MONTHLY WEATHER DATA AND OBS - WESTMONT 1.1W PA APRIL 2009 OBSERVER NATE MULLINS Special Observations: F=fog, T=thunder, H=hail, S=sleet, G=glaze, DW=damaging winds Observation time for this station is midnight. Temperature, °F Precipitation, In. Liquid Solid 7am 24-hour At Rain Snow/ Snow Date Max Min Obs Equiv Ice Depth Special Obs. 1 50 39 39 .20 2 60 32 52 F 3 52 38 38 .76 T 4 48 29 40 .01 T T 5 62 33 50 6 50 27 27 .18 0.3 S 7 29 24 26 .26 2.0 1 8 42 26 35 .03 0.5 2 9 50 30 42 10 48 37 40 .07 11 50 32 32 .09 12 45 25 32 13 46 28 37 T 14 40 37 39 .15 15 42 37 39 .21 F 16 59 30 41 .01 F 17 62 34 45 18 67 41 58 19 64 54 54 .02 20 54 38 42 .78 21 48 38 40 .12 F 22 44 34 38 .17 T 23 50 35 38 .05 24 76 34 64 .03 25 81 60 62 26 82 61 66 27 85 59 68 28 82 56 56 .12 29 56 42 49 .01 30 56 45 52 .06 F AVG/SUM 56.0 37.8 44.7 3.33 2.8 0.1 <--Mean EXT 85 24 - 0.78 2.0 2 Date 27 7 - 20 7 8 *=Also occurred on earlier dates Miscellaneous Stats Mean Monthly Temperature: 46.9 F Year precipitation to date: 13.28" Season snowfall to date: 94.6" Number of days with: Fog 5 Sleet 1 DETAILED OBSERVATION NOTES 1: Breezy with occasional rain and showers, ending mid-afternoon with partial clearing by evening 2: Very dense AM fog with frost this morning. Becoming mostly clear with increasing PM clouds and increasing SW winds 3: Overcast, periods of rain and showers on and off all day, became very windy this evening after 6pm with west winds gusting 45+ mph and falling temperatures with snow beginning to mix in with the rain, which totaled .76" by midnight. 4: Rain/snow ended shortly after midnight. Very windy all day with gradual clearing skies 5: Clear and cool this morning, sunny pleasant day, clouds began moving in about 6:30 pm 6: Overcast with occasional rain showers changing to sleet and snow showers this evening, increasing winds and shifting from SW to NW. COLD - SNOW 7: Very cold, windy & blustery with periods of snow showers and squalls throughout the day, heaviest this morning. 2" total snow though difficult to measure because some melted due to warm ground - may have been more. 8: Overnight snow showers another 0.5" fell for an event total of 2.8". Mostly to partly cloudy skies and continued chilly and blustery. Clearing skies by late evening. 9: Clear frosty morning, sunny skies with a few high clouds & calm winds 10: Overcast with light rain showers this morning and again this evening. Light N winds. 11: Overnight light rain & drizzle. Another system that went mostly North & South of us. Clearing skies and cool with gusty north winds. 12: Easter Sunday: Chilly AM, clear sunny skies, breezy NW winds 13: Overcast skies, light rain began late evening towards midnight (trace) 14: Light rain overnight and again late afternoon/early evening .15" fell. Overcast skies with very light E winds. 15: Overcast & cool with periods of light rain on and off all day .21" fell. Foggy as well with light NE winds 16: Dense freezing fog overnight and early morning, then sunny, clear & milder 17: Clear and cool early, sunny/mild/pleasant day with winds increasing from SW 18: Sunny with occasionally gusty W winds and a few high clouds. 3rd consecutive day with 100 or near 100 % sunshine. Quite a rarity around here! 19: Becoming mostly cloudy with a few light showers and sprinkles only .02" rain fell. 20: Temperatures dropping overnight with a cold rain moderate at times and steady through much of the day. 21: Clear early then increasing clouds with occasional afternoon rain showers 22: Chilly with AM rain showers mixed with snow at times, no accumulation. Breezy and blustery all day. 23: Rain shower shortly after midnight. Overcast & windy with decreasing clouds by late afternoon, mostly clear after sunset 24: Chilly this morning with a huge temperature inversion (low 34, 40 at 9am but 56 at the airport!) and a brief moderate rain shower (.03"). Variable clouds, breezy and becoming very mild this afternoon high 76 F. VERY WARM - RECORD HEAT 25: Mostly cloudy early and mild becoming partly to mostly sunny and breezes from SW with temperatures topping 80 for the first time this season. 26: Sunny, very warm and breezy high 82 F. 27: Sunny, breezy, record warmth high 85 F. Is this April or August??? 28: Mild early with temperatures reaching the 80s by early PM. Clouds increased and the temperatures began falling after 6pm with gusty winds and occasional rain .12" fell. 29: Rain ended overnight. Mostly cloudy to cloudy with calm to light winds. 30: Patchy fog, overcast skies, occasional light rain showers only .06" fell. MONTHLY SUMMARY April was a chilly month, but a summer-like heat wave during the final week boosted the temperatures slightly above normal, for the third consecutive month. Max temperatures ranged from a chilly 29 on the 7th to a sizzling 85 on the 27th. It was a breezy month, but less so than February or March. Despite many days of precipitation, the total was about a half-inch below normal (3.33" vs 3.81"). A lot of weather systems seemed to break up and pass just north or south of the area. April saw its usual early-month lake- effect snow event with about 3" falling on the 6th, 7th & 8th. Other than that and the late month record heat, this was a fairly quiet month. No thunderstorms were observed, the first time I can ever remember no thunderstorms in April.