307  
FOUS51 KLWX 210834  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
433 AM EDT SAT OCT 21 2017  
 
VAZ054-212100-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 75 54 75 57 76  
TEMP 53 53 66 74 74 63 59 57 55 55 66 74 74 66 62 60 58 58 70 75 75 68  
DEWPT 49 46 49 47 48 50 51 51 51 52 57 56 56 57 58 57 57 56 61 60 60 61  
RH 86 77 54 38 40 62 75 80 86 90 73 53 53 73 87 90 96 93 73 60 60 78  
WIND DIR W N E SE SE SE SE S SE SE SE S SE SE SE S S S S S S SE  
WIND SPD 3 4 3 4 6 5 4 2 3 2 4 5 8 5 5 3 4 3 5 6 8 3  
CLOUDS CL CL FW FW SC FW FW FW FW SC SC SC SC SC FW SC SC B1 SC B1 B1 B1  
POP 12HR 0 0 0 5 50  
QPF 12HR 0 0 0 0 0.01  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 63 71 50 62 43 61 44 67  
TEMP 65 64 67 61 55 50 62 52 46 44 59 52 46 45 66 56  
DEWPT 63 63 63 57 50 45 42 41 39 38 40 41 42 41 46 48  
PWIND DIR S S W W NW W SW SW  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B1 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 60 90 50 20 10 10 10 10  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
MDZ013-212100-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 76 52 75 57 76  
TEMP 48 50 66 74 74 62 57 55 53 54 66 74 74 66 63 60 58 59 70 75 75 66  
DEWPT 45 44 47 45 46 49 50 51 51 51 56 55 55 57 58 57 58 57 61 60 60 60  
RH 89 80 50 35 37 62 77 86 93 90 70 51 51 73 84 90100 93 73 60 60 81  
WIND DIR N N E SE SE SE SE S SE SE SE S SE SE S S S S S S S S  
WIND SPD 1 3 3 4 5 4 3 2 3 1 4 5 8 4 5 3 5 3 6 8 9 4  
CLOUDS CL CL CL FW SC FW FW SC FW SC SC SC SC SC SC SC SC B1 SC B1 SC B1  
POP 12HR 0 0 0 5 40  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 63 71 50 61 43 60 44 67  
TEMP 64 64 69 61 55 50 61 52 46 44 58 52 46 45 66 58  
DEWPT 62 63 63 57 49 45 41 40 38 37 39 40 40 40 45 47  
PWIND DIR S S W W NW NW SW SW  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B1 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 60 90 50 20 10 10 10 5  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
MDZ011-212100-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 75 55 74 59 76  
TEMP 52 55 67 74 74 64 59 57 56 56 67 73 73 66 64 62 60 60 70 75 75 68  
DEWPT 46 45 45 45 45 49 52 52 52 52 56 55 55 57 59 58 59 58 61 60 60 61  
RH 80 69 45 35 35 58 78 83 86 86 68 53 53 73 84 87 96 93 73 60 60 78  
WIND DIR SW N E SE SE SE SE SE SE E SE S SE SE S S S S S S S S  
WIND SPD 1 3 3 4 5 3 3 2 2 1 4 5 8 4 5 2 5 2 5 8 9 3  
CLOUDS CL CL CL FW SC FW FW SC FW SC SC SC SC SC SC SC SC B1 SC B1 SC B1  
POP 12HR 0 0 0 5 40  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 64 71 51 62 44 60 46 67  
TEMP 65 65 68 62 55 52 62 54 47 45 59 52 48 47 66 58  
DEWPT 63 63 63 58 50 45 41 40 39 38 39 39 41 40 45 48  
PWIND DIR S S W W NW NW SW SW  
WIND CHAR LT BZ LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B1 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 60 90 50 20 10 10 10 5  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
WVZ052-212100-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 76 47 75 51 75  
TEMP 43 44 61 73 74 59 54 52 49 48 60 71 74 62 57 55 53 52 65 72 75 64  
DEWPT 40 41 48 47 48 48 48 47 45 45 52 54 54 54 53 52 50 50 56 60 60 59  
RH 89 89 62 40 40 67 80 83 86 89 75 55 50 75 86 90 89 93 73 66 60 84  
WIND DIR NW NW SE SE SE SE SE SE SE SE SE S SE SE SE S S S S S S S  
WIND SPD 1 2 2 5 6 5 3 2 2 1 3 8 9 5 5 3 4 2 5 8 8 3  
CLOUDS CL FW CL FW SC FW FW SC FW SC FW SC FW SC FW SC FW B1 SC B1 B1 B2  
POP 12HR 0 0 0 5 60  
QPF 12HR 0 0 0 0 0.04  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C C L  
OBVIS PF PF  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 59 70 43 59 37 59 37 67  
TEMP 61 59 66 57 49 43 58 47 40 38 58 47 40 38 64 54  
DEWPT 59 59 60 52 44 39 38 38 36 34 39 38 36 34 45 45  
PWIND DIR S SW W W W W SW S  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B2 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 70 90 40 20 10 10 10 10  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
VAZ506-212100-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 77 50 76 54 76  
TEMP 45 47 65 74 75 61 57 54 51 51 65 74 75 64 60 56 55 55 67 74 75 66  
DEWPT 45 43 48 46 46 49 50 49 48 49 55 55 54 56 56 55 54 54 59 60 59 60  
RH 100 86 54 37 36 65 77 83 89 93 70 51 48 75 87 96 96 96 75 62 58 81  
WIND DIR NW N E SE SE SE SE S SE SE S S SE SE SE S S S S S S S  
WIND SPD 1 3 3 4 5 5 4 3 3 1 4 6 8 5 5 3 4 3 5 8 8 3  
CLOUDS CL CL FW FW SC FW FW SC FW SC FW FW FW SC FW SC FW B1 SC B1 B1 B2  
POP 12HR 0 0 0 5 50  
QPF 12HR 0 0 0 0 0.03  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 62 71 46 61 39 60 40 67  
TEMP 62 62 67 59 50 46 60 49 43 40 58 48 42 41 64 56  
DEWPT 61 61 62 56 48 42 40 40 38 36 39 39 39 38 45 47  
PWIND DIR S S W W NW W SW S  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B1 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 70 90 40 20 10 10 10 10  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
VAZ037-212100-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 80 48 78 52 74  
TEMP 50 49 68 78 78 61 57 54 50 50 66 75 77 62 57 56 53 53 66 73 73 65  
DEWPT 47 45 50 50 51 51 51 50 47 47 54 55 55 55 54 53 51 52 58 60 59 60  
RH 89 86 52 37 39 70 80 86 89 89 65 50 47 78 90 90 93 96 75 64 62 84  
WIND DIR NW NW SE SE SE SE SE S S W S S S S S S S S S S S SE  
WIND SPD 1 2 2 4 5 4 2 2 2 1 3 6 8 4 3 2 2 2 5 6 6 2  
CLOUDS CL CL FW FW SC FW FW SC FW SC CL FW FW SC FW SC SC B1 SC B1 B1 B2  
POP 12HR 0 0 0 5 60  
QPF 12HR 0 0 0 0 0.04  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C C L  
OBVIS PF PF  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 59 70 41 61 36 61 37 69  
TEMP 62 59 67 59 48 41 60 47 40 37 60 48 43 39 66 55  
DEWPT 60 59 60 53 44 38 38 38 36 33 39 39 37 35 46 47  
PWIND DIR S S W W W W SW SW  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS OV OV B2 B2 B1 SC SC SC SC SC FW FW FW FW FW FW  
POP 12HR 70 90 30 20 10 5 5 10  
RAIN SHWRS L L D D S S S S  
TSTMS S S  
 

 
MDZ003-212100-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 75 49 73 52 74  
TEMP 51 46 64 72 74 61 56 54 51 50 63 71 72 62 56 55 53 53 64 72 73 65  
DEWPT 42 41 45 44 46 47 47 47 46 46 52 53 53 54 53 53 53 53 57 59 59 58  
RH 71 83 50 37 37 60 72 77 83 86 67 53 51 75 90 93100100 78 64 62 78  
WIND DIR NW N SE S SE SE SE SE SE SE S S SE SE SE S S S S S S S  
WIND SPD 3 3 3 5 6 5 5 3 3 2 5 8 9 6 6 3 5 3 6 8 9 3  
CLOUDS CL FW CL FW SC FW FW SC FW SC FW FW FW SC FW SC SC B1 SC B1 B1 B2  
POP 12HR 0 0 0 5 60  
QPF 12HR 0 0 0 0 0.04  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C C L  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 59 69 44 58 38 58 39 65  
TEMP 62 60 66 59 50 44 57 48 42 39 56 47 42 40 62 53  
DEWPT 59 60 60 53 45 40 37 38 36 35 38 38 37 36 43 45  
PWIND DIR S SW W W W W SW SW  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS B2 OV OV B2 B2 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 70 90 40 20 10 10 10 10  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
MDZ017-212100-  
PATUXENT RIVER NAS MD  
38.29N 76.41W ELEV. 39 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 73 57 73 60 75  
TEMP 50 56 69 73 71 62 60 58 58 58 68 72 72 65 63 61 60 61 71 75 74 67  
DEWPT 49 51 52 50 51 54 56 56 56 57 59 58 59 60 62 61 60 60 62 62 62 63  
RH 96 83 55 44 49 75 87 93 93 96 73 61 64 84 97100100 97 73 64 66 87  
WIND DIR W N NE E SE SE SE SE SE SE SE SE SE SE SE S S S S S S SE  
WIND SPD 5 4 4 4 4 5 6 5 5 3 5 6 8 5 8 5 6 4 6 8 10 6  
CLOUDS FW CL CL FW FW FW FW FW FW SC SC SC SC SC SC SC SC B1 SC B1 SC B1  
POP 12HR 0 0 0 5 40  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 65 73 53 62 45 61 47 67  
TEMP 67 67 70 64 58 53 62 53 48 46 59 51 49 49 66 56  
DEWPT 64 65 65 60 54 48 43 43 41 41 41 42 43 44 47 51  
PWIND DIR S S W W NW NW W SW  
WIND CHAR GN BZ GN GN GN GN GN GN  
AVG CLOUDS B2 OV OV B2 B1 B1 SC SC SC SC SC SC FW FW FW FW  
POP 12HR 50 90 50 20 10 10 10 5  
RAIN SHWRS C C D D C C S S S S  
TSTMS S S  
 

 
WVZ502-212100-  
PETERSBURG WV  
38.99N 79.15W ELEV. 963 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 78 49 77 53 76  
TEMP 42 45 60 75 76 61 56 54 51 50 60 75 75 62 57 55 55 54 65 75 74 66  
DEWPT 41 44 51 52 52 51 51 50 49 48 54 53 52 51 52 52 52 52 56 58 56 57  
RH 96 96 72 45 43 70 83 86 93 93 81 46 45 67 83 90 90 93 73 55 53 73  
WIND DIR SW SW S SE SE S S S S S S S S S S S S S S S S S  
WIND SPD 1 3 3 5 5 4 4 3 3 2 4 5 8 5 5 3 5 3 5 8 6 3  
CLOUDS FW CL FW FW SC FW FW SC SC SC FW FW FW SC FW SC FW B1 SC B2 B2 OV  
POP 12HR 0 0 0 5 70  
QPF 12HR 0 0 0 0 0.04  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C L  
OBVIS PF PF PF  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 59 68 41 56 37 59 38 70  
TEMP 62 60 63 57 47 42 55 47 40 38 57 47 42 39 66 53  
DEWPT 58 58 56 48 42 38 36 36 37 35 38 37 36 35 45 44  
PWIND DIR S SW W W W W SW SW  
WIND CHAR LT GN LT LT LT LT LT LT  
AVG CLOUDS OV OV B2 B2 B1 SC SC B1 B1 SC SC SC FW FW FW FW  
POP 12HR 80 90 30 20 20 10 10 10  
RAIN SHWRS D D D D C C S S S S  
TSTMS S S  
 

 
MDZ014-212100-  
ANNAPOLIS MD  
38.99N 76.49W ELEV. 7 FT  
433 AM EDT SAT OCT 21 2017  
 
DATE SAT 10/21/17 SUN 10/22/17 MON 10/23/17  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 73 56 72 59 74  
TEMP 53 54 66 72 72 63 59 58 57 57 67 71 71 65 63 61 59 60 70 73 73 65  
DEWPT 50 48 50 50 51 53 54 54 54 54 58 58 58 59 60 59 59 59 62 62 61 62  
RH 89 80 56 46 48 70 83 86 90 90 73 63 63 81 90 93100 96 76 68 66 90  
WIND DIR N N E SE SE SE SE S SE SE SE S SE S S S S S S S S S  
WIND SPD 1 3 4 4 4 4 4 3 4 2 5 5 8 5 6 4 6 4 6 9 10 5  
CLOUDS CL CL CL FW FW FW FW SC FW SC SC SC SC SC SC SC SC B1 SC B1 SC B1  
POP 12HR 0 0 0 5 40  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C  
 
DATE TUE 10/24/17 WED 10/25/17 THU 10/26/17 FRI 10/27/17  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 64 71 52 61 46 59 47 66  
TEMP 65 64 68 61 56 52 61 54 49 47 58 52 49 48 64 57  
DEWPT 64 64 64 59 51 46 43 43 40 39 41 42 43 43 48 50  
PWIND DIR S S W W NW NW SW SW  
WIND CHAR GN BZ LT LT LT GN LT GN  
AVG CLOUDS B2 OV OV B2 B1 SC SC SC SC SC SC SC FW FW FW FW  
POP 12HR 60 90 50 20 10 10 10 5  
RAIN SHWRS L L D D C C S S  
TSTMS S S  
 

 
 
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