| 17:00 EST |  Mostly Cloudy | 4°C / 39°F | -3°C / 27°F | 61% | 1018 mb (30.06 in) | NW 15 kph (NW 9.2 mph) | - | 10SM |
| | KMRN 052200Z AUTO 30008G15KT 10SM BKN038 04/M03 A3006 RMK AO2 |
| 16:40 EST |  Partly Cloudy | 4°C / 39°F | -2°C / 28°F | 65% | 1018 mb (30.06 in) | NW 13 kph (NW 8.1 mph) | - | 10SM |
| | KMRN 052140Z AUTO 32007KT 10SM SCT038 04/M02 A3005 RMK AO2 |
| 16:20 EST |  Partly Cloudy | 5°C / 41°F | -3°C / 27°F | 57% | 1018 mb (30.06 in) | NW 24 kph (NW 15 mph) | - | 10SM |
| | KMRN 052120Z AUTO 32013G23KT 10SM SCT037 05/M03 A3005 RMK AO2 |
| 16:00 EST |  Partly Cloudy | 6°C / 43°F | -2°C / 28°F | 57% | 1017 mb (30.03 in) | NW 26 kph (NW 16.1 mph) | - | 10SM |
| | KMRN 052100Z AUTO 31014G20KT 10SM SCT037 06/M02 A3003 RMK AO2 |
| 15:40 EST |  Clear | 6°C / 43°F | -2°C / 28°F | 57% | 1017 mb (30.03 in) | NW 20 kph (NW 12.7 mph) | - | 10SM |
| | KMRN 052040Z AUTO 30011KT 10SM CLR 06/M02 A3002 RMK AO2 |
| 15:20 EST |  Partly Cloudy | 6°C / 43°F | -2°C / 28°F | 57% | 1016 mb (30 in) | NW 15 kph (NW 9.2 mph) | - | 10SM |
| | KMRN 052020Z AUTO 30008KT 10SM SCT085 06/M02 A3001 RMK AO2 |
| 15:00 EST |  Mostly Cloudy | 6°C / 43°F | -1°C / 30°F | 61% | 1016 mb (30 in) | NW 24 kph (NW 15 mph) | - | 10SM |
| | KMRN 052000Z AUTO 30013G16KT 10SM BKN085 06/M01 A3000 RMK AO2 |
| 14:40 EST |  Partly Cloudy | 6°C / 43°F | 1°C / 34°F | 71% | 1016 mb (30 in) | NW 15 kph (NW 9.2 mph) | - | 10SM |
| | KMRN 051940Z AUTO 32008KT 10SM SCT080 06/01 A2999 RMK AO2 |
| 14:21 EST |  Overcast | 6°C / 43°F | 2°C / 36°F | 76% | 1015 mb (29.97 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KMRN 051921Z AUTO 35004KT 10SM SCT060 OVC080 06/02 A2998 RMK AO2 |
| 14:00 EST |  Overcast | 6°C / 43°F | 2°C / 36°F | 76% | 1015 mb (29.97 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KMRN 051900Z AUTO 36003KT 10SM SCT048 SCT060 OVC070 06/02 A2997 RMK AO2 |
| 13:40 EST |  Overcast | 5°C / 41°F | 3°C / 37°F | 87% | 1015 mb (29.97 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KMRN 051840Z AUTO 01004KT 10SM BKN047 OVC070 05/03 A2996 RMK AO2 |
| 13:22 EST |  Overcast | 5°C / 41°F | 3°C / 37°F | 87% | 1015 mb (29.97 in) | Calm | - | 10SM |
| | KMRN 051822Z AUTO 00000KT 10SM BKN043 OVC048 05/03 A2996 RMK AO2 |
| 13:00 EST |  Overcast | 5°C / 41°F | 3°C / 37°F | 87% | 1015 mb (29.97 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KMRN 051800Z AUTO 34004KT 10SM SCT035 OVC041 05/03 A2997 RMK AO2 |
| 12:40 EST |  Overcast | 4°C / 39°F | 2°C / 36°F | 87% | 1015 mb (29.97 in) | NW 11 kph (NW 6.9 mph) | - | 10SM |
| | KMRN 051740Z AUTO 31006KT 10SM OVC039 04/02 A2998 RMK AO2 |
| 12:20 EST |  Overcast | 4°C / 39°F | 2°C / 36°F | 87% | 1015 mb (29.97 in) | NW 13 kph (NW 8.1 mph) | - | 10SM |
| | KMRN 051720Z AUTO 32007KT 10SM OVC031 04/02 A2998 RMK AO2 |
| 12:00 EST |  Overcast Light Snow | 4°C / 39°F | 2°C / 36°F | 87% | 1016 mb (30 in) | NW 15 kph (NW 9.2 mph) | - | 5SM |
| | KMRN 051700Z AUTO 32008G15KT 5SM -SN SCT012 BKN022 OVC029 04/02 A2999 RMK AO2 |
| 11:40 EST |  Overcast Light Snow | 6°C / 43°F | 5°C / 41°F | 93% | 1016 mb (30 in) | NW 13 kph (NW 8.1 mph) | 1.02 mm (0.04 in) | 3SM |
| | KMRN 051640Z AUTO 32007KT 3SM -SN SCT003 BKN018 OVC024 06/05 A2999 RMK AO2 P0004 |
| 11:20 EST |  Overcast Light Snow | 6°C / 43°F | 6°C / 43°F | 100% | 1016 mb (30 in) | W 9 kph (W 5.8 mph) | 0.51 mm (0.02 in) | 1 1/2SM |
| | KMRN 051620Z AUTO 27005KT 1 1/2SM -SN SCT001 BKN019 OVC024 06/06 A2999 RMK AO2 P0002 |
| 11:00 EST |  Overcast Light Snow | 6°C / 43°F | 6°C / 43°F | 100% | 1016 mb (30 in) | SSW 7 kph (SSW 4.6 mph) | - | 1 3/4SM |
| | KMRN 051600Z AUTO 25004KT 1 3/4SM -SN BKN001 BKN018 OVC025 06/06 A2999 RMK AO2 |
| 10:40 EST |  Overcast Rain | 6°C / 43°F | 6°C / 43°F | 100% | 1016 mb (30 in) | SSW 7 kph (SSW 4.6 mph) | 0.51 mm (0.02 in) | 1 3/4SM |
| | KMRN 051540Z AUTO 24004KT 1 3/4SM RA SCT001 BKN018 OVC024 06/06 A2999 RMK AO2 P0002 |
| 10:20 EST |  Overcast Drizzle | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | SSW 7 kph (SSW 4.6 mph) | - | 2SM |
| | KMRN 051520Z AUTO 24004KT 2SM DZ SCT001 OVC022 05/05 A2998 RMK AO2 |
| 10:00 EST |  Overcast Fog And Mist | 6°C / 43°F | 6°C / 43°F | 100% | 1015 mb (29.97 in) | Calm | - | 2 1/2SM |
| | KMRN 051500Z AUTO 00000KT 2 1/2SM BR OVC020 06/06 A2997 RMK AO2 |
| 09:40 EST |  Overcast Fog And Mist | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | Calm | - | 2SM |
| | KMRN 051440Z AUTO 00000KT 2SM BR SCT001 OVC020 05/05 A2997 RMK AO2 |
| 09:20 EST |  Overcast Fog And Mist | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | W 6 kph (W 3.5 mph) | - | 3SM |
| | KMRN 051420Z AUTO 27003KT 3SM BR OVC020 05/05 A2996 RMK AO2 |
| 09:00 EST |  Overcast Drizzle | 5°C / 41°F | 5°C / 41°F | 100% | 1014 mb (29.94 in) | Calm | - | 2SM |
| | KMRN 051400Z AUTO 00000KT 2SM -DZ SCT001 OVC020 05/05 A2995 RMK AO2 |
| 08:40 EST |  Overcast Fog And Mist | 5°C / 41°F | 5°C / 41°F | 100% | 1014 mb (29.94 in) | Calm | - | 1 3/4SM |
| | KMRN 051340Z AUTO 00000KT 1 3/4SM BR SCT001 OVC020 05/05 A2995 RMK AO2 |
| 08:20 EST |  Overcast Fog And Mist | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | Calm | - | 1 3/4SM |
| | KMRN 051320Z AUTO 00000KT 1 3/4SM BR OVC020 05/05 A2996 RMK AO2 |
| 08:00 EST |  Overcast Light Snow | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | NNW 6 kph (NNW 3.5 mph) | - | 1 3/4SM |
| | KMRN 051300Z AUTO 33003KT 1 3/4SM -SN OVC018 05/05 A2997 RMK AO2 |
| 07:40 EST |  Overcast Fog And Mist | 5°C / 41°F | 5°C / 41°F | 100% | 1015 mb (29.97 in) | NNW 6 kph (NNW 3.5 mph) | 0.25 mm (0.01 in) | 2 1/2SM |
| | KMRN 051240Z AUTO 33003KT 2 1/2SM BR OVC016 05/05 A2998 RMK AO2 P0001 |
| 07:20 EST |  Overcast Light Snow | 4°C / 39°F | 4°C / 39°F | 100% | 1016 mb (30 in) | Calm | - | 2 1/2SM |
| | KMRN 051220Z AUTO 00000KT 2 1/2SM -SN OVC016 04/04 A3000 RMK AO2 |
| 07:00 EST |  Overcast Light Snow | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | Calm | - | 2 1/2SM |
| | KMRN 051200Z AUTO 00000KT 2 1/2SM -SN OVC014 05/04 A2999 RMK AO2 |
| 06:40 EST |  Overcast Light Snow | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | NW 6 kph (NW 3.5 mph) | 0.51 mm (0.02 in) | 3SM |
| | KMRN 051140Z AUTO 32003KT 3SM -SN OVC014 05/04 A3000 RMK AO2 P0002 |
| 06:20 EST |  Overcast Light Snow | 5°C / 41°F | 4°C / 39°F | 93% | 1015 mb (29.97 in) | Calm | 0.25 mm (0.01 in) | 2 1/2SM |
| | KMRN 051120Z AUTO 00000KT 2 1/2SM -SN OVC014 05/04 A2998 RMK AO2 P0001 |
| 06:00 EST |  Overcast Light Snow | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | NNW 6 kph (NNW 3.5 mph) | - | 2 1/2SM |
| | KMRN 051100Z AUTO 33003KT 2 1/2SM -SN OVC014 05/04 A3000 RMK AO2 |
| 05:40 EST |  Overcast Light Rain | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | N 6 kph (N 3.5 mph) | 0.51 mm (0.02 in) | 3SM |
| | KMRN 051040Z AUTO 36003KT 3SM -RA OVC014 05/04 A3000 RMK AO2 P0002 |
| 05:20 EST |  Overcast Rain | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | N 6 kph (N 3.5 mph) | - | 5SM |
| | KMRN 051020Z AUTO 01003KT 5SM RA OVC014 05/04 A3000 RMK AO2 |
| 05:00 EST |  Overcast Drizzle | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | NNE 7 kph (NNE 4.6 mph) | - | 5SM |
| | KMRN 051000Z AUTO 02004KT 5SM DZ BKN016 OVC022 05/04 A2999 RMK AO2 |
| 04:40 EST |  Overcast Rain | 5°C / 41°F | 4°C / 39°F | 93% | 1016 mb (30 in) | Calm | 0.25 mm (0.01 in) | 5SM |
| | KMRN 050940Z AUTO 00000KT 5SM RA SCT015 OVC021 05/04 A3000 RMK AO2 P0001 |
| 04:21 EST |  Overcast Light Rain | 5°C / 41°F | 3°C / 37°F | 87% | 1016 mb (30 in) | N 7 kph (N 4.6 mph) | - | 5SM |
| | KMRN 050921Z AUTO 01004KT 5SM -RA BKN015 OVC021 05/03 A3000 RMK AO2 |
| 04:00 EST |  Overcast Light Rain | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | NNW 6 kph (NNW 3.5 mph) | - | 7SM |
| | KMRN 050900Z AUTO 34003KT 7SM -RA BKN023 OVC028 06/03 A3002 RMK AO2 |
| 03:40 EST |  Overcast Light Rain | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KMRN 050840Z AUTO 00000KT 10SM -RA SCT021 OVC030 06/03 A3002 RMK AO2 |
| 03:21 EST |  Overcast Light Rain | 6°C / 43°F | 3°C / 37°F | 81% | 1016 mb (30 in) | Calm | - | 10SM |
| | KMRN 050821Z AUTO 00000KT 10SM -RA BKN030 OVC037 06/03 A3001 RMK AO2 |
| 03:00 EST |  Overcast | 6°C / 43°F | 2°C / 36°F | 76% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KMRN 050800Z AUTO 00000KT 10SM OVC030 06/02 A3004 RMK AO2 |
| 02:40 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KMRN 050740Z AUTO 00000KT 10SM OVC030 06/03 A3002 RMK AO2 |
| 02:20 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KMRN 050720Z AUTO 34003KT 10SM OVC030 06/03 A3003 RMK AO2 |
| 02:00 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | NW 6 kph (NW 3.5 mph) | - | 10SM |
| | KMRN 050700Z AUTO 30003KT 10SM OVC030 06/03 A3004 RMK AO2 |
| 01:40 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KMRN 050640Z AUTO 00000KT 10SM SCT030 OVC038 06/03 A3004 RMK AO2 |
| 01:20 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KMRN 050620Z AUTO 00000KT 10SM BKN032 OVC038 06/03 A3006 RMK AO2 |
| 01:00 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KMRN 050600Z AUTO 00000KT 10SM SCT030 OVC038 06/03 A3007 RMK AO2 |
| 00:40 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KMRN 050540Z AUTO 00000KT 10SM OVC038 06/03 A3005 RMK AO2 |
| 00:20 EST |  Overcast | 6°C / 43°F | 3°C / 37°F | 81% | 1018 mb (30.06 in) | NNW 6 kph (NNW 3.5 mph) | - | 10SM |
| | KMRN 050520Z AUTO 33003KT 10SM OVC038 06/03 A3007 RMK AO2 |
| 00:00 EST |  Overcast | 6°C / 43°F | 2°C / 36°F | 76% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KMRN 050500Z AUTO 00000KT 10SM OVC038 06/02 A3008 RMK AO2 |