Functions for general alerts and Defiance-specific alerts

weather/alerts_filter.js

@@ -23,11 +23,11 @@ let tstp = alerts.filter(function(alert) {
     }
 })
 
-// Filter for Flash Flood Warnings
+// Filter for Tornado Warnings
 
-let flash_flood = alerts.filter(function(alert) {
+let tornado = alerts.filter(function(alert) {
     if (alert.raw.properties &&
-    alert.raw.properties.event === "Flash Flood Warning") {
+    alert.raw.properties.event === "Tornado Warning") {
         return true
     }
 })
@@ -40,7 +40,7 @@ msg.ts_count = ts.length
 msg.tstp = tstp
 msg.tstp_count = tstp.length
 
-msg.flash_flood = flash_flood
+msg.tornado = tornado
-msg.flash_flood_count = flash_flood.length
+msg.tornado_count = tornado.length
 
 return msg

weather/defiance.js

@@ -0,0 +1,46 @@
+let alerts = msg.payload.features
+
+// Filter for Severe Thunderstorm Warnings
+
+let ts = alerts.filter(function(alert) {
+    if (alert.properties &&
+    alert.properties.event === "Severe Thunderstorm Warning") {
+        return true
+    }
+})
+
+// Filter for Severe Thunderstorm Warnings with tornado detection
+// that have a tornado possible parameter
+
+let tstp = alerts.filter(function(alert) {
+    if (alert.properties &&
+    alert.properties.event === "Severe Thunderstorm Warning" &&
+    alert.properties.parameters &&
+    alert.properties.parameters.tornadoDetection &&
+    alert.properties.parameters.tornadoDetection.length > 0) {
+        let tornadoPossible = alert.properties.parameters.tornadoDetection[0]
+        return tornadoPossible === "POSSIBLE"
+    }
+})
+
+// Filter for Tornado Warnings
+
+let tornado = alerts.filter(function(alert) {
+    if (alert.properties &&
+    alert.properties.event === "Tornado Warning") {
+        return true
+    }
+})
+
+// If there are any alerts, return them
+
+msg.ts = ts
+msg.ts_count = ts.length
+
+msg.tstp = tstp
+msg.tstp_count = tstp.length
+
+msg.tornado = tornado
+msg.tornado_count = tornado.length
+
+return msg