FPCN15 CWWG 121047 FORECASTS FOR SOUTHERN ALBERTA AND THE MOUNTAIN PARKS ISSUED BY ENVIRONMENT CANADA AT 5:00 A.M. MDT MONDAY 12 MAY 2025 FOR TODAY AND TUESDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. MDT. --------------------------------------------------------------------- MAJOR REFERENCE ELEVATIONS: BANFF: 1384 METRES. LAKE LOUISE: 1750 METRES. HIGHWAY 93 - BOW SUMMIT: 2068 METRES. HIGHWAY 93 - SUNWAPTA PASS: 2034 METRES. COLUMBIA ICEFIELDS VISITORS CENTRE: 2006 METRES. JASPER: 1061 METRES. CANMORE: 1350 METRES. HWY 40 - HIGHWOOD PASS: 2206 METRES. PINCHER CREEK: 1030 METRES. WATERTON: 1280 METRES. CROWSNEST PASS: 1300 METRES. --------------------------------------------------------------------- CITY OF CALGARY. TODAY..RAIN. RISK OF A THUNDERSTORM THIS AFTERNOON. AMOUNT 10 TO 15 MM. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 THIS AFTERNOON. HIGH 12. UV INDEX 1 OR LOW. TONIGHT..PERIODS OF RAIN ENDING BEFORE MORNING THEN CLOUDY. RISK OF A THUNDERSTORM EARLY THIS EVENING. AMOUNT 5 TO 10 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 5. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 18. UV INDEX 6 OR HIGH. OKOTOKS - HIGH RIVER - CLARESHOLM. TODAY..RAIN. RISK OF A THUNDERSTORM THIS AFTERNOON. AMOUNT 5 TO 10 MM. HIGH 12. UV INDEX 1 OR LOW. TONIGHT..RAIN. RISK OF A THUNDERSTORM EARLY THIS EVENING. AMOUNT 5 TO 10 MM. LOW PLUS 5. TUESDAY..RAIN ENDING IN THE MORNING THEN MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 16. UV INDEX 5 OR MODERATE. AIRDRIE - COCHRANE - OLDS - SUNDRE. TODAY..RAIN AT TIMES HEAVY. AMOUNT 20 TO 30 MM. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 THIS AFTERNOON. HIGH 10. UV INDEX 1 OR LOW. TONIGHT..RAIN AT TIMES HEAVY ENDING BEFORE MORNING THEN CLOUDY. AMOUNT 10 TO 20 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 5. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 17. UV INDEX 6 OR HIGH. DRUMHELLER - THREE HILLS. TODAY..RAIN. RISK OF A THUNDERSTORM THIS AFTERNOON. AMOUNT 10 TO 15 MM. HIGH 14. UV INDEX 1 OR LOW. TONIGHT..PERIODS OF RAIN ENDING OVERNIGHT THEN CLOUDY. RISK OF A THUNDERSTORM THIS EVENING. AMOUNT 5 TO 10 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR MIDNIGHT. LOW 6. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 18. UV INDEX 6 OR HIGH. BROOKS - STRATHMORE - VULCAN. TODAY..RAIN. RISK OF A THUNDERSTORM THIS AFTERNOON. AMOUNT 5 TO 10 MM. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 THIS AFTERNOON. HIGH 17. UV INDEX 2 OR LOW. TONIGHT..SHOWERS ENDING LATE THIS EVENING THEN PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT 5 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR MIDNIGHT. LOW 6. TUESDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 18. UV INDEX 6 OR HIGH. KANANASKIS - CANMORE. TODAY..RAIN AT TIMES HEAVY EXCEPT SNOW AT TIMES HEAVY OVER HIGHER TERRAIN. RAINFALL AMOUNT 20 TO 30 MM EXCEPT SNOWFALL AMOUNT 5 CM OVER HIGHER TERRAIN. SNOW LEVEL LOWERING TO 2000 METRES THIS MORNING. HIGH 10. UV INDEX 1 OR LOW. TONIGHT..RAIN AT TIMES HEAVY EXCEPT SNOW OVER HIGHER TERRAIN. RAINFALL AMOUNT 10 TO 20 MM EXCEPT SNOWFALL AMOUNT 10 CM OVER HIGHER TERRAIN. SNOW LEVEL 2000 METRES LOWERING TO 1600 METRES NEAR MIDNIGHT. LOW PLUS 2. TUESDAY..RAIN ENDING IN THE MORNING THEN MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. SNOW OVER HIGHER TERRAIN EARLY IN THE MORNING. SNOWFALL AMOUNT 2 CM OVER HIGHER TERRAIN. SNOW LEVEL 1600 METRES RISING TO 2500 METRES IN THE AFTERNOON. HIGH 15. UV INDEX 5 OR MODERATE. BANFF NATIONAL PARK HIGHWAY 93 - LAKE LOUISE TO SASKATCHEWAN RIVER CROSSING. TODAY..RAIN. RAINFALL AMOUNT 10 TO 20 MM EXCEPT SNOWFALL AMOUNT 10 CM OVER SECTIONS OF THE ICEFIELDS PARKWAY. SNOW LEVEL LOWERING TO 1700 METRES THIS MORNING. HIGH 9. UV INDEX 1 OR LOW. TONIGHT..RAIN CHANGING TO SNOW MIXED WITH RAIN THIS EVENING. SNOWFALL AMOUNT 5 TO 10 CM. SNOW LEVEL 1700 METRES LOWERING TO VALLEY BOTTOM THIS EVENING. LOW PLUS 4. TUESDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 14. UV INDEX 5 OR MODERATE. HIGHWAY 93 - JASPER TO SASKATCHEWAN RIVER CROSSING JASPER NATIONAL PARK. TODAY..RAIN. RAINFALL AMOUNT 10 TO 20 MM EXCEPT SNOWFALL AMOUNT 10 CM OVER SECTIONS OF THE ICEFIELDS PARKWAY. SNOW LEVEL 2000 METRES LOWERING TO 1500 METRES THIS MORNING. HIGH 10. UV INDEX 1 OR LOW. TONIGHT..RAIN ENDING NEAR MIDNIGHT THEN CLOUDY. RAINFALL AMOUNT 5 TO 10 MM EXCEPT SNOWFALL AMOUNT 5 CM OVER SECTIONS OF THE ICEFIELDS PARKWAY. SNOW LEVEL 1700 METRES. LOW PLUS 4. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 17. UV INDEX 6 OR HIGH. NORDEGG - FORESTRY TRUNK ROAD HIGHWAY 734. TODAY..RAIN AT TIMES HEAVY EXCEPT SNOW OVER HIGHER TERRAIN. RAINFALL AMOUNT 30 TO 40 MM EXCEPT SNOWFALL AMOUNT 5 CM OVER HIGHER TERRAIN. HIGH 6. UV INDEX 1 OR LOW. TONIGHT..RAIN AT TIMES HEAVY ENDING BEFORE MORNING THEN CLOUDY. SNOW OVER HIGHER TERRAIN. RAINFALL AMOUNT 10 TO 15 MM EXCEPT SNOWFALL AMOUNT 5 CM OVER HIGHER TERRAIN. LOW PLUS 2. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 16. UV INDEX 6 OR HIGH. ROCKY MOUNTAIN HOUSE - CAROLINE. TODAY..RAIN AT TIMES HEAVY. AMOUNT 20 TO 30 MM. TEMPERATURE STEADY NEAR 7. UV INDEX 1 OR LOW. TONIGHT..RAIN AT TIMES HEAVY ENDING BEFORE MORNING THEN CLOUDY. AMOUNT 10 TO 20 MM. LOW PLUS 4. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 17. UV INDEX 6 OR HIGH. RED DEER - PONOKA - INNISFAIL - STETTLER. TODAY..CLOUDY. RAIN AT TIMES HEAVY BEGINNING EARLY THIS MORNING. AMOUNT 20 TO 30 MM EXCEPT 10 MM EAST OF THE QE2 HIGHWAY. WIND BECOMING NORTHEAST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. TEMPERATURE STEADY NEAR 9. UV INDEX 1 OR LOW. TONIGHT..RAIN ENDING BEFORE MORNING THEN CLOUDY. AMOUNT 10 TO 20 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 5. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 17. UV INDEX 6 OR HIGH. HANNA - CORONATION - OYEN. TODAY..RAIN ENDING THIS AFTERNOON THEN CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM LATE THIS AFTERNOON. AMOUNT 10 TO 15 MM. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 THIS AFTERNOON. TEMPERATURE STEADY NEAR 11. UV INDEX 1 OR LOW. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING AND AFTER MIDNIGHT. RISK OF A THUNDERSTORM EARLY THIS EVENING. WIND NORTHWEST 30 KM/H GUSTING TO 50. LOW 6. TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 IN THE AFTERNOON. HIGH 17. UV INDEX 6 OR HIGH. MEDICINE HAT - BOW ISLAND - SUFFIELD. TODAY..SHOWERS ENDING THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. LOCAL AMOUNT 5 TO 10 MM. WIND BECOMING WEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON THEN INCREASING TO 40 GUSTING TO 60. HIGH 21. UV INDEX 6 OR HIGH. TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS EVENING WITH RISK OF A THUNDERSTORM. WIND WEST 40 KM/H GUSTING TO 60 BECOMING NORTHWEST 20 GUSTING TO 40 THIS EVENING THEN LIGHT OVERNIGHT. LOW 7. TUESDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. WIND BECOMING NORTH 20 KM/H GUSTING TO 40 IN THE AFTERNOON. HIGH 18. UV INDEX 6 OR HIGH. CYPRESS HILLS PROVINCIAL PARK - FOREMOST. TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM LATE THIS AFTERNOON. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 THIS MORNING THEN WEST 40 GUSTING TO 60 THIS AFTERNOON. HIGH 22. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. WIND WEST 40 KM/H GUSTING TO 60 BECOMING NORTHWEST 20 GUSTING TO 40 THIS EVENING. LOW 6. TUESDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH 16. UV INDEX 6 OR HIGH. LETHBRIDGE - TABER - MILK RIVER. TODAY..SHOWERS ENDING THIS AFTERNOON THEN CLOUDY. RISK OF A THUNDERSTORM THIS MORNING AND EARLY THIS AFTERNOON. LOCAL AMOUNT 5 TO 10 MM. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING SOUTHWEST 20 GUSTING TO 40 LATE THIS MORNING THEN WEST 40 GUSTING TO 60 THIS AFTERNOON. HIGH 17. UV INDEX 2 OR LOW. TONIGHT..PARTLY CLOUDY. WIND WEST 40 KM/H GUSTING TO 60 DIMINISHING TO 20 GUSTING TO 40 THIS EVENING THEN BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 4. TUESDAY..CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 13. UV INDEX 4 OR MODERATE. CARDSTON - FORT MACLEOD - MAGRATH. TODAY..SHOWERS ENDING NEAR NOON THEN CLOUDY. RISK OF A THUNDERSTORM THIS MORNING. WIND NORTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS MORNING. WIND BECOMING WEST 20 GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 16. UV INDEX 4 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW PLUS 4. TUESDAY..RAIN. RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 13. UV INDEX 2 OR LOW. CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK. TODAY..SHOWERS ENDING THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING AND EARLY THIS AFTERNOON. WIND BECOMING WEST 30 KM/H GUSTING TO 50 EARLY THIS AFTERNOON. HIGH 15. UV INDEX 5 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND WEST 30 KM/H GUSTING TO 50 BECOMING LIGHT THIS EVENING. LOW PLUS 3. TUESDAY..RAIN. RISK OF A THUNDERSTORM IN THE AFTERNOON. SNOWFALL AMOUNT 2 CM OVER HIGHER TERRAIN. SNOW LEVEL 1600 METRES RISING TO 2200 METRES IN THE MORNING. HIGH 13. UV INDEX 2 OR LOW. END