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The Data originates at the National Weather Service, and is
made available here by the
UAlbany Department of Atmospheric and Environmental Sciences
Surface Observations
KDAA 162355Z AUTO 17004KT 10SM CLR 21/04 A3009 RMK AO2 SLP192 T02110042 10246
20210 53003 $=
KDAA 170055Z 15005KT 7SM CLR 18/06 A3011 RMK A02A SLP199=
KDAA 170155Z AUTO 14004KT 10SM CLR 17/07 A3012 RMK AO2 SLP202 T01730068 $=
KDAA 170255Z AUTO 14005KT 10SM CLR 17/07 A3011 RMK AO2 SLP199 T01710069 50007 $=
KDAA 170355Z AUTO 15005KT 10SM BKN160 17/07 A3010 RMK AO2 SLP195 T01700068 $=
KDAA 170455Z AUTO 14005KT 10SM SCT140 BKN160 16/06 A3011 RMK AO2 SLP199
T01630059 402460108 $=
KDAA 170555Z AUTO 15006KT 10SM BKN160 16/04 A3011 RMK AO2 SLP199 T01630043
10212 20162 55000 $=
KDAA 170655Z AUTO 15005KT 10SM BKN140 BKN170 16/03 A3010 RMK AO2 SLP195
T01580032 $=
KDAA 170755Z AUTO 17005KT 10SM SCT110 OVC170 16/02 A3011 RMK AO2 SLP199
T01580019 $=
KDAA 170855Z AUTO 14004KT 10SM FEW120 BKN160 15/02 A3009 RMK AO2 SLP192
T01540022 55007 $=
KDAA 170955Z AUTO 13005KT 10SM FEW065 FEW150 15/02 A3009 RMK AO2 SLP192
T01470019 $=
KDAA 171055Z AUTO 14004KT 10SM CLR 14/02 A3009 RMK AO2 SLP192 T01430019 $=
KDAA 171155Z AUTO 15004KT 10SM CLR 16/04 A3009 RMK AO2 SLP192 T01600041 10165
20139 53000 $=
KDAA 171255Z AUTO 16005KT 10SM FEW140 16/06 A3008 RMK AO2 SLP189 T01610057 $=
KDAA 171355Z AUTO 22005KT 10SM SCT120 17/08 A3010 RMK AO2 SLP195 T01650077 $=
Decoded Surface Observations
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 07:55 PM EDT was:
The skies were clear.
Temperature: 70F ( 21C) Dewpoint: 40F ( 4C) Relative Humidity: 33%
Winds from the S (170 degs) at 5 mph.
Pressure: 1019.2 millibars. Altimeter:30.09 inches of mercury.
The prevailing visibility was 10 miles.
The maximum temperature in the past 6 hours was 76F.
The minimum temperature in the past 6 hours was 70F.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 08:55 PM EDT was:
The skies were clear.
Temperature: 64F ( 18C) Dewpoint: 43F ( 6C) Relative Humidity: 45%
Winds from the SE (150 degs) at 6 mph.
Pressure: 1019.9 millibars. Altimeter:30.11 inches of mercury.
The prevailing visibility was 7 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 09:55 PM EDT was:
The skies were clear.
Temperature: 63F ( 17C) Dewpoint: 44F ( 7C) Relative Humidity: 50%
Winds from the SE (140 degs) at 5 mph.
Pressure: 1020.2 millibars. Altimeter:30.12 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 10:55 PM EDT was:
The skies were clear.
Temperature: 63F ( 17C) Dewpoint: 44F ( 7C) Relative Humidity: 51%
Winds from the SE (140 degs) at 6 mph.
Pressure: 1019.9 millibars. Altimeter:30.11 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 11:55 PM EDT was:
The skies were mostly cloudy.
Temperature: 63F ( 17C) Dewpoint: 44F ( 7C) Relative Humidity: 51%
Winds from the SE (150 degs) at 6 mph.
Pressure: 1019.5 millibars. Altimeter:30.10 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 12:55 AM EDT was:
The skies were mostly cloudy.
Temperature: 61F ( 16C) Dewpoint: 43F ( 6C) Relative Humidity: 50%
Winds from the SE (140 degs) at 6 mph.
Pressure: 1019.9 millibars. Altimeter:30.11 inches of mercury.
The prevailing visibility was 10 miles.
The maximum temperature in the past 24 hours was 76F.
The minimum temperature in the past 24 hours was 51F.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 01:55 AM EDT was:
The skies were mostly cloudy.
Temperature: 61F ( 16C) Dewpoint: 40F ( 4C) Relative Humidity: 45%
Winds from the SE (150 degs) at 7 mph.
Pressure: 1019.9 millibars. Altimeter:30.11 inches of mercury.
The prevailing visibility was 10 miles.
The maximum temperature in the past 6 hours was 70F.
The minimum temperature in the past 6 hours was 61F.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 02:55 AM EDT was:
The skies were mostly cloudy.
Temperature: 60F ( 16C) Dewpoint: 38F ( 3C) Relative Humidity: 43%
Winds from the SE (150 degs) at 6 mph.
Pressure: 1019.5 millibars. Altimeter:30.10 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 03:55 AM EDT was:
The skies were cloudy.
Temperature: 60F ( 16C) Dewpoint: 35F ( 2C) Relative Humidity: 39%
Winds from the S (170 degs) at 6 mph.
Pressure: 1019.9 millibars. Altimeter:30.11 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 04:55 AM EDT was:
The skies were mostly cloudy.
Temperature: 60F ( 15C) Dewpoint: 36F ( 2C) Relative Humidity: 41%
Winds from the SE (140 degs) at 5 mph.
Pressure: 1019.2 millibars. Altimeter:30.09 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 05:55 AM EDT was:
The skies were mostly clear.
Temperature: 58F ( 15C) Dewpoint: 35F ( 2C) Relative Humidity: 42%
Winds from the SE (130 degs) at 6 mph.
Pressure: 1019.2 millibars. Altimeter:30.09 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 06:55 AM EDT was:
The skies were clear.
Temperature: 58F ( 14C) Dewpoint: 35F ( 2C) Relative Humidity: 43%
Winds from the SE (140 degs) at 5 mph.
Pressure: 1019.2 millibars. Altimeter:30.09 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 07:55 AM EDT was:
The skies were clear.
Temperature: 61F ( 16C) Dewpoint: 39F ( 4C) Relative Humidity: 45%
Winds from the SE (150 degs) at 5 mph.
Pressure: 1019.2 millibars. Altimeter:30.09 inches of mercury.
The prevailing visibility was 10 miles.
The maximum temperature in the past 6 hours was 62F.
The minimum temperature in the past 6 hours was 57F.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 08:55 AM EDT was:
The skies were mostly clear.
Temperature: 61F ( 16C) Dewpoint: 42F ( 6C) Relative Humidity: 50%
Winds from the SSE(160 degs) at 6 mph.
Pressure: 1018.9 millibars. Altimeter:30.08 inches of mercury.
The prevailing visibility was 10 miles.
The weather observed at FORT BELVOIR/DAV, VA (KDAA) at 09:55 AM EDT was:
The skies were partly cloudy.
Temperature: 62F ( 17C) Dewpoint: 46F ( 8C) Relative Humidity: 56%
Winds from the SW (220 degs) at 6 mph.
Pressure: 1019.5 millibars. Altimeter:30.10 inches of mercury.
The prevailing visibility was 10 miles.
Short Range Forecast
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Zone Forecast
VAZ053-180300-
Fairfax-
Including the cities of Reston, Herndon, Annandale, Centreville,
Chantilly, McLean, and Franconia
756 PM EDT Wed Apr 17 2024
.TONIGHT...Mostly cloudy. Scattered showers, mainly this evening.
Lows around 60. Southeast winds 5 to 10 mph, becoming west after
midnight. Chance of rain 40 percent.
.THURSDAY...Mostly sunny. Highs in the upper 70s. Northwest winds
5 to 10 mph.
.THURSDAY NIGHT...Mostly clear in the evening, then becoming
mostly cloudy. Lows in the upper 40s. East winds 5 to 10 mph.
.FRIDAY...Mostly cloudy. A chance of showers in the afternoon.
Highs in the upper 60s. Southeast winds 5 to 10 mph. Chance of
rain 50 percent.
.FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of
showers. Lows in the lower 50s. Southeast winds around 5 mph,
becoming north after midnight.
.SATURDAY...Mostly sunny. Highs in the upper 60s.
.SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s.
.SUNDAY...Partly sunny. Highs in the lower 60s.
.SUNDAY NIGHT...Mostly cloudy. Lows in the mid 40s.
.MONDAY...Mostly sunny. Highs in the mid 60s.
.MONDAY NIGHT...Partly cloudy. Lows in the mid 40s.
.TUESDAY...Mostly sunny. Highs around 70.
.TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of
showers. Lows in the lower 50s.
.WEDNESDAY...Mostly sunny. Highs around 70.
State Forecast
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State Forecast Discussion
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GFS Short-Range Model Output Statistics (MOS) Forecast
KDAA GFS MOS GUIDANCE 4/17/2024 1800 UTC
DT /APR 18 /APR 19 /APR 20
HR 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 12 18
N/X 57 78 50 69 49
TMP 70 66 62 60 61 71 75 76 69 59 54 53 53 59 66 67 63 59 55 52 68
DPT 58 59 58 57 57 54 50 47 48 48 47 46 46 47 48 49 50 51 49 44 35
CLD BK OV OV SC SC BK SC CL CL SC OV OV OV OV OV OV OV OV OV BK OV
WDR 14 15 28 30 30 31 31 32 03 07 00 00 10 15 15 15 15 27 32 33 29
WSP 03 02 03 02 03 11 10 09 04 02 00 00 02 04 04 04 03 01 02 03 08
P06 28 1 2 0 0 0 5 28 21 5 5
P12 36 3 0 28 23
Q06 0 0 0 0 0 0 0 0 0 0 0
Q12 0 0 0 0 0
T06 22/ 5 0/ 0 0/ 1 0/ 4 0/ 0 0/ 0 1/ 0 7/10 3/ 2 2/ 7
T12 0/ 3 0/ 5 4/ 3 8/11 4/ 7
POZ 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
POS 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
TYP R R R R R R R R R R R R R R R R R R R R R
SNW 0 0
CIG 8 7 6 8 8 8 8 8 8 6 4 3 2 4 6 6 6 6 7 8 8
VIS 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
OBV N N N N N N N N N N N N N N N N N N N N N
GFS Long-Range Model Output Statistics (MOS) Forecast
KDAA GFSX MOS GUIDANCE 4/17/2024 1200 UTC
FHR 24 36| 48 60| 72 84| 96 108|120 132|144 156|168 180|192
THU 18| FRI 19| SAT 20| SUN 21| MON 22| TUE 23| WED 24|THU CLIMO
N/X 58 79| 50 68| 51 70| 41 65| 41 67| 41 68| 45 70| 47 44 70
TMP 62 69| 53 62| 53 60| 47 58| 48 58| 48 61| 51 62| 52
DPT 55 49| 47 54| 44 39| 35 35| 37 36| 41 41| 44 43| 43
CLD PC CL| PC OV| OV OV| PC PC| OV CL| CL PC| PC PC| PC
WND 4 12| 3 4| 4 8| 8 8| 3 5| 1 7| 7 14| 7
P12 31 5| 1 22| 41 13| 11 16| 9 11| 12 13| 20 17| 20999999
P24 31| 22| 41| 16| 22| 16| 28| 35
Q12 0 0| 0 0| 1 0| 0 0| 0 0| 0 0| |
Q24 0| 0| 0| 0| 0| 0| |
T12 22 0| 1 3| 6 6| 5 0| 2 1| 2 4| 5 10| 5
T24 | 1 | 6 | 6 | 2 | 4 | 7 | 16
PZP 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0 0| 0
PSN 0 0| 0 0| 0 0| 0 1| 1 0| 5 1| 1 4| 3
PRS 1 0| 0 1| 1 1| 4 1| 1 1| 2 2| 2 0| 1
TYP R R| R R| R R| R R| R R| R R| R R| R
SNW 0| 0| 0| 0| 0| 0| |
NGM Model Output Statistics (MOS) Forecast
Climatological Summary
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Watch and Warning Statment
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Park/Ski Recreation Report/Forecast
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