MONTHLY WEATHER DATA AND OBS - LAVALE MD							
APRIL 2007							
OBSERVERS DAVID DREWERY AND CHARLES ORLICK
							
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		Rain	Snow/	Snow	
Date	Max	Min	Equiv	Ice	Depth	Special Obs.

1	60	48	 .47			F,T
2	82	46	 .01			F
3	82	44
4	61	36	 .07
5	36	31	   T	 0.1	 T		
6	38	30	   T	 0.1	 T
7	35	26	   T	 0.2	 T
8	37	28	   T	 0.1
9	46	32
10	49	29
11	43	28	 .27
12	50	39	 .45			F
13	52	37	 .01
14	50	33	 .90
15	47	37	 .70			F
16	40	35	 .32	 T	 T
17	45	40	 .02
18	51	40
19	55	45
20	69	40
21	79	37
22	86	39
23	84	43
24	74	58
25	65	46	 .04
26	58	49	 .39			F
27	72	52	 .03
28	62	48	   T
29	75	43
30	81	46

AVG/SUM	58.8	39.5	3.68	 0.5	-
EXT	86	26	0.90	 0.1	-
Date	22	7	14	 7*	-
*=Also occurred on earlier dates
							
Miscellaneous Stats
			
Mean Monthly Temperature:  49.2 F						
Year precipitation to date:  11.26"						
Season snowfall to date:  35.5"						
Number of days with:

Fog  5
Thunder  1
Sleet  0
Glaze  0
Hail  0
Damaging Wind  0
							
DETAILED OBSERVATION NOTES
							
1: Thundershower around 8am, remaining mostly cloudy through the day, then a couple more brief thunder-
   showers this evening around 5pm and 10:30pm.
WARM
2: Dense fog cleared by 9am.  Became breezy after noon with W winds gusting to 20 mph.  Warm high 82 F.
3: Cloudy early then mostly sunny and warm high 82 F.  Some clouds again by 4pm.
4: Predawn shower and remained cloudy until 1pm, then partly cloudy with gusts from NW to 30 mph.
5: Mostly cloudy with occasional snow flurries and gusts from NW at 20 mph.  Cold high only 36 F.
COLD - BLUSTERY - SNOW FLURRIES
6: Light pre-dawn snow showers.  Partly cloudy with gusts from W at 20mph.
7: Partly cloudy with snow flurries. Breezes from N at 10 mph.
8: Partly cloudy, continued blustery and cold with snow flurries.
9: Mostly cloudy with breezes from W at 10mph.
10: Mostly cloudy with gusts from NW at 10mph.
11: Cloudy and mostly calm. Light rain started at 1pm and continued through much of the PM hours.
12: Cloudy with occasional rain. Gusty winds began this morning and short periods of sun.
13: Cloudy and breezy.
RAIN - WIND - COLDER - MOUNTAIN SNOW
14: Cloudy and calm.  Began to drizzle at 1600 hrs with moderate to occasionally heavy rain arriving
    during the evening.
15: Cloudy with rain tapering off around dawn.  A total of 1.60" fell overnight.  Became very windy with
    north winds gusting to 40 mph.
16: Cloudy with periods of light rain and snow.  Windy with gusts from NW 30+ mph.  No snow accumulation
    here but substantial accumulations on nearby ridges.  Storm total precip 1.92".
17: Mostly cloudy with calmer winds.
18: Partly cloudy and mostly calm.
19: Partly cloudy and calm.
20: Sunny and warmer high 69 F.
21: Sunny and warmer yet high 79 F.
22: Sunny and very warm high 86 F with light E breezes.
23: Sunny, becoming partly cloudy and breezy after noon.  Continued very warm high 84 F.
24: Partly cloudy, becoming mostly sunny during the afternoon with north winds gusting 20+ mph.
25: Mostly cloudy and cooler, calm wind.  Occasional light showers.
26: Cloudy and cool with a period of rain during the late afternoon and evening.
27: Rain ending shortly after midnight.  Became partly sunny and milder.
28: Mostly cloudy, breezy and cool with occasional light drizzle.
29: Mostly sunny and breezy during the mid-afternoon hours.
30: Mostly sunny, warm and breezy. 

MONTHLY SUMMARY	

This was the coolest April since 1997 and the second coolest overall (since records began in 1992).
After a brief early warm-up, temperatures plummeted below freezing for a week straight (5th-11th).
Temperatures finally returned to seasonal from the 20th on, with a couple of brief warm streaks.
Meanwhile, this was the 3rd consecutive month with a big storm at mid-month.  A Northeaster brought
heavy rain and high wind on the 14th-15th and heavy mountain snows on the 16th.  Overall,
precipitation was near average.

Additional notes/records

5: Record low max 36 F
6: Record low max 38 F
7: Max of 35 F just misses all-time record low max for April of 34 set on this date in 2003.
8: Record low max 37 F.  0.1" snowfall (daily record)
16: Record low max 40 F.  Trace of snow.
24: Record high min 58 F.

April 2007 had the 5th lowest mean max temperature on record, 58.8 F.