828  
FOUS51 KLWX 241815  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
215 PM EDT THU JUL 24 2008  
 
VAZ054-250915-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 66 89 70 91 73  
TEMP 82 77 72 70 68 72 82 87 87 82 77 74 72 76 85 89 89 84 79 77 75 77  
DEWPT 59 58 60 60 59 61 60 58 58 61 63 64 66 67 66 66 65 68 69 67 66 66  
RH 46 52 66 71 73 68 47 38 38 49 62 71 81 74 53 47 45 59 72 71 74 69  
WIND DIR NW N N NW W SW S S SE S S S S S S S S S S S SW SW  
WIND SPD 8 3 2 2 2 2 3 5 8 5 5 4 3 3 6 9 9 6 5 4 3 4  
CLOUDS SC FW FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2  
POP 12HR 5 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 82 82 83 87 92 91 87  
MAX HEAT 83 86 87 81 92 92 85  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 88 73 90 70 89 70 86 69 85  
TEMP 87 82 76 78 89 82 74 75 88 82 74 74 85 80 73 73 84 79  
DEWPT 68 67 70 67 67 65 66 66 67 67 68 67 67 68 68 67 68 68  
PWIND DIR SW SW SW W N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B2 B2 B1 B2 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 30 30 10 10 30 30  
RAIN SHWRS C C C C C C S S S C C C  
TSTMS C C C C C C S S S C C C  
 

 
MDZ013-250915-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 61 88 67 89 70  
TEMP 80 74 68 65 63 68 80 86 86 80 74 71 69 73 83 87 87 82 77 74 72 75  
DEWPT 60 60 62 61 60 62 61 59 60 59 62 63 64 65 65 66 66 68 69 68 67 67  
RH 51 62 81 87 90 81 52 40 42 49 66 76 84 76 55 50 50 63 76 82 84 76  
WIND DIR NW W N NW W W S S S S S S S S S S S S S S SW SW  
WIND SPD 6 2 2 3 2 1 4 8 9 6 4 3 2 3 8 10 10 8 5 4 3 4  
CLOUDS SC FW FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2  
POP 12HR 5 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 81 81 86 81 85 89 89 85  
MAX HEAT 82 85 86 89 90 83  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 88 72 90 70 89 70 85 69 85  
TEMP 87 82 75 77 89 82 74 75 88 82 74 74 84 79 72 73 84 79  
DEWPT 68 67 69 67 67 65 65 64 65 66 67 67 67 68 67 67 68 68  
PWIND DIR SW SW SW W N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B2 B2 B1 B2 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 10 10 10 10 30 30  
RAIN SHWRS C C C C C C  
TSTMS C C C C C C  
 

 
MDZ011-250915-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 67 88 72 89 75  
TEMP 84 78 73 71 69 73 82 86 86 82 78 75 74 77 84 88 88 84 80 78 77 79  
DEWPT 60 59 60 59 59 60 60 59 59 58 61 63 65 65 64 66 65 68 69 69 67 67  
RH 44 52 64 66 70 64 47 40 40 44 56 66 74 67 51 48 47 59 69 74 71 67  
WIND DIR NW W N NW W W S S S S S S S S S S S S S S SW SW  
WIND SPD 6 2 2 3 2 1 4 8 10 6 4 3 2 3 6 11 10 8 5 4 3 4  
CLOUDS SC FW FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2  
POP 12HR 5 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 84 82 82 85 90 90 87 83  
MAX HEAT 84 85 86 81 90 90 85  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 88 73 90 71 89 70 86 70 86  
TEMP 87 82 76 78 89 83 75 76 88 82 74 74 85 80 73 74 85 80  
DEWPT 68 67 70 68 67 66 66 65 66 67 68 67 68 68 68 67 68 68  
PWIND DIR SW SW SW W N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B2 B2 B1 B2 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 10 10 10 10 30 30  
RAIN SHWRS C C C C C C  
TSTMS C C C C C C  
 

 
WVZ052-250915-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 56 88 60 87 63  
TEMP 82 74 66 62 59 65 79 86 85 78 70 66 63 67 79 85 85 78 71 68 66 69  
DEWPT 58 58 57 56 55 58 58 57 57 58 58 58 61 64 63 64 65 66 67 67 66 65  
RH 44 57 73 81 87 78 49 37 39 50 66 75 93 90 58 50 51 67 87 97100 87  
WIND DIR NW NW N W W SW SW S S S SE SE S S SW SW S S S S S SW  
WIND SPD 9 4 2 3 2 2 3 4 5 3 2 1 1 2 5 8 8 3 2 2 2 2  
CLOUDS SC SC FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B1  
POP 12HR 5 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 82 86 87  
MAX HEAT 83 85 85 86 87  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 87 65 90 64 87 62 85 63 82  
TEMP 85 79 70 72 88 80 69 70 85 78 67 68 83 77 68 68 81 75  
DEWPT 68 67 67 65 65 65 65 64 64 64 64 65 64 63 64 64 65 66  
PWIND DIR W W SW SW N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 10 10 10 10 30 30  
RAIN SHWRS C C C C C C  
TSTMS C C C C C C  
 

 
VAZ042-250915-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 57 89 63 90 66  
TEMP 82 74 67 63 60 66 80 87 86 79 72 68 66 70 82 88 88 81 74 71 69 72  
DEWPT 58 58 59 58 57 60 59 58 58 59 61 62 64 65 64 65 65 67 67 66 66 66  
RH 44 57 75 84 90 81 49 38 39 50 68 81 93 84 55 47 47 63 79 84 90 81  
WIND DIR NW N N NW NW W S S S S S S S S S S S S S S SW SW  
WIND SPD 9 4 3 4 3 2 3 4 6 4 3 3 2 3 5 9 8 4 4 3 3 3  
CLOUDS SC FW FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2  
POP 12HR 5 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 82 81 83 90 90 83  
MAX HEAT 83 86 86 90 90  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 87 68 90 66 88 65 85 65 84  
TEMP 85 80 72 74 88 81 71 72 86 79 70 70 84 77 69 70 83 77  
DEWPT 67 67 68 66 65 64 64 64 65 65 66 66 65 66 66 66 66 66  
PWIND DIR W SW SW SW N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 20 20 10 10 30 30  
RAIN SHWRS C C C S S S C C C  
TSTMS C C C S S S C C C  
 

 
VAZ037-250915-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 58 86 62 88 66  
TEMP 82 74 67 63 61 66 78 84 84 77 70 67 65 69 81 86 86 80 74 71 69 72  
DEWPT 56 57 57 56 55 59 59 58 59 58 60 60 63 65 63 65 65 67 68 68 67 66  
RH 41 55 70 78 81 78 52 41 43 52 71 78 93 87 54 50 50 65 82 90 93 81  
WIND DIR NW NW N N N N SE S S S S S S S SW S S S S S SW SW  
WIND SPD 5 4 4 5 3 3 4 6 6 2 1 1 1 1 4 5 5 2 1 1 1 1  
CLOUDS FW FW FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B1  
POP 12HR 0 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 82 84 84 82 88 88 82  
MAX HEAT 82 84 84 88 88  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 89 68 88 66 87 65 85 69 81  
TEMP 87 81 72 73 87 80 71 72 85 79 70 70 84 79 72 72 80 76  
DEWPT 67 68 68 67 67 66 66 66 66 66 65 64 66 67 68 68 68 66  
PWIND DIR SW SW SW S N NE NE NE N  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 30 30 10 10 30 30  
RAIN SHWRS C C C C C C S S S C C C  
TSTMS C C C C C C S S S C C C  
 

 
MDZ003-250915-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
215 PM EDT THU JUL 24 2008  
 
DATE 07/24/08 FRI 07/25/08 SAT 07/26/08 SUN  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 59 86 65 87 67  
TEMP 79 73 67 64 61 66 78 84 84 78 72 69 67 71 81 85 85 80 74 71 69 72  
DEWPT 56 56 56 55 54 57 58 57 56 55 57 59 62 63 62 63 65 66 67 67 66 65  
RH 45 55 68 73 78 73 50 40 38 45 59 70 84 76 53 48 51 62 79 87 90 79  
WIND DIR W NW E E NW SW SW SW S S SE SE SE S SW SW SW S S S S SW  
WIND SPD 9 4 2 2 2 2 4 5 6 3 2 2 1 2 5 9 8 3 3 2 2 2  
CLOUDS SC SC FW FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B1  
POP 12HR 10 10 10 40 30  
QPF 12HR 0 0 0 0.02 0.05  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS C C C C C C C  
TSTMS C C C C C C C  
HEAT INDEX 82 86 87 82  
MAX HEAT 80 83 83 86 88  
 
DATE 07/27 MON 07/28/08 TUE 07/29/08 WED 07/30/08 THU 07/31/08  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 87 65 88 64 86 63 84 64 81  
TEMP 86 79 70 71 86 79 69 70 84 77 68 69 82 76 68 68 80 75  
DEWPT 68 66 67 66 65 65 65 64 64 64 65 66 64 64 64 65 66 66  
PWIND DIR W SW SW W N NE NE NE NE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B2 B2  
POP 12HR 30 30 10 10 10 10 10 30 30  
RAIN SHWRS C C C C C C  
TSTMS C C C C C C  
 

 
 
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