Instituto Portugues do Mar e Atmosfera - Homepage

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

  • Weather
    • Weather forecast
    • 10 days and hourly forecast
    • Weather Warnings
    • Vertical profile
    • Lightning
    • Online meteo stations
    • Radar observations
    • Satellite observations
    • Meteorological charts
    • World forecast
    • Report a meteorological phenomenon?
  • Seismic
    • Seismic maps
    • Shakemap
    • Moment Tensor
    • Networks
    • Bulletins
    • Projects
  • Sea
    • Beaches and ports
    • Marine forecast
    • Significant wave height
    • Sea peak period
    • Surface current
    • Sea surface temperature
    • Sea surface height
  • Climate
    • Climate Monitoring
    • Climate Extremes
    • Climate Normals
    • Drought
    • Climate Services
    • Climate web portal
  • Bivalves
    • Bivalves - Biotoxins
    • Legislation and Documents
    • Production areas
    • Biotoxins
    • Phytoplankton
    • Contaminants Metals
    • Microbiology
    • Resources
    • Bivalves - historical
  • Fisheries
    • Disclosure
    • Projects
    • Fish management
  • Aeronautic
    • TAF and METAR
    • Selfbrienfing
    • Know more
  • Agriculture
    • Evapotranspiration [ET0]
    • Daily data
    • Monthly data
    • Fruits data
    • Viticulture data
    • More information
  • Environment
    • Fire Risk Index Mainland
    • FWI Madeira
    • Ultra-violet index
    • Greenhouse gases
  • Vessels
    • Mar Portugal
    • Noruega
    • Diplodus
    • Tellina
    • Puntazzo
  • Space
    • MSG satellite

News

  • firestorm

    fireIPMA involved in extreme fire behavior project
    2019-02-13
  • aristotle

    fireIPMA leads fire area in European project
    2019-02-13

    METEOALARM - Lisboa 2018

    Warning Map in MeteoalarmMETEOALARM Meeting in Lisbon - 3 and 4 May 2018
    2018-05-08

    Snow in Lisbon?

    snow flakeSnow in Lisbon? What happened on the afternoon April 10, 2018?
    2018-04-13
  • See all news
IPMA>

Criteria for the Issuance of Weather Warnings

User’s Guide | Criteria for the Issuance

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  
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
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)
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  
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  
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
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
  • Print
  •  | 
  • Top
 
 
  • Media

    • News
    • Comunication
    • Lectures / workshops
  • Social network

    • Facebook
    • Facebook - Azores
    • Twitter
    • YouTube
    • Instagram
  • Services

    • RSS
    • Apps Android
    • Apps Apple
    • PDA
    • Products and services
  • Information

    • Contacts
    • Useful links
    • Research scholarship
    • EEAGrants projects
    • ECMWF
  • About site

    • Accessibility
    • Legal warnings
    • Site Map
  • Web projects

    • Meteoglobal
    • Subscriptions
    • Survey
    • E-learning
    • Shakemap
 
  • Apcer - A marca da Certificação
  • Lisboa:
        UTC:

    Copyright © Copyright © Instituto Português do Mar e da Atmosfera 2012 2019
  • Ministério do Mar