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Added parsing for Recent Significant Weather e.g. REUP #16

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Apr 10, 2015
Merged

Added parsing for Recent Significant Weather e.g. REUP #16

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42 changes: 39 additions & 3 deletions metar.js
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,32 @@ var WEATHER = {
FC: "funnel cloud"
};

var RECENT_WEATHER = {
REBLSN: "Moderate/heavy blowing snow (visibility significantly reduced)reduced",
REDS: "Dust Storm",
REFC: "Funnel Cloud",
REFZDZ: "Freezing Drizzle",
REFZRA: "Freezing Rain",
REGP: "Moderate/heavy snow pellets",
REGR: "Moderate/heavy hail",
REGS: "Moderate/heavy small hail",
REIC: "Moderate/heavy ice crystals",
REPL: "Moderate/heavy ice pellets",
RERA: "Moderate/heavy rain",
RESG: "Moderate/heavy snow grains",
RESHGR: "Moderate/heavy hail showers",
RESHGS: "Moderate/heavy small hail showers",
RESHGS: "Moderate/heavy snow pellet showers",
RESHPL: "Moderate/heavy ice pellet showers",
RESHRA: "Moderate/heavy rain showers",
RESHSN: "Moderate/heavy snow showers",
RESN: "Moderate/heavy snow",
RESS: "Sandstorm",
RETS: "Thunderstorm",
REUP: "Unidentified precipitation (AUTO obs. only)",
REVA: "Volcanic Ash"
};

function parseAbbreviation(s, map) {
var abbreviation, meaning, length = 3;
if (!s) return;
Expand Down Expand Up @@ -180,7 +206,7 @@ METAR.prototype.parseWind = function() {
this.result.wind.speed = asInt(this.current.slice(3,5));

var unitMatch;
if (unitMatch = this.current.match(/KT|MPS|KPH$/)) {
if (unitMatch = this.current.match(/KT|MPS|KPH|SM$/)) {
this.result.wind.unit = unitMatch[0];
}
else {
Expand Down Expand Up @@ -292,6 +318,17 @@ METAR.prototype.parseAltimeter = function() {
}
};

METAR.prototype.parseRecentSignificantWeather = function() {
this.next();

if (this.current === undefined || this.current === null) return;

if (RECENT_WEATHER[this.current]) {
this.result.recentSignificantWeather = this.current;
this.result.recentSignificantWeatherDescription = RECENT_WEATHER[this.current];
}
};

METAR.prototype.parse = function() {
this.parseType();
this.parseStation();
Expand All @@ -306,10 +343,9 @@ METAR.prototype.parse = function() {
this.parseClouds();
this.parseTempDewpoint();
this.parseAltimeter();
this.parseRecentSignificantWeather();
};



function parseMETAR(metarString) {
var m = new METAR(metarString);
m.parse();
Expand Down
26 changes: 23 additions & 3 deletions test/parse_metar_test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,9 @@ describe("METAR parser", function() {

m = parseMetar("PAOM 302353Z COR 32005KT 10SM CLR M03/M09 A2993");
assert.equal(true, m.correction);

m = parseMetar("KCNO 302353Z COR 25013KT 10SM FEW180 23/14 A2994 RMK AO2 SLP133 T02330139 10306 20217 55002");
assert.equal(true, m.correction);
});

it("can parse metar without auto", function() {
Expand Down Expand Up @@ -80,7 +83,7 @@ describe("METAR parser", function() {
assert.equal(42, m.wind.gust);
});

it("can MPH speed", function() {
it("can parse MPH speed", function() {
var m = parseMetar("ULLI 172030Z 23004MPS 9999 -SHRA SCT022CB BKN043 OVC066 13/10 Q1010 NOSIG");
assert.equal(4, m.wind.speed);
assert.equal("MPS", m.wind.unit);
Expand Down Expand Up @@ -231,7 +234,6 @@ describe("METAR parser", function() {
cumulonimbus: true
}], m.clouds);
});

});

describe("for temp/dewpoint", function() {
Expand All @@ -252,7 +254,6 @@ describe("METAR parser", function() {
assert.equal(-2, m.temperature);
assert.equal(-3, m.dewpoint);
});

});

describe("for altimeter", function() {
Expand All @@ -265,7 +266,26 @@ describe("METAR parser", function() {
var m = parseMetar("KLZZ 302355Z AUTO 00000KT 10SM CLR 04/M02 A3029 RMK AO2 T00391018 10070 20031");
assert.equal(30.29, m.altimeter_in_hg);
});
});

describe("for recent significant weather", function() {
it("can parse Moderate/heavy rain showers [RESHRA]", function() {
var m = parseMetar("EFKI 171950Z 00000KT 9999 MIFG FEW012 SCT200 10/11 Q1006 RESHRA");
assert.equal("RESHRA", m.recentSignificantWeather);
assert.equal("Moderate/heavy rain showers", m.recentSignificantWeatherDescription);
});

it("can parse Auto recent weather Unidentified precipitation", function() {
var m = parseMetar("EFKI 171950Z 00000KT 9999 MIFG FEW012 SCT200 10/11 Q1006 REUP");
assert.equal("REUP", m.recentSignificantWeather);
assert.equal("Unidentified precipitation (AUTO obs. only)", m.recentSignificantWeatherDescription);
});

it("can parse obs without recent weather", function() {
var m = parseMetar("EFKI 171950Z 00000KT 9999 MIFG FEW012 SCT200 10/11 Q1006=");
assert.equal(null, m.recentSignificantWeather);
assert.equal(null, m.recentSignificantWeatherDescription);
});
});

describe("for rvr", function() {
Expand Down