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39 °F
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Potomac, Maryland |
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| Local Time: 10:34 PM EST on December 21, 2009 (GMT -05) — Set My Timezone | Lat/Lon: 39.0° N 77.2° W (Google Map) | ||||
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Leesburg, Virginia (Airport)
Updated: 10:20 PM EST on December 21, 2009
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: Top of Page :
| Weather Stations |  |
| Station Location | Temp. | Dew Point | Humidity | Wind | Pressure | Precipitation | Windchill | Elevation | Updated | Type | |||
| Potomac, MD | 29.2 °F | 21 °F | 70% |
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29.97 in | 0.00 in / hr | 29 °F | 361 ft | 10:33 PM EST | Normal | |||
| APRSWXNET Great Falls V, Great Falls, VA | 35 °F | 27 °F | 72% |
|
30.08 in | 0.00 in / hr | 35 °F | 296 ft | 10:03 PM EST | MADIS | Website | ||
| Falcon Ridge, Great Falls, VA | 33.7 °F | 29 °F | 82% |
|
30.13 in | 0.00 in / hr | 34 °F | 275 ft | 10:31 PM EST | Normal | |||
| APRSWXNET Great Falls VA , Great Falls, VA | 33 °F | 26 °F | 75% |
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30.12 in | 0.00 in / hr | 33 °F | 380 ft | 10:14 PM EST | MADIS | Website | ||
| Potomac Highlands, Rockville, MD | 28.0 °F | 20 °F | 73% |
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30.14 in | 0.00 in / hr | 28 °F | 350 ft | 10:34 PM EST | Normal | |||
| North Potomac, MD | 27.5 °F | 24 °F | 85% |
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29.85 in | 0.00 in / hr | 28 °F | 0 ft | 10:30 PM EST | Normal | |||
| MDDOT I-495 at Am Lgn Br, Cabin John, MD | 34 °F | 24 °F | 66% |
|
- | 0.00 in / hr | 34 °F | 46 ft | 10:13 PM EST | MADIS | Website | ||
| Lake Fairfax, Vienna, VA | 30.2 °F | 24 °F | 79% |
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29.91 in | 0.00 in / hr | 30 °F | 275 ft | 10:34 PM EST | Rapid Fire | Website | ||
| Great Falls, Great Falls, VA | 32.8 °F | 27 °F | 79% |
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30.15 in | 0.00 in / hr | 33 °F | 339 ft | 10:34 PM EST | Rapid Fire | |||
| APRSWXNET Bethesda MD , Washington, DC | 31 °F | 24 °F | 76% |
|
30.07 in | 0.00 in / hr | 31 °F | 403 ft | 10:18 PM EST | MADIS | Website | ||
| APRSWXNET Great Falls VA , Sterling, VA | 33 °F | 27 °F | 79% |
|
30.15 in | 0.00 in / hr | 33 °F | 321 ft | 10:00 PM EST | MADIS | Website | ||
| Kentlands, Gaithersburg, MD | 33.8 °F | 24 °F | 68% |
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29.99 in | 0.00 in / hr | 34 °F | 380 ft | 10:34 PM EST | Rapid Fire | |||
| VADOT Dulles_Toll_Rd_E_Plaza, Vienna, VA | 34 °F | 26 °F | 73% |
|
- | 0.00 in / hr | 34 °F | 416 ft | 10:10 PM EST | MADIS | Website | ||
| King Farm, Rockville, MD | 32.9 °F | 26 °F | 75% |
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30.15 in | 0.00 in / hr | 33 °F | 479 ft | 10:34 PM EST | Rapid Fire | |||
| MDDOT I-270 @ I-370, Gaithersburg, MD | 34 °F | 23 °F | 64% |
|
- | 0.00 in / hr | 34 °F | 449 ft | 10:12 PM EST | MADIS | Website | ||
| APRSWXNET McLean VA , McLean, VA | 32 °F | 28 °F | 85% |
|
30.12 in | 0.00 in / hr | 32 °F | 265 ft | 10:18 PM EST | MADIS | Website | ||
| Longhorn, Gaithersburg, MD | 31.6 °F | 22 °F | 68% |
|
30.09 in | 0.00 in / hr | 32 °F | 420 ft | 10:30 PM EST | Normal | |||
| Langley Fork Park, McLean, VA | 31.7 °F | 26 °F | 80% |
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30.15 in | 0.00 in / hr | 32 °F | 272 ft | 10:34 PM EST | Rapid Fire | |||
| Hawk Ridge Subdivision (South), Reston, VA | 28.4 °F | 23 °F | 81% |
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30.10 in | 0.00 in / hr | 28 °F | 300 ft | 10:30 PM EST | Normal | Website | ||
| Beulah-Wolf Trap, Vienna, VA | 30.2 °F | 25 °F | 80% |
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30.13 in | 0.00 in / hr | 30 °F | 430 ft | 10:34 PM EST | Rapid Fire | Website | ||
| Weatherscience.net, Potomac Falls, VA | 35.4 °F | 28 °F | 75% |
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29.82 in | 0.00 in / hr | 35 °F | 276 ft | 10:34 PM EST | Rapid Fire | Website | ||
| Cedar Cove Cluster, Reston, VA | 34.0 °F | 27 °F | 75% |
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30.11 in | 0.00 in / hr | 34 °F | 350 ft | 10:33 PM EST | Rapid Fire | |||
| Cloppers Mill East, Germantown, MD | - | - | - |
|
- | 0.00 in / hr | - | 328 ft | 10:34 PM EST | Rapid Fire | Website | ||
| Tysons Woods, Vienna, VA | 30.9 °F | 26 °F | 80% |
|
30.14 in | 0.00 in / hr | 31 °F | 480 ft | 10:34 PM EST | Rapid Fire | Website | ||
| MDDOT I-495 @ Connecticut Ave, Bethesda, MD | 32 °F | 25 °F | 75% |
|
- | 0.00 in / hr | 32 °F | 230 ft | 10:20 PM EST | MADIS | Website | ||
| Flower Valley, Rockville, MD | 28.0 °F | 20 °F | 73% |
|
29.86 in | 0.00 in / hr | 28 °F | 0 ft | 10:33 PM EST | Normal | |||
| Trott Ave, Vienna, VA | 31.9 °F | 26 °F | 79% |
|
30.16 in | - / hr | 32 °F | 415 ft | 10:32 PM EST | Normal | |||
| Montgomery Village, MD | 31.1 °F | 21 °F | 67% |
|
30.09 in | 0.00 in / hr | 31 °F | 350 ft | 10:34 PM EST | Rapid Fire | Website | ||
| APRSWXNET Germantown MD , Germantown, MD | 31 °F | 24 °F | 75% |
|
30.09 in | 0.00 in / hr | 31 °F | 433 ft | 10:20 PM EST | MADIS | Website | ||
| VADOT Site_G, Herndon, VA | 33 °F | 26 °F | 71% |
|
- | 0.00 in / hr | 33 °F | 339 ft | 10:04 PM EST | MADIS | Website | ||
| VADOT Site_E, Oakton, VA | 34 °F | 27 °F | 75% |
|
- | 0.00 in / hr | 34 °F | 353 ft | 10:03 PM EST | MADIS | Website | ||
| VADOT Site_C, Oakton, VA | 33 °F | 26 °F | 75% |
|
- | 0.00 in / hr | 33 °F | 290 ft | 10:06 PM EST | MADIS | Website |
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Warnings and Notices
 |
Special Weather Statement | |
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Statement as of 9:06 PM EST on December 21, 2009 ... Icy conditions overnight into Tuesday morning... Temperatures will fall into the upper teens and 20s across the mid Atlantic region tonight. Any water from snow melt and slush from saturdays storm is expected to freeze... forming areas of black ice. Any roadways... bridges and overpasses... and sidewalks that have not been treated may become very slippery and dangerous. Please use extra caution overnight into Tuesday morning and be aware of the potential to encounter icy conditions. The re-freezing of snow melt and slush during the nighttime is expected to continue through mid week as overnight temperatures will fall into the teens and twenties through Wednesday night. |
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