Weather alerts in Maryland, December 2018

76 weather alerts in December 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in December 2018. Tap one for its archive.

Alerts: 76
Warnings: 29
Watches: 21
Advisories: 24
Busiest day: December 15, 201815 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

The alerts

Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Counties	Lasted
Dec 1, 2:28 PM EST	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Calvert, Charles, Harford, Saint Mary's and 1 more	36 hr
Dec 2, 12:57 AM EST	Special Weather Statement	PBZ	Garrett	33 min
Dec 2, 5:04 AM EST	Coastal Flood Advisory	AKQ	Dorchester	8 hr
Dec 2, 8:24 AM EST	Dense Fog Advisory	LWX	Anne Arundel, Baltimore, Calvert, Charles, Harford, Howard and 4 more	5 hr
Dec 2, 8:24 AM EST	Dense Fog Advisory	PHI	Cecil, Kent, Queen Anne's, Talbot	21 hr
Dec 2, 3:51 PM EST	Coastal Flood Advisory	AKQ	Dorchester	8 hr
Dec 2, 6:32 PM EST	Dense Fog Advisory	LWX	Allegany, Baltimore, Carroll, Frederick, Harford, Howard and 3 more	11 hr
Dec 5, 2:25 PM EST	Winter Weather Advisory	PBZ		11 hr
Dec 8, 2:50 PM EST	Winter Weather Advisory	AKQ	Dorchester, Somerset, Wicomico	37 hr
Dec 8, 6:02 PM EST	Winter Storm Warning	LWX	Saint Mary's	30 hr
Dec 8, 6:02 PM EST	Winter Weather Advisory	LWX	Calvert, Charles, Saint Mary's	30 hr
Dec 13, 2:04 PM EST	Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more	63 hr
Dec 14, 5:39 AM EST	Dense Fog Advisory	AKQ	Dorchester, Somerset, Wicomico, Worcester	3 hr
Dec 14, 7:30 AM EST	Dense Fog Advisory	LWX	Anne Arundel, Baltimore, Calvert, Carroll, Harford, Howard and 2 more	6 hr
Dec 14, 7:44 AM EST	Dense Fog Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	3 hr
Dec 15, 9:44 AM EST	River Flood Watch	LWX	Washington	6 hr
Dec 15, 9:47 AM EST	River Flood Watch	LWX	Frederick	6 hr
Dec 15, 9:49 AM EST	River Flood Watch	LWX	Montgomery	6 hr
Dec 15, 11:07 AM EST	Areal Flood Warning	LWX	Allegany	9 hr
Dec 15, 11:30 AM EST	River Flood Warning	LWX	Allegany	11 hr
Dec 15, 11:50 AM EST	Areal Flood Advisory	PBZ	Garrett	6 hr
Dec 15, 1:31 PM EST	Winter Weather Advisory	LWX	Allegany	27 hr
Dec 15, 3:01 PM EST	River Flood Warning	LWX	Allegany	30 hr
Dec 15, 3:03 PM EST	River Flood Warning	LWX	Washington	61 hr
Dec 15, 3:09 PM EST	River Flood Watch	LWX	Washington	63 hr
Dec 15, 3:13 PM EST	River Flood Warning	LWX	Frederick	63 hr
Dec 15, 3:15 PM EST	River Flood Warning	LWX	Montgomery	3 days
Dec 15, 3:17 PM EST	River Flood Watch	LWX	Montgomery	24 hr
Dec 15, 3:25 PM EST	River Flood Warning	LWX	Montgomery	23 hr
Dec 15, 4:34 PM EST	Areal Flood Warning	LWX	Montgomery, Prince George's	25 hr
Dec 15, 9:29 PM EST	Areal Flood Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, City of Baltimore	15 hr
Dec 15, 9:42 PM EST	River Flood Watch	LWX	Washington	24 hr
Dec 16, 1:33 AM EST	Areal Flood Warning	LWX	Carroll, Frederick	4 hr
Dec 16, 1:37 AM EST	Areal Flood Warning	LWX	Prince George's	33 hr
Dec 16, 3:04 AM EST	Areal Flood Warning	LWX	Baltimore	8 hr
Dec 16, 3:20 AM EST	River Flood Warning	LWX	Washington	38 hr
Dec 16, 3:21 AM EST	River Flood Warning	LWX	Montgomery	65 hr
Dec 16, 3:21 AM EST	River Flood Warning	LWX	Frederick	24 hr
Dec 16, 12:13 PM EST	Areal Flood Warning	LWX	Baltimore, Howard	3 hr
Dec 16, 12:28 PM EST	Areal Flood Advisory	PHI	Cecil	4 hr
Dec 16, 3:41 PM EST	Areal Flood Warning	PHI	Cecil	4 hr
Dec 18, 3:16 PM EST	Flood Watch	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	3 days
Dec 19, 3:48 AM EST	Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more	59 hr
Dec 20, 1:38 PM EST	Coastal Flood Watch	LWX	Anne Arundel, Saint Mary's	24 hr
Dec 20, 5:05 PM EST	River Flood Watch	LWX	Washington	11 hr
Dec 20, 5:08 PM EST	River Flood Watch	LWX	Washington	24 hr
Dec 20, 5:11 PM EST	River Flood Watch	LWX	Washington	24 hr
Dec 20, 5:13 PM EST	River Flood Watch	LWX	Frederick	24 hr
Dec 20, 5:16 PM EST	River Flood Watch	LWX	Montgomery	24 hr
Dec 20, 5:18 PM EST	River Flood Watch	LWX	Montgomery	24 hr
Dec 20, 5:32 PM EST	River Flood Warning	LWX	Allegany	11 hr
Dec 20, 5:35 PM EST	River Flood Watch	LWX	Washington	17 hr
Dec 20, 5:41 PM EST	River Flood Watch	LWX	Montgomery	11 hr
Dec 20, 5:46 PM EST	River Flood Watch	LWX	Frederick	16 hr
Dec 20, 6:00 PM EST	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Calvert, Charles, Harford, City of Baltimore	39 hr
Dec 21, 2:17 AM EST	Coastal Flood Warning	LWX	Anne Arundel, Saint Mary's	25 hr
Dec 21, 3:37 AM EST	Areal Flood Warning	LWX	Baltimore, Harford	5 hr
Dec 21, 4:02 AM EST	Areal Flood Warning	PHI	Cecil	4 hr
Dec 21, 4:36 AM EST	Coastal Flood Advisory	AKQ	Dorchester, Somerset, Wicomico	21 hr
Dec 21, 4:43 AM EST	Areal Flood Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	8 hr
Dec 21, 8:04 AM EST	Areal Flood Warning	PHI	Cecil	7 hr
Dec 21, 1:18 PM EST	Winter Weather Advisory	PBZ		24 hr
Dec 21, 1:48 PM EST	Coastal Flood Advisory	LWX	Anne Arundel, Saint Mary's	13 hr
Dec 21, 3:14 PM EST	High Surf Advisory	AKQ	Worcester	10 hr
Dec 21, 3:51 PM EST	Severe Thunderstorm Warning	LWX	Howard, Montgomery	24 min
Dec 21, 4:16 PM EST	Mesoscale Discussion	SPC	Carroll, Frederick, Howard, Montgomery, Washington	59 min
Dec 21, 4:29 PM EST	Severe Thunderstorm Warning	LWX	Montgomery	46 min
Dec 21, 4:45 PM EST	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	45 min
Dec 21, 5:01 PM EST	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard	29 min
Dec 22, 2:19 PM EST	River Flood Warning	LWX	Montgomery	38 hr
Dec 23, 2:22 PM EST	Winter Weather Advisory	PBZ		15 hr
Dec 27, 3:41 AM EST	Flood Watch	LWX	Anne Arundel, Baltimore, Harford, Howard, Montgomery, Prince George's and 1 more	39 hr
Dec 27, 3:13 PM EST	Flood Watch	PHI	Cecil, Kent	28 hr
Dec 28, 3:04 PM EST	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	4 hr
Dec 28, 7:45 PM EST	Dense Fog Advisory	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more	11 hr
Dec 28, 8:57 PM EST	Dense Fog Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	9 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	4
Mesoscale Discussion	1
Special Weather Statement	1
Flooding
Areal Flood Warning	12
River Flood Warning	11
Flood Watch	5
River Flood Watch	15
Areal Flood Advisory	3
Winter
Winter Storm Warning	1
Winter Weather Advisory	6
Fog and smoke
Dense Fog Advisory	8
Coast and beach
Coastal Flood Warning	1
Coastal Flood Watch	1
Coastal Flood Advisory	6
High Surf Advisory	1

By county

Every county with at least one alert. A county page lists each alert that covered it.

Nearby

Alerts in force now Tornadoes on record The radar archive 2017 2019

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.