IPMA - Índice

Who we are  |
Where we are  |
Scientific Council  |
Projects  |
eLibrary  |
ipma enciclopedia   |
Contacts  |
Portuguese

IPMA>

Criteria for Mainland and Madeira Islands
Warning	Parameter	Yellow	Orange	Red	Units	Notes
Wind	Maximum Gust	70 to 90	91 to 130	> 130	km/h
Wind	Maximum Gust	90 to 110	111 to 130	> 130	km/h	In the highlands
Rainfall	Rain/Showers	10 to 20	21 to 40	> 40	mm/1h	Milimeters in 1 hour
Rainfall	Rain/Showers	30 to 40	41 to 60	> 60	mm/6h	Milimeters in 6 hour
Neve	Queda de Neve	5 to 10	11 to 100	> 100	cm	Level (altitude >1000 m)
Neve	Queda de Neve	1 to 5	6 to 30	> 30	cm	Level (altitude <1000 m)
Thunderstorm	Electric Discharges	a)	b)	c)		a) Frequent and scattered. b) Frequent and close together. c) Very frequent and excessively close together.
Fog	Visibility	*≥ 48h	*≥ 72h	*≥ 96h		* - duration
High Temperature	Maximum Temperature	# to # *	# to # *	> # *	ºC	* - duration ≥ 48 horas
Low Temperature	Minimum Temperature	# to # *	# to # *	< # *	ºC	* - duration ≥ 48 horas
Coastal Event	Significant Wave Height	4 to 5	5 to 7	> 7	m
Coastal Event	Significant Wave Height	2 to 3	3 to 5	> 5	m	With swell from Southwest off the southern Algarve coast

# - Values for each Region in the next table.

	Minimum Temperature			Maximum Temperature
Distrito	Yellow	Orange	Red	Yellow	Orange	Red
Viana do Castelo	-1 to -3	-4 to -5	< -5	32 to 36	37 to 38	> 38
Braga	-1 to -3	-4 to -5	< -5	34 to 36	37 to 38	> 38
Porto	1 to -1	-2 to -3	< -3	32 to 36	37 to 38	> 38
Vila Real	-2 to -3	-4 to -5	< -5	34 to 37	38 to 39	> 39
Bragança	-4 to -7	-8 to -10	< -10	34 to 36	37 to 38	> 38
Viseu	-2 to -4	-5 to -7	< -7	35 to 38	39 to 40	> 40
Guarda	-3 to -6	-7 to -10	< -10	31 to 33	34 to 36	> 36
Castelo Branco	0 to -2	-3 to -4	< -4	37 to 39	40 to 41	> 41
Aveiro	3 to 1	0 to -1	< -1	31 to 35	36 to 38	> 38
Coimbra	-1 to -3	-4 to -5	< -5	35 to 38	39 to 40	> 40
Leiria	-1 to -3	-4 to -6	< -6	31 to 35	36 to 40	> 40
Lisboa	3 to 1	0 to -1	< -1	34 to 37	38 to 40	> 40
Setúbal	1 to -2	-3 to -4	< -4	35 to 39	40 to 42	> 42
Santarém	1 to -1	-2 to -3	< -3	38 to 41	42 to 43	> 43
Portalegre	1 to -1	-2 to -5	< -5	36 to 39	40 to 41	> 41
Évora	1 to -1	-2 to -4	< -4	37 to 40	41 to 43	> 43
Beja	1 a -1	-2 to -4	< -4	37 to 40	41 to 43	> 43
Faro	4 to 1	0 to -1	< -1	33 to 37	38 to 41	> 41
Funchal	4 to 2	1 to 0	< 0	28 to 34	35 to 38	> 38

Criteria for Azores Islands
Warning	Parameter	Yellow	Orange	Red	Units	Notes
Wind	Mean Wind Speed	65 - 74	75 - 87	> 87	km/h
Wind	Maximum Gust	85 to 100	101 to 130	> 130	km/h
Rainfall	Rain/Showers	10 to 20	21 to 40	> 40	mm/1h	Millimeters in 1 hour
Rainfall	Rain/Showers	25 to 40	41 to 60	> 60	mm/6h	Millimeters in 6 hour
Snow	Queda de Neve	0 to 1	2 to 5	> 5	cm	Duration ≥ 48 hours and e leve (altitude >900 m)
Thunderstorm	Electric Discharges	a)	b)	c)		a) Frequent and scattered. b) Frequent and close together. c) Very frequent and excessively close together.
Fog	Visibility	*≥ 48h	*≥ 72h	*≥ 96h		* - duration
High Temperature	Maximum Temperature	# to # *	# to # *	> # *	ºC	* - duration ≥ 48 horas
Low Temperature	Minimum Temperature	# to # *	# to # *	< # *	ºC	* - duration ≥ 48 horas
Coastal Event	Significant Wave Height	6 to 7	7 to 9	> 9	m

# - Values for each Group in the next table..

	Minimum Temperature			Maximum Temperature
Group	Yellow	Orange	Red	Yellow	Orange	Red
Oriental	8 to 5	4 to 0	< 0	28 to 29	30 to 31	> 31
Central	8 to 5	4 to 0	< 0	28 to 29	30 to 31	> 31
Occidental	8 to 5	4 to 0	< 0	28 to 29	30 to 31	> 31