618  
FOUS51 KLWX 170837  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
436 AM EDT WED OCT 17 2018  
 
VAZ054-172100-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 65 44 54 41 60  
TEMP 52 52 60 64 62 55 51 48 47 45 51 53 52 48 45 44 43 44 54 59 59 56  
DEWPT 48 45 40 42 40 41 41 38 38 36 34 32 31 36 38 37 37 37 38 40 41 45  
RH 86 77 47 45 44 59 68 68 71 70 52 44 44 63 76 76 79 76 54 49 51 66  
WIND DIR NW NW W W NW NW NW NW NW NW NW NW NW NW NW W W SW SW S S S  
WIND SPD 8 9 13 17 18 16 14 13 12 12 13 12 12 10 8 4 6 4 9 11 11 10  
CLOUDS B1 FW FW FW FW CL FW FW FW FW FW FW FW CL CL CL CL CL CL FW SC B2  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 51 65 45 54 39 56 44 62  
TEMP 53 52 65 56 49 45 54 46 40 39 56 50 46 46 62 55  
DEWPT 48 52 53 49 43 40 37 35 35 34 38 40 41 40 44 44  
PWIND DIR SW W NW NW NW SW SW W  
WIND CHAR GN GN GN GN LT LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC FW FW FW FW FW FW FW FW SC SC SC  
POP 12HR 60 30 5 5 0 0 5 10  
RAIN SHWRS C L C S  
 

 
MDZ013-172100-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 63 42 52 39 60  
TEMP 50 50 58 62 60 53 49 46 45 43 49 51 50 46 43 42 41 42 53 59 59 56  
DEWPT 45 42 41 42 40 41 39 37 36 35 33 33 33 36 37 36 36 36 37 40 41 45  
RH 83 74 53 48 47 64 68 71 70 73 54 50 52 68 79 79 82 79 54 49 51 66  
WIND DIR W W W W W NW NW NW NW NW NW NW NW NW NW NW W W SW SW SW S  
WIND SPD 5 6 12 16 17 13 12 11 10 10 11 12 11 9 5 3 4 2 8 9 10 8  
CLOUDS B1 FW CL FW FW FW FW FW FW FW FW FW FW CL CL CL CL CL CL FW SC B1  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 51 64 45 54 38 55 43 61  
TEMP 53 52 64 55 48 45 54 45 39 38 55 49 45 45 61 53  
DEWPT 48 51 53 48 43 39 36 35 34 33 37 40 40 40 43 43  
PWIND DIR SW W NW NW NW W SW W  
WIND CHAR GN GN GN GN GN LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC FW FW FW FW FW FW FW SC SC SC SC  
POP 12HR 60 30 5 5 0 5 5 10  
RAIN SHWRS C L C  
 

 
MDZ011-172100-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 63 43 52 42 60  
TEMP 51 51 58 62 61 53 49 47 46 44 49 51 51 47 44 43 42 44 54 59 59 56  
DEWPT 45 41 40 42 40 41 39 37 36 35 31 31 33 36 37 36 36 36 37 39 41 44  
RH 80 68 51 48 46 64 68 68 68 70 50 46 50 65 76 76 79 73 52 47 51 64  
WIND DIR W W W W W NW NW NW NW NW NW NW NW NW NW NW W W SW SW SW S  
WIND SPD 5 6 12 16 17 13 11 11 10 10 11 12 11 8 5 2 4 2 8 9 10 6  
CLOUDS SC FW CL FW FW FW FW FW FW FW FW FW FW CL CL CL CL CL CL FW SC B1  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 52 64 46 54 39 56 44 61  
TEMP 54 53 64 55 49 46 54 46 40 39 56 50 46 45 61 53  
DEWPT 48 51 52 48 43 39 35 33 34 33 37 39 39 40 43 43  
PWIND DIR SW W NW NW NW W SW W  
WIND CHAR GN GN GN GN LT LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC SC FW FW FW FW FW FW SC SC SC SC  
POP 12HR 60 30 5 5 0 5 5 10  
RAIN SHWRS C L C  
 

 
WVZ052-172100-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 61 42 52 37 59  
TEMP 46 46 55 60 59 52 48 46 44 43 49 51 50 44 40 39 37 38 51 57 58 54  
DEWPT 38 38 40 40 37 38 36 35 35 34 33 31 31 34 33 32 33 32 39 40 44 44  
RH 73 73 57 47 44 59 63 65 70 70 54 46 48 68 76 76 85 79 63 53 59 69  
WIND DIR W W W W NW NW NW NW NW NW NW NW NW NW W W SW SW SW S S S  
WIND SPD 6 6 13 17 17 12 11 10 9 9 11 11 10 6 3 2 4 1 6 8 8 5  
WIND GUST 27  
CLOUDS SC FW FW FW FW FW FW FW FW FW SC FW CL CL CL CL CL CL FW FW B1 B2  
POP 12HR 0 0 0 0 5  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 49 61 42 50 35 55 40 59  
TEMP 51 50 61 52 45 42 50 42 36 36 55 48 41 41 59 53  
DEWPT 47 49 49 45 40 37 33 33 32 31 37 38 36 36 41 41  
PWIND DIR S W NW NW W SW SW W  
WIND CHAR LT GN LT GN LT LT LT LT  
AVG CLOUDS OV OV B2 B1 SC SC SC FW FW FW FW SC FW SC SC SC  
POP 12HR 60 20 10 5 5 5 5 10  
RAIN SHWRS C L S  
 

 
VAZ506-172100-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 64 41 53 37 60  
TEMP 48 49 58 63 61 53 48 46 44 43 49 52 51 45 42 40 39 40 52 58 59 55  
DEWPT 44 42 39 41 39 40 39 37 36 35 33 32 32 35 36 35 35 35 38 40 42 45  
RH 86 77 49 44 44 61 71 71 73 73 54 46 48 68 79 82 85 82 59 51 53 69  
WIND DIR NW W W W NW NW NW NW NW NW NW NW NW NW NW W W SW SW S S S  
WIND SPD 4 5 12 16 17 13 10 10 9 9 11 11 10 6 3 2 3 2 8 10 10 8  
CLOUDS B1 FW FW FW FW CL FW FW FW FW FW FW CL CL CL CL CL CL FW FW B1 B2  
POP 12HR 0 0 0 0 5  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 50 64 43 52 35 55 41 61  
TEMP 52 51 64 54 47 43 52 44 37 36 55 47 42 42 61 54  
DEWPT 48 50 51 46 42 39 35 34 33 32 37 39 39 38 42 42  
PWIND DIR SW W NW NW NW SW SW W  
WIND CHAR GN GN GN GN LT LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC FW FW FW FW FW FW FW SC SC SC SC  
POP 12HR 60 20 5 5 0 0 5 10  
RAIN SHWRS C L S  
 

 
VAZ037-172100-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 67 43 56 39 61  
TEMP 52 52 61 66 64 55 50 48 46 45 52 55 54 47 44 42 40 41 53 59 60 56  
DEWPT 47 45 42 42 40 43 41 38 36 35 34 33 33 38 36 34 34 34 39 41 43 45  
RH 83 77 49 42 41 64 71 68 68 68 50 43 45 71 73 73 79 76 59 51 53 66  
WIND DIR W W W W NW NW NW NW NW NW N NW N N N W W SW S S S S  
WIND SPD 4 4 8 11 11 9 6 5 5 6 6 5 4 3 2 1 2 2 5 9 8 6  
CLOUDS B1 SC CL CL CL CL FW FW FW CL CL CL CL CL CL CL CL CL FW FW B2 B1  
POP 12HR 0 0 0 0 5  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 51 65 43 54 36 56 42 62  
TEMP 53 51 65 55 46 44 54 45 38 37 56 48 43 43 62 55  
DEWPT 48 50 52 46 41 38 34 34 33 32 36 39 39 38 43 43  
PWIND DIR SW W W NW NW SW SW W  
WIND CHAR LT GN LT GN LT LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC SC FW FW FW FW FW FW FW FW SC SC  
POP 12HR 60 30 5 5 0 0 5 5  
RAIN SHWRS C L C  
 

 
MDZ003-172100-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 58 39 50 37 58  
TEMP 45 45 53 57 56 49 45 43 41 41 46 49 48 43 40 39 38 39 51 56 57 53  
DEWPT 38 37 39 39 37 38 37 34 34 33 31 30 31 34 32 32 32 32 38 39 44 43  
RH 76 73 59 51 49 66 73 70 76 73 55 48 51 70 73 76 79 76 61 53 62 69  
WIND DIR W W W W NW NW NW NW NW NW NW NW NW NW W W SW SW SW S S S  
WIND SPD 6 6 14 18 19 13 12 9 8 9 12 12 11 8 4 2 3 2 6 8 9 6  
WIND GUST 29 31  
CLOUDS FW FW FW FW SC FW FW FW FW FW FW FW FW FW CL CL CL CL FW FW B1 B2  
POP 12HR 0 0 0 0 5  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 48 60 41 49 35 53 40 58  
TEMP 50 49 60 51 45 41 49 41 36 36 53 47 41 41 58 51  
DEWPT 46 49 48 44 40 37 32 33 32 31 35 37 36 37 41 41  
PWIND DIR SW W NW NW W SW SW W  
WIND CHAR LT GN GN GN LT LT LT LT  
AVG CLOUDS B2 OV B2 B1 SC SC SC FW FW FW FW SC SC SC SC SC  
POP 12HR 60 20 10 5 5 5 10 10  
RAIN SHWRS C L S S  
 

 
MDZ017-172100-  
PATUXENT RIVER NAS MD  
38.29N 76.41W ELEV. 39 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 68 48 56 46 62  
TEMP 57 58 64 67 66 58 54 52 51 49 53 55 55 51 48 47 46 47 56 61 61 59  
DEWPT 53 52 47 47 45 45 43 42 40 38 37 37 37 39 39 40 40 39 42 43 45 46  
RH 86 80 54 49 47 62 66 69 66 66 54 51 51 63 71 76 79 74 59 51 56 62  
WIND DIR W NW NW W W NW NW NW NW NW NW NW NW NW NW NW NW W W SW SW SW  
WIND SPD 8 9 11 12 16 17 19 19 18 16 14 13 12 12 11 6 6 2 6 9 12 11  
WIND GUST 27 31 31 29  
CLOUDS OV B1 FW FW FW CL CL FW FW FW FW FW FW CL CL CL CL CL CL FW SC B1  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 55 67 49 56 43 56 48 62  
TEMP 56 56 67 58 52 49 56 49 44 43 56 53 49 49 62 57  
DEWPT 50 53 56 52 46 41 41 38 39 37 39 41 44 44 46 46  
PWIND DIR SW W NW NW NW W SW W  
WIND CHAR GN GN GN BZ GN LT GN GN  
AVG CLOUDS B1 OV B2 B1 SC SC FW FW FW FW FW FW FW FW SC SC  
POP 12HR 60 50 10 5 5 5 5 10  
RAIN SHWRS S L C C  
 

 
WVZ502-172100-  
PETERSBURG WV  
38.99N 79.15W ELEV. 963 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 60 41 52 37 65  
TEMP 47 47 55 59 58 51 47 45 43 43 48 51 50 43 40 38 37 38 54 63 63 57  
DEWPT 39 38 40 37 36 40 37 35 35 33 32 30 29 35 34 32 33 30 37 38 41 45  
RH 74 71 57 44 44 66 68 68 73 67 54 44 44 73 79 79 85 73 52 39 44 64  
WIND DIR W SW W W W NW NW NW NW NW NW NW NW W W SW W SW S S SW S  
WIND SPD 5 5 12 13 14 10 9 8 6 6 6 6 6 4 3 2 3 2 3 4 5 5  
CLOUDS SC FW FW FW FW FW FW FW FW FW FW FW CL CL CL CL CL CL FW FW OV OV  
POP 12HR 0 0 0 0 5  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 49 59 40 48 33 58 40 59  
TEMP 52 49 59 50 44 40 48 41 35 34 57 49 43 41 59 53  
DEWPT 48 49 47 45 39 36 33 34 31 30 35 39 36 37 40 41  
PWIND DIR SW W NW NW W SW SW W  
WIND CHAR LT GN LT GN LT LT LT LT  
AVG CLOUDS OV OV B2 B1 B1 SC SC SC FW FW FW FW FW SC SC SC  
POP 12HR 60 40 30 10 5 5 10 10  
RAIN SHWRS C L C C C C  
 

 
MDZ014-172100-  
ANNAPOLIS MD  
38.99N 76.49W ELEV. 7 FT  
436 AM EDT WED OCT 17 2018  
 
DATE WED 10/17/18 THU 10/18/18 FRI 10/19/18  
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 64 44 53 43 60  
TEMP 52 53 60 63 62 54 50 48 47 45 50 52 52 48 46 45 44 45 54 59 59 57  
DEWPT 48 43 41 44 43 43 41 39 38 36 34 35 35 38 38 37 37 37 39 42 43 46  
RH 86 69 49 50 50 66 71 71 71 70 54 52 52 68 73 73 76 73 57 53 55 67  
WIND DIR W NW W W W NW NW NW NW NW NW NW NW NW NW NW W W SW SW SW S  
WIND SPD 6 8 12 16 17 14 14 14 12 12 13 13 12 10 9 4 5 2 8 10 12 10  
CLOUDS B1 FW CL FW FW CL FW FW FW FW FW FW FW CL CL CL CL CL CL FW SC B1  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S  
 
DATE SAT 10/20/18 SUN 10/21/18 MON 10/22/18 TUE 10/23/18  
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 53 65 47 55 41 56 45 61  
TEMP 54 54 65 56 50 47 55 47 42 41 56 51 46 46 61 54  
DEWPT 49 52 54 50 45 41 38 36 36 35 39 41 41 42 45 45  
PWIND DIR SW W NW NW NW W SW W  
WIND CHAR GN GN GN BZ GN LT LT GN  
AVG CLOUDS B2 OV B2 B1 SC SC FW FW FW FW FW FW FW SC SC SC  
POP 12HR 60 30 5 5 0 0 5 5  
RAIN SHWRS S L C S  
 

 
 
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