International Model Analyses and Forecasts

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Model Guidance

1.International Desk Forecasting Tools - Access

Operational forecasting loops developed at the WPC International Desks, to aid with the forecasting of quantitative precipitation, severe convection, surface fronts, and other impactful types of weather.

2.The Gálvez-Davison Index (GDI) - Access

Thermodynamic index developed in 2014 to improve the forecasting of different types of tropical and subtropical convection.

3.Model Analyses and Forecasts

The Caribbean and Central America
South America
The Atlantic

4.Daily wind charts for streamline analysis - Access

GFS-Model wind charts used at the International Desks on a daily basis to perform streamline analysis.

5. Quantitative Precipitation Verification Sites - Access

International Weather Service websites with daily rainfall observations and analysis for QPF verification.

Caribbean and Central America
00 UTC 06 UTC 12 UTC 18 UTC

NAM
00 NAM
December 22

-- 12 NAM
December 22 --

GFS
00 GFS
December 22

-- 12 GFS
December 22 --

GFS
Ensembles Probability of
Precipitation 00Z PQPF
December 22

12Z PQPF
December 22

Spaghetti Plots 24-Hour QPF

Observations

00 UTC 06 UTC 12 UTC 18 UTC

Sfc
West
00 Sfc
December 22

06 Sfc
December 22 12 Sfc
December 22 18 Sfc
December 21

Sfc
East
00 Sfc
December 22

06 Sfc
December 22

12 Sfc
December 22

18 Sfc
December 21

GTS Observed 24 Hr Precipitation (color)

**South America**
GTS Observed 24-hr Precipitation (color) GTS Observed 24-hr Precipitation (b/w)
	00 UTC	06 UTC	12 UTC	18 UTC
GFS	00 GFS December 22	--	12 GFS December 22	--
GFS Ensembles	00 Ensemble Means December 22	--	12 Ensemble Means December 22	--
	Probability of Precipitation		00Z PQPF December 22
	Probability of Precipitation		12Z PQPF December 22
	24-Hour QPF
CMC Ensembles	00 Ensemble Means December 22	--	12 Ensemble Means December 21	--

**Atlantic**
	00 UTC	06 UTC	12 UTC	18 UTC
GFS	00 GFS December 22	--	12 GFS December 22	--


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