diff --git a/predict/css/pred.css b/predict/css/pred.css
index 2973fce..3ead515 100644
--- a/predict/css/pred.css
+++ b/predict/css/pred.css
@@ -29,6 +29,19 @@ a { text-decoration: underline; color: #333; cursor: pointer; }
     display: none;
 }
 
+#error_window {
+    position: absolute;
+    left: 50%;
+    top: 50%;
+    width: 400px;
+    height: 50px;
+    margin-left: -200px;
+    margin-top: -50px;
+    padding: 1em;
+    text-align: center;
+    display: none;
+}
+
 .box {
 	position: absolute; 
 	background-color: white; 
diff --git a/predict/index.php b/predict/index.php
index c700530..5ae09d4 100644
--- a/predict/index.php
+++ b/predict/index.php
@@ -47,11 +47,13 @@ function initialize() {
         url: 'ajax.php?action=submitForm',
         type: 'POST',
         success: function(data) {
-            predSub();
             var data_split = data.split("|");
             if ( data_split[0] == 0 ) {
                 appendDebug("The server rejected the submitted form data");
+                throwError("The server rejected the submitted form data");
+                resetGUI();
             } else {
+                predSub();
                 appendDebug("The server accepted the form data");
                 // update the global current_uuid variable
                 current_uuid = data_split[1];
@@ -94,6 +96,9 @@ function initialize() {
         toggleWindow("input_form", "showHideForm", "Show Launch Card",
             "Hide Launch Card");
     });
+    $("#closeErrorWindow").click(function() {
+        $("#error_window").fadeOut();
+    });
     // plot the initial launch location
     plotClick();
     google.maps.event.addListener(map, 'mousemove', function(event) {
@@ -122,6 +127,12 @@ function initialize() {
 <a><span id="showHideDebug_status">Toggle Debug</span></a></span>
 </div>
 
+<div id="error_window" class="box">
+<span id="error_message">Nothing here!</span>
+<br /><br />
+<a id="closeErrorWindow">Close</a>
+</div>
+
 <div id="scenario_info" class="box">
 <h1>Scenario Information</h1>
 <span id="cursor_info">Current mouse position: 
diff --git a/predict/js/pred.js b/predict/js/pred.js
index 0303f28..314334d 100644
--- a/predict/js/pred.js
+++ b/predict/js/pred.js
@@ -38,6 +38,11 @@ function showMousePos(GLatLng) {
     $("#cursor_lon").html(GLatLng.lng().toFixed(4));
 }
 
+function throwError(data) {
+    $("#error_message").html(data);
+    $("#error_window").fadeIn();
+}
+
 function handlePred(pred_uuid) {
     $("#prediction_status").html("Searching for wind data...");
     $("#input_form").hide("slide", { direction: "down" }, 500);
@@ -72,6 +77,20 @@ function getJSONProgress(pred_uuid) {
     });
 }
 
+function resetGUI() {
+    $("#status_message").fadeOut(500);
+    // now clear the status window
+    $("#prediction_status").html("");
+    $("#prediction_progress").progressbar("options", "value", 0);
+    $("#prediction_percent").html("");
+    // bring the input form back up
+    toggleWindow("input_form", null, null, null, "show");
+    toggleWindow("scenario_info", null, null, null, "show");
+    // un-fade the map canvas
+    $("#map_canvas").fadeTo(1500, 1);
+}
+
+
 function processProgress(progress) {
     if ( progress['error'] ) {
         clearInterval(ajaxEventHandle);
@@ -81,20 +100,10 @@ function processProgress(progress) {
         if ( progress['gfs_complete'] == true ) {
             if ( progress['pred_complete'] == true ) { // pred has finished
                 $("#prediction_status").html("Prediction finished.");
-                $("#status_message").fadeOut(500);
-                // now clear the status window
-                $("#prediction_status").html("");
-                $("#prediction_progress").progressbar("options", "value", 0);
-                $("#prediction_percent").html("");
-                // bring the input form back up
-                $("#input_form").show("slide", { direction: "down" }, 500);
-                $("#scenario_info").show("slide", { direction: "up" }, 500);
-                toggleWindow("scenario_template", "showHideDebug", "Show Debug",
-                        "Hide Debug", "hide");
-                // un-fade the map canvas
-                $("#map_canvas").fadeTo(1500, 1);
                 appendDebug("Server says: the predictor finished running.");
                 appendDebug("Attemping to retrieve flight path from server");
+                // reset the GUI
+                resetGUI();
                 // stop polling for JSON
                 clearInterval(ajaxEventHandle);
                 // parse the data
@@ -249,8 +258,10 @@ function setFormLatLon(GLatLng) {
 function setLatLonByClick(state) {
     if ( state == true ) {
         clickListener = google.maps.event.addListener(map, 'click', function(event) {
+            $("#error_window").fadeOut();
             setFormLatLon(event.latLng);
         });
+        throwError("Now click your desired launch location on the map");
     } else if ( state == false ) {
         google.maps.event.removeListener(clickListener);
     } else {
@@ -311,11 +322,15 @@ function toggleWindow(window_name, linker, onhide, onshow, force) {
             $("#"+linker).html(onshow);
         }
     } else if ( force == "hide" ) {
-        $("#"+window_name+"").hide("slide", { direction: "down" }, 500);
-        $("#"+linker).html(onhide);
+        if( $("#"+window_name).css('display') != "none" ){
+            $("#"+window_name+"").hide("slide", { direction: "down" }, 500);
+            $("#"+linker).html(onhide);
+        }
     } else if ( force == "show") {
-        $("#"+window_name).show("slide", { direction: "down" }, 500);
-        $("#"+linker).html(onshow);
+        if( $("#"+window_name).css('display') == "none" ){
+            $("#"+window_name).show("slide", { direction: "down" }, 500);
+            $("#"+linker).html(onshow);
+        }
     } else {
         appendDebug("toggleWindow force parameter unrecognised");
     }