Station Overview Station Location
Station Number MD-PG-47 Latitude 38.996389
Station Name Greenbelt 2.2 E Longitude -76.84444
County Prince George's Elevation (ft) 214



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 10 3.55 2.53 2 2.53 2 0.00 0 0 2 0 0.0 0 0
Nov 10 3.50 0.45 1 0.45 1 0.00 0 0 1 0 0.0 0 0
Dec 10 3.30 1.91 4 1.91 4 0.00 0 0 3 0 1.1 1 1
Jan 11 3.02 0.57 2 0.57 2 0.00 0 0 2 0 0.0 0 0
Feb 11 2.80 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 11 3.76 4.57 8 4.57 8 0.00 0 0 8 0 0.0 0 0
April 11 3.39 2.01 11 2.01 11 0.00 0 0 10 0 0.0 0 0
May 11 4.35 1.40 8 1.40 8 0.00 0 0 8 0 0.0 0 0
June 11 3.79 0.17 2 0.17 2 0.00 0 0 1 0 0.0 0 0
July 11 4.13 1.41 5 1.04 3 0.37 2 1 2 0 0.0 0 0
Aug 11 3.41 3.90 28 1.88 5 2.02 23 3 5 0 0.0 0 0
Sept 11 3.90 6.42 15 3.23 5 3.19 10 3 4 0 0.0 0 0
Water Year Totals: 42.90" 25.34" 86 days 19.76" 51 5.58" 35 days 7 46 days 0 days 1.1" 1 days 1 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2010 1.90
10/2/2010
10/3/2010
10/4/2010 0.63
10/5/2010
10/6/2010
10/7/2010
10/8/2010
10/9/2010
10/10/2010
10/11/2010
10/12/2010
10/13/2010
10/14/2010
10/15/2010
10/16/2010
10/17/2010
10/18/2010
10/19/2010
10/20/2010
10/21/2010
10/22/2010
10/23/2010
10/24/2010
10/25/2010
10/26/2010
10/27/2010
10/28/2010
10/29/2010
10/30/2010
10/31/2010
11/1/2010
11/2/2010
11/3/2010
11/4/2010
11/5/2010
11/6/2010
11/7/2010
11/8/2010
11/9/2010
11/10/2010
11/11/2010
11/12/2010
11/13/2010
11/14/2010
11/15/2010
11/16/2010 0.45
11/17/2010
11/18/2010
11/19/2010
11/20/2010
11/21/2010
11/22/2010
11/23/2010
11/24/2010
11/25/2010
11/26/2010
11/27/2010
11/28/2010
11/29/2010
11/30/2010
12/1/2010 0.89
12/2/2010
12/3/2010
12/4/2010
12/5/2010
12/6/2010
12/7/2010
12/8/2010
12/9/2010
12/10/2010 0.00
12/11/2010
12/12/2010 0.90
12/13/2010
12/14/2010
12/15/2010
12/16/2010 0.12
12/17/2010
12/18/2010
12/19/2010
12/20/2010
12/21/2010
12/22/2010
12/23/2010
12/24/2010
12/25/2010
12/26/2010
12/27/2010
12/28/2010
12/29/2010
12/30/2010
12/31/2010
Day of YearDaily PrcpMultiday Prcp
1/1/2011
1/2/2011
1/3/2011
1/4/2011
1/5/2011
1/6/2011
1/7/2011
1/8/2011
1/9/2011
1/10/2011
1/11/2011 0.14
1/12/2011
1/13/2011
1/14/2011
1/15/2011
1/16/2011
1/17/2011
1/18/2011 0.43
1/19/2011
1/20/2011
1/21/2011
1/22/2011
1/23/2011
1/24/2011
1/25/2011
1/26/2011
1/27/2011
1/28/2011
1/29/2011
1/30/2011
1/31/2011
2/1/2011
2/2/2011
2/3/2011
2/4/2011
2/5/2011
2/6/2011
2/7/2011
2/8/2011
2/9/2011
2/10/2011
2/11/2011
2/12/2011
2/13/2011
2/14/2011
2/15/2011
2/16/2011
2/17/2011
2/18/2011
2/19/2011
2/20/2011
2/21/2011
2/22/2011
2/23/2011
2/24/2011
2/25/2011
2/26/2011
2/27/2011
2/28/2011
3/1/2011
3/2/2011
3/3/2011
3/4/2011
3/5/2011
3/6/2011
3/7/2011 1.25
3/8/2011
3/9/2011
3/10/2011 1.93
3/11/2011 0.04
3/12/2011
3/13/2011
3/14/2011
3/15/2011
3/16/2011 0.64
3/17/2011
3/18/2011
3/19/2011
3/20/2011
3/21/2011 0.31
3/22/2011
3/23/2011 0.02
3/24/2011 0.21
3/25/2011
3/26/2011
3/27/2011
3/28/2011
3/29/2011
3/30/2011
3/31/2011 0.17
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.16
4/2/2011
4/3/2011 0.12
4/4/2011
4/5/2011 0.48
4/6/2011
4/7/2011
4/8/2011 0.20
4/9/2011
4/10/2011
4/11/2011
4/12/2011 0.25
4/13/2011 0.15
4/14/2011
4/15/2011
4/16/2011
4/17/2011
4/18/2011
4/19/2011 0.04
4/20/2011
4/21/2011
4/22/2011
4/23/2011 0.53
4/24/2011
4/25/2011 0.04
4/26/2011
4/27/2011 0.00
4/28/2011 0.04
4/29/2011
4/30/2011
5/1/2011 0.03
5/2/2011
5/3/2011
5/4/2011 0.62
5/5/2011
5/6/2011
5/7/2011
5/8/2011
5/9/2011
5/10/2011
5/11/2011
5/12/2011
5/13/2011
5/14/2011
5/15/2011
5/16/2011
5/17/2011 0.14
5/18/2011 0.22
5/19/2011 0.34
5/20/2011 0.02
5/21/2011
5/22/2011
5/23/2011 0.02
5/24/2011
5/25/2011
5/26/2011
5/27/2011 0.01
5/28/2011
5/29/2011
5/30/2011
5/31/2011
6/1/2011 0.00
6/2/2011
6/3/2011
6/4/2011
6/5/2011
6/6/2011
6/7/2011
6/8/2011
6/9/2011
6/10/2011
6/11/2011
6/12/2011
6/13/2011
6/14/2011
6/15/2011
6/16/2011
6/17/2011
6/18/2011
6/19/2011
6/20/2011
6/21/2011
6/22/2011
6/23/2011
6/24/2011
6/25/2011
6/26/2011
6/27/2011
6/28/2011
6/29/2011 0.17
6/30/2011
Day of YearDaily PrcpMultiday Prcp
7/1/2011
7/2/2011
7/3/2011
7/4/2011
7/5/2011 0.90
7/6/2011
7/7/2011
7/8/2011 0.00
7/9/2011
7/10/2011
7/11/2011
7/12/2011
7/13/2011 **
7/14/2011 0.37
7/15/2011
7/16/2011
7/17/2011
7/18/2011
7/19/2011
7/20/2011
7/21/2011
7/22/2011
7/23/2011
7/24/2011
7/25/2011
7/26/2011 0.14
7/27/2011
7/28/2011
7/29/2011
7/30/2011
7/31/2011
8/1/2011
8/2/2011 0.58
8/3/2011
8/4/2011 0.14
8/5/2011 **
8/6/2011 **
8/7/2011 **
8/8/2011 **
8/9/2011 **
8/10/2011 0.18
8/11/2011 **
8/12/2011 **
8/13/2011 **
8/14/2011 **
8/15/2011 1.66
8/16/2011
8/17/2011
8/18/2011 0.12
8/19/2011 0.22
8/20/2011
8/21/2011 0.82
8/22/2011 **
8/23/2011 **
8/24/2011 **
8/25/2011 **
8/26/2011 **
8/27/2011 **
8/28/2011 **
8/29/2011 **
8/30/2011 **
8/31/2011 **
9/1/2011 **
9/2/2011 3.05
9/3/2011 0.00
9/4/2011
9/5/2011 0.56
9/6/2011 1.37
9/7/2011
9/8/2011
9/9/2011
9/10/2011
9/11/2011
9/12/2011
9/13/2011
9/14/2011
9/15/2011
9/16/2011
9/17/2011
9/18/2011
9/19/2011 **
9/20/2011 **
9/21/2011 0.12
9/22/2011
9/23/2011 **
9/24/2011 **
9/25/2011 **
9/26/2011 **
9/27/2011 0.02
9/28/2011 0.15
9/29/2011 1.15
9/30/2011



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 10:46 AM 1.90 M M M M +1.90" @10:46 AM from remnants of Nicole (APE).
10/4/2010 6:57 PM 0.63 M M M M Rain began yesterday evening. 0.62" from overnight rain, recorded at 11:41 AM. +0.01" at 6:57 PM, though rain stopped for several hours.
11/16/2010 4:18 PM 0.45 M M M M 0.37" at 1:38 PM +0.08" at 4:18.
12/1/2010 11:59 PM 0.89 M M M M Evening rain began after 4:20 PM yesterday. 0.49" at 9:05 AM +0.40" APE (recorded 3:27 PM 12/2/10, though rain probably ended by 2:00 PM 12/1/10).
12/10/2010 11:59 PM 0.00 0.0 0.00 M M Overcast in the morning. A few snowflakes in the air by 11:51 AM; fewer by 12:04 PM; only an occasional flake at 12:23. Snow stopped, with clouds gradually thinning by 12:45; no detectable snow on the ground. The sky remained overcast most of the afternoon.
12/12/2010 8:19 PM 0.90 M M M M 0.9" rain since rains began last evening around 7:30 PM; recorded at 8:19 PM today.
12/16/2010 8:07 PM 0.12 1.1 0.12 1.1 0.12 0.8" snow on ground at 1:27 PM. 1.1" on ground by 8:07 (estimate 0.12" H2O); snow has stopped.
1/11/2011 11:59 PM 0.14 M 0.14 M M First snowflakes around 1:20 PM. Then intermittent light snow (no accumulation until after 3:42). Precipitation recorded 1:33 PM 1/12/11: 0.14" H2O from melt of snow in catch bucket (estimate 2.0" snow); due to drifting following end of snowfall, could not directly measure the original snow depth.
1/18/2011 11:59 PM 0.43 M M M M 0.43" total liquid from rain, sleet of 1/17/11-1/18/11 (recorded at 2:37 PM 1/19/11).
3/7/2011 10:44 AM 1.25 M M M M Bulk of rain probably occurred yesterday into night. 1.25" at 10:44 AM (APE)
3/10/2011 9:36 PM 1.93 M M M M Sprinkles began yesterday afternoon. 1.08" at 11:00 AM +0.17" at 12:33 PM +0.68" at 9:36.
3/11/2011 11:09 AM 0.04 M M M M Additional 0.04" from continuation of yesterday's rain, recorded at 11:09 AM (APE).
3/16/2011 10:31 AM 0.64 M M M M 0.64" at 10:31 AM.
3/21/2011 9:43 AM 0.31 M M M M 0.31" from early morning rain, recorded at 9:43 AM. Lower portion of 22 degree halo at 1:35 PM.
3/23/2011 10:07 AM 0.02 M M M M 0.02" from overnight rain, recorded at 10:07 AM.
3/24/2011 4:39 PM 0.21 M M M M 0.21" from overnight rain, recorded at 4:39 PM.
3/31/2011 2:54 PM 0.17 M M M M A bit of misty drizzle at 11:48 AM. Very light fog and 0.16" at 12:11 PM. Very light fog and +0.01" at 2:54 PM.
4/1/2011 6:30 PM 0.16 M M M M
4/3/2011 9:57 AM 0.12 M M M M 0.12" from combined 4/2/11 and 4/3/11 rains.
4/5/2011 12:52 PM 0.48 M M M M
4/8/2011 3:14 PM 0.20 M M M M 0.06" at 11:12 AM. Afternoon rain begins at 1:03 PM. +0.14" at 3:14, and still raining lightly.
4/12/2011 3:43 PM 0.25 M M M M Sprinkles, trace of rain at 9:18 AM; light rain by 9:30. 0.20" at 10:53 (and beginning to sprinkle again) +0.02" and 30% clear at 12:20. Brief light rain ca. 2:00-2:40; +0.01" at 3:43.
4/13/2011 11:59 PM 0.15 M M M M 0.15" from yesterday afternoon and overnight rains. Recorded at10:01 AM 4/14/11.
4/19/2011 4:40 PM 0.04 M M M M Sprinkling at 10:21 AM; stops shortly thereafter. First soft thunder at 11:09. Sprinkles begin at 11:13. Light rain and occasional soft distant thunder follow. Thunder somewhat closer at 11:17. Fairly close, long roll of thunder, sprinkling at 11:21. Rain, thunder stopped, 0.04" in gauge at 11:31. Gradual drying; occasional weak sunshine comes and goes thereafter. Upper portion of 22 degree halo in thin cirrostratus at 4:40 PM.
4/23/2011 1:51 PM 0.53 M M M M Intermittent rain began around midday yesterday, ending in midmorning today. 0.53" recorded at 1:51 PM.
4/25/2011 3:30 PM 0.04 M M M M 0.04" rain from yesterday afternoon (4/24/11) and overnight.
4/27/2011 12:59 PM 0.00 0.0 M M M Rain gauge DRY at 9:55 AM on 4/28/11, so NO rain in evening of 4/27/11.
4/28/2011 11:36 AM 0.04 M M M M First sprinkles at 10:36 AM; light rain by 10:39. Wet; first soft thunder at 10:51. Light/moderate rain waxes and wanes; occasional soft rolling thunder. Rain stopped, overcast brightening a bit; 0.04" at 11:36.
5/1/2011 12:59 PM 0.03 M M M M 0.03" recorded at 11:57 AM on 5/3/11 (includes 0.01" as estimate of evaporative loss).
5/4/2011 1:29 PM 0.62 M M M M 0.62" from early morning, morning rains. More predicted for this afternoon.
5/17/2011 4:33 PM 0.14 M M M M Overnight and breakfast-time rains; 0.12" recorded at 11:15 AM. Dark clouds, moving rapidly from SE, produced additional 0.02" rain in a brief shower from 3:56 to 4:08 PM.
5/18/2011 2:20 PM 0.22 M M M M 0.02" (probably from last evening's rains in our general area); beginning to sprinkle at 10:43 AM. Intermittent light rain during the morning; +0.09" with very light rain at 12:23 PM. +0.11" at 2:09; brief period of sunshine as tri-level clouds break up somewhat. Overcast again by 2:18.
5/19/2011 3:44 PM 0.34 M M M M Variable cloudiness, occasionally overcast, in morning and early afternoon. Rain begins at 3:03 PM, occasionally heavy, ends by 3:25. 0.34" recorded at 3:44; very dark clouds E-NE.
5/20/2011 5:09 PM 0.02 M M M M 0.02" at 10:52 AM. Variable cloudiness through the day; no further rain.
5/23/2011 1:20 PM 0.02 M M M M 0.02" from overnight rain, recorded at 1::20 PM.
5/27/2011 11:59 PM 0.01 M M M M 0.01" from evening thunderstorms; recorded 1:21 PM Saturday 5/28/11.
6/1/2011 11:59 PM 0.00 0.0 M M M NO rain in gauge from late afternoon thunderstorms (Recorded at 11:37 AM, Thursday 6/2/11).
6/29/2011 10:20 AM 0.17 M M M M 0.17" from last evening/overnight rains.
7/5/2011 10:28 AM 0.90 M M M M 0.90" in gauge at 10:28 AM from 7/3/11 and 7/4/11 rains. Based on evaporation measured from a gauge at a nearby location (Station MD-PG-12 Bowie 2.8 WNW), an additional 0.07" or so should also be included.
7/8/2011 12:59 PM 0.00 0.0 M M M 1.65" in afternoon, early evening rains. Recorded the next day at 12:34 PM (on Saturday, July 9, 2011).
7/26/2011 12:34 PM 0.14 M M M M 0.14" (covers 7/25 and 7/26), most of which fell in afternoon of 7/25.
8/2/2011 11:27 AM 0.58 M M M M Light sprinkles at 5:05 PM yesterday (8/1/11). 0.58" probably mostly from the subsequent storm. Recorded at 11:27 AM today (8/2/11).
8/4/2011 11:37 AM 0.14 M M M M 0.14" from rains yesterday afternoon to present (8/3/11 - 8/4/11).
8/18/2011 6:36 PM 0.12 M M M M Gradual darkening of clouds from W. A few large drops of rain at 4:24 PM.First thunder at 4:43, but no rain. Thunder and light wind at 4:50, 5:27, 6:00. Rain begins at 6:10. Lightning 2 seconds distant at 6:11. Rain over, 0.12"; dark rainfall between azimuth ~280 and ~310 degrees at 6:36.
8/19/2011 7:33 PM 0.22 M M M M 0.03" from overnight rain, adding to rain from late yesterday afternoon, recorded at 9:37 AM. Grey clouds from W, sudden nearby thunder at 6:04 PM; much cloud-ground lightning (mostly to S-SE) and thunder in subsequent storm. Scud beginning to appear slightly to SE (moving from ~E) beneath dark clouds by 6:37. Moderate wind up quickly, but no rain yet, at 6:46; wind waxes and wanes subsequently. See wetting of road to S, advancing slowly toward me; rain starts here at 7:05; lightning less frequent, moving off. Moderate big-drop rain starts suddenly at 7:08, lasts until 7:10, and abates shortly thereafter. Rain stopped, increased scud continues from SE, at 7:20. Scud now evident even fairly far SE at 7:25. 0.19", light E wind, grey rain over much of distant SE, OC breaking locally at 7:33; temperature has dropped significantly since late afternoon.
8/21/2011 3:59 PM 0.82 M M M M First storm: light rain begins at1:16 PM. Occasional soft thunder. Rain stopped by 1:35. 0.03” rain; Cloud-Ground lightning to NE, at 1:56. Second storm: sprinkling, distant thunder at 2:56. Light/moderate gusty wind up; occasional soft thunder; getting quite dark at 3:06. High overcast from WSW, but rapidly forming scud is moving from ~E, at 3:09; scud/low clouds gradually expand to SE, but continue to come from ~E. Thunder nearer, more frequent by 3:16. Moderate rain by 3:20; fairly heavy by 3:21; heavy by 3:22; moderate, with lighter overcast by 3:23. Lightning 9 sec. high at 3:24, 5 sec. high at 3:25. Light/moderate rain, wind dropped to very light; occasional thunder by 3:26. Rain moderately heavy by 3:28:30, heavy 3:29 – 3:35, with fairly frequent relatively close lightning. Rain very heavy at 3:36, slackens to heavy at 3:37, moderate by 3:37:30, light by 3:38:30, very light by 3:40, and trails off thereafter. C-G stroke 10 sec SW at 3:41. Lightning and thunder off to SE; calm by 3:52. Clearing to SW, but dark and stormy E-SE; +0.79” at 3:59.
9/3/2011 11:41 AM 0.00 0.0 M M M Sprinkles of large drops, driving between Stations MD-PG-12 and MD-PG-47, from 11:41 to 11:50 AM. No measurable amount.
9/5/2011 6:36 PM 0.56 0.0 M M M No overnight rain (gauge dry at 8:40 AM). After 9 AM, sky gradually darkens; rain begins at 9:35, waxes and wanes, ends at 9:53 with 0.16", recorded at 10:05. Afternoon rain begins at 4:00, waxes and wanes as several cells pass through. Rain ends at 6:32. Additional 0.40" recorded at 6:36.
9/6/2011 7:43 AM 1.37 M M M M 1.37" from overnight rain, recorded at 7:43 AM; beginning to sprinkle lightly, too.
9/28/2011 6:28 PM 0.15 M M M M Rain recorded at 3:36 PM; no rain observed thereafter.
9/29/2011 10:12 AM 1.15 M M M M 1.15" recorded at 10:12 AM; most of this probably fell during thunderstorms after dinner last night.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
7/13/2011 7/14/2011 10:46 AM 2 0.37 M M First sprinkles at 2:42 PM 7/13/11; very light rain by 2:45. Rain picked up as I then drove east from site.
8/5/2011 8/10/2011 10:33 AM 6 0.18 M M Most rain on 8/9/11.
8/9/2011 8/10/2011 10:33 AM 2 0.18 M M 0.18"; mostly (all?) from afternoon rain on 8/9/11.
8/11/2011 8/15/2011 1:48 PM 5 1.66 M M Empty gauge with 1.30", mostly from storms of 8/13/11 - 8/14/11, and a brief shower just before 12:10 PM. Sprinkling again by 1:06. Moderate rain at 1:09. First thunder at 1:11. Light - moderate rain and fairly frequent thunder to 1:17. Light rain continues, less frequent thunder at 1:23. Just sprinkling by 1:27. +0.36" at 1:48. Distant rain curtain between azimuths of 250 and 265 degrees E of N at 3:44.
8/22/2011 9/02/2011 10:40 AM 12 3.05 M M
9/19/2011 9/21/2011 9:43 AM 3 0.12 M M Covers rain from 5:25 PM Monday 9/19/11 to 9:43 AM Wednesday 9/21/11.
9/23/2011 9/27/2011 5:55 PM 5 0.02 M M Covers period from 1:12 AM Friday 9/23/11 to 5:55 PM Tuesday 9/27/11. Includes traces of rain in sprinkles around 11:37 AM, 1:11 PM and 5:55 PM on 9/27/11.



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground