diff --git a/server/scripts/modules/radar.mjs b/server/scripts/modules/radar.mjs
index 0a1d768..3dea6f0 100644
--- a/server/scripts/modules/radar.mjs
+++ b/server/scripts/modules/radar.mjs
@@ -39,9 +39,6 @@ class Radar extends WeatherDisplay {
 			{ time: 1, si: 4 },
 			{ time: 12, si: 5 },
 		];
-
-		// get some web workers started
-		this.workers = (new Array(this.dopplerRadarImageMax)).fill(null).map(() => radarWorker());
 	}
 
 	async getData(weatherParameters, refresh) {
@@ -53,6 +50,12 @@ class Radar extends WeatherDisplay {
 			return;
 		}
 
+		// get the workers started
+		if (!this.workers) {
+			// get some web workers started
+			this.workers = (new Array(this.dopplerRadarImageMax)).fill(null).map(() => radarWorker());
+		}
+
 		const baseUrl = `https://${RADAR_HOST}/archive/data/`;
 		const baseUrlEnd = '/GIS/uscomp/?F=0&P=n0r*.png';
 		const baseUrls = [];