Weather for the Mariner

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Buys Ballot Law• Its important to know where the lowpressure center is located.• This is thumb rule to use to locate the lowpressure system relative to your location.• Stand with the wind at your back• Turn 15 deg to your right• Low pressure will be to your left and high pressurewill be to your right• In other words the storm center is to your left andclear weather to your right
Air Masses and Frontal Systems• When two different airmasses collide, theboundary of the collisionis called a front.• Four types of fronts:– Cold front– Warm front– Stationary front– Occluded front
Page 1: Weather for the MarinerCDR Donna Se
Page 4 and 5: Decisions Affected by Weather:Crew
Page 6 and 7: Decisions Affected by Weather:Navig
Page 8 and 9: Weather Tools Available On• Barom
Page 10 and 11: Weather Tools Onboard Navy 44• Ch
Page 12 and 13: Typical chart receivedonboard a Nav
Page 15 and 16: Nautical Weather Sayings• Red sky
Page 17 and 18: Marine Weather Thumb Rules• Pay a
Page 19 and 20: Marine Weather Thumb Rules• Low a
Page 21 and 22: Marine Weather Thumb Rules• Chang
Page 23 and 24: Air Masses• Air masses are vast b
Page 25 and 26: Can you pick out the5 types of air
Page 27 and 28: Pressure• The Earth is alwaysthro
Page 29 and 30: High Pressure• Air circulates aro
Page 31 and 32: Pressure• Atmospheric pressure is
Page 33 and 34: Pressure and P`essure Trends• Wat
Page 35 and 36: Wind and Pressure• Wind is the re
Page 37 and 38: Wind and Pressure• Weather charts
Page 39: The red arrow indicates your boat
Page 43 and 44: Cold Front• Cold Air pushes under
Page 45 and 46: Cold Front Weather Sequence• Wind
Page 47 and 48: Cold Front Weather Sequence• As f
Page 49 and 50: Microburst Sequence
Page 51 and 52: Warm Front Weather• Cirrus clouds
Page 53 and 54: Nimbostratus (Ns)Altostratus (As)Ci
Page 55: Occluded Front• Occurs when cold
Page 58 and 59: Typical chart receivedonboard a Nav
Page 60 and 61: Nautical Weather Sayings• Red sky
Page 62 and 63: Forecasting weather usingclouds•
Page 64 and 65: CloudsAltocumulus Ac(mackerel skies
Page 66 and 67: Cloudscumulus Cu (heap)
Page 68 and 69: CloudsCumulonimbus Cb
Page 70 and 71: CloudsCumulonimbus with waterspout
Page 72 and 73: Red Sky at NightSailor’s Delight
Page 74 and 75: “Mackerel Skies and Mare’s Tail
Page 76 and 77: USN Official Use Only ResourcesNava
Page 78 and 79: Location of NOAA Buoys
Page 80 and 81: Location of NOAA Buoys
Page 82: Location of NOAA Buoys
Page 86 and 87: SSB or HF Radio• Voice Broadcasts
Page 88 and 89: Wind WarningsGale Warnings: 34 - 47
Page 90 and 91:
Hurricane Warnings• Definite Clos
Page 92 and 93:
Hurricanes and Tropical Storms• A
Page 94 and 95:
Onboard Weather ChartsHF Facsimile
Page 96 and 97:
Weather Charts• Weather Charts ca
Page 98 and 99:
Weather Chart Symbols
Page 100 and 101:
Weather Charts and Symbols• Surfa
Page 102 and 103:
Deciphering Wind Barbs• Wind barb
Page 104 and 105:
Deciphering Wind BarbsWhat is the d
Page 106:
Weather Chart Symbols
Page 109:
Surface Forecast Charts for 24 hr 4
Page 112 and 113:
Remember what the bold 564 isoheigh
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Upper Level Weather Charts• Upper
Page 116 and 117:
5640 isoheight (bold line) shows th
Page 118:
Why is Sea State Important?• Beca
Page 123 and 124:
Remember what the bold 564 isoheigh
Page 125:
Questions???
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Weather for the Mariner

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