How is this a Winter Storm Watch if it's Spring?

Our weather forecast for the next few days goes a little something like this:



...WINTER STORM WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON. RAIN AND SNOW SHOWERS WILL TURN TO ALL SNOW LATE WEDNESDAY NIGHT WITH THE HEAVIEST SNOW EXPECTED THURSDAY MORNING. THE HEAVIER SNOW WILL THEN SHIFT OUT EASTWARD OVER THE PLAINS THURSDAY AFTERNOON. SNOW ACCUMULATIONS OF 3 TO 8 INCHES IS POSSIBLE BY THURSDAY EVENING. UP TO 12 INCHES IS POSSIBLE IN THE FRONT RANGE FOOTHILLS. REMEMBER...A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR A HAZARDOUS WINTER WEATHER EVENT IN AND CLOSE TO THE WATCH AREA. SIGNIFICANT SNOW ACCUMULATIONS MAY OCCUR THAT COULD IMPACT TRAVEL. STAY TUNED TO THE NATIONAL WEATHER SERVICE OR YOUR LOCAL NEWS MEDIA FOR THE LATEST UPDATES AND POSSIBLE WARNING CONCERNING THIS POTENTIAL WINTER STORM.
Quote:
URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 306 PM MDT TUE APR 8 2008 ...POTENTIAL SPRING STORM HEADING TOWARDS COLORADO... .A STORM SYSTEM DEVELOPING OVER THE GREAT BASIN WILL MOVE ACROSS SOUTHERN COLORADO ON THURSDAY BEFORE INTENSIFYING ACROSS THE CENTRAL PLAINS THURSDAY EVENING. SNOW WILL BECOME WIDESPREAD IN THE MOUNTAINS WEDNESDAY EVENING AND CONTINUE ON THURSDAY. RAIN AND SNOW SHOWERS WILL BECOME ALL SNOW LATE WEDNESDAY NIGHT AND CONTINUE ON THURSDAY ACROSS LOWER ELEVATIONS. THERE IS STILL CONCERN OVER THE EXACT TRACK OF THE STORM...AS ANY DEVIATION WILL RESULT IN WIDE VARIED SNOW AMOUNTS ACROSS THE MOUNTAINS AND PLAINS. THE INITIAL WARM TEMPERATURES WILL ALSO KEEP THE MAJORITY OF THE SNOW ON GRASSY SURFACES. HOWEVER...INTENSE...SHORT LIVED PERIODS OF SNOW IS LIKELY TO IMPACT TRAVELERS ACROSS THE REGION.