THUNDERSTORMS CHECKLIST

Fundamental parameters for thunderstorms formation

Item	Parameter	Yes	No
1	MUCAPE>0 J/kg
2	LAPSE RATES 800-600 hPa (K/km)>6
4	Specific umidity at 950 hPa > x
5	CIN < 100 J/kg Click here to evaluate CIN reduction mechanisms

Forcings for ascent and thunderstorm initiation

Item	Parameter	Yes	No
1	SYNOPTIC SCALE: Frontal \| Trough passage
2	SYNOPTIC SCALE: PV anomaly
3	SYNOPTIC SCALE: Jet streaks : Left Exit \| Right Entrance
4	MESOSCALE: Thermal boundary: gradient on theta@950 + wind convergence line
5	LOCAL SCALE: Flow over orography
6	LOCAL SCALE: Breeze boundaries

NWP Interpretation

Item	Parameter	Yes	No
1	Probability of convective precipitations >10% (TP3 > 40mm/3h)?

What will be the prevailing storm mode?

Item	Parameter	WEAK	MODERATE or STRONG in the lower levels	STRONG and DEEP
1	Deep layer shear
		SHORT and MESSY	LONG and STRAIGHT	LONG and CURVED
2	Hodograph shape

Ordinary cells

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Multicells

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Supercells

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Nowcasting

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