow is forecast as surface pressure falls over Southern France. Current thinking is that despite this early activity, best conditions will still develop by the late afternoon with high CAPE values and strong DLS.
