Weather alerts in Maryland, April 2021

44 weather alerts in April 2021, 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 April 2021. Tap one for its archive.

Alerts: 44
Warnings: 20
Watches: 5
Advisories: 10
Busiest day: April 21, 202110 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
Apr 1, 2:53 AM EDT	Special Weather Statement	AKQ	Somerset, Wicomico, Worcester	37 min
Apr 1, 3:14 AM EDT	Freeze Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	30 hr
Apr 2, 8:46 AM EDT	Freeze Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	24 hr
Apr 11, 4:54 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Carroll, Charles, Frederick, Harford and 5 more	2 hr
Apr 11, 7:43 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard	25 min
Apr 11, 9:01 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	44 min
Apr 11, 9:13 PM EDT	Special Weather Statement	PHI	Kent	32 min
Apr 11, 9:16 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	44 min
Apr 11, 10:03 PM EDT	Areal Flood Warning	LWX	Cecil, Harford	2 hr
Apr 11, 10:18 PM EDT	Areal Flood Warning	LWX	Cecil, Harford	2 hr
Apr 12, 2:54 PM EDT	Coastal Flood Advisory	AKQ	Dorchester, Somerset, Wicomico	14 hr
Apr 12, 9:38 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Charles, Harford, Saint Mary's, City of Baltimore	14 hr
Apr 13, 3:44 PM EDT	Coastal Flood Advisory	AKQ	Dorchester, Somerset, Wicomico	14 hr
Apr 13, 9:05 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Harford, Saint Mary's, City of Baltimore	15 hr
Apr 21, 4:08 AM EDT	Freeze Warning	LWX	Baltimore, Carroll, Frederick, Harford, Washington	29 hr
Apr 21, 12:22 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 10 more	113 min
Apr 21, 12:28 PM EDT	Severe Thunderstorm Watch	SPC	Anne Arundel, Calvert, Caroline, Cecil, Dorchester, Kent and 6 more	5 hr
Apr 21, 12:43 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	33 min
Apr 21, 12:50 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	40 min
Apr 21, 1:09 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	30 min
Apr 21, 1:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	37 min
Apr 21, 1:57 PM EDT	Special Weather Statement	AKQ	Somerset, Wicomico, Worcester	48 min
Apr 21, 2:19 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	41 min
Apr 21, 2:47 PM EDT	Wind Advisory	LWX	Anne Arundel, Calvert, Charles, Montgomery, Prince George's, Saint Mary's	5 hr
Apr 21, 9:06 PM EDT	Freeze Watch	LWX	Carroll, Frederick, Washington	15 hr
Apr 22, 12:03 PM EDT	Frost Advisory	LWX	Anne Arundel, Baltimore, Calvert, Cecil, Charles, Harford and 3 more	20 hr
Apr 22, 12:03 PM EDT	Freeze Warning	LWX	Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more	20 hr
Apr 22, 12:04 PM EDT	Frost Advisory	AKQ	Dorchester, Somerset, Wicomico, Worcester	20 hr
Apr 22, 2:31 PM EDT	Frost Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	17 hr
Apr 29, 3:32 AM EDT	High Wind Watch	PHI	Caroline, Kent, Queen Anne's, Talbot	16 hr
Apr 29, 3:59 AM EDT	High Wind Watch	LWX	Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more	16 hr
Apr 29, 2:32 PM EDT	Freeze Watch	LWX		22 hr
Apr 29, 2:37 PM EDT	Wind Advisory	AKQ	Dorchester, Somerset, Wicomico, Worcester	34 hr
Apr 29, 4:52 PM EDT	Mesoscale Discussion	SPC	Caroline, Cecil, Kent, Queen Anne's, Talbot	2 hr
Apr 29, 7:23 PM EDT	High Wind Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	26 hr
Apr 29, 8:18 PM EDT	High Wind Warning	LWX	Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 6 more	25 hr
Apr 29, 8:18 PM EDT	Wind Advisory	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 8 more	30 hr
Apr 30, 12:24 AM EDT	Special Weather Statement	AKQ	Dorchester, Somerset, Wicomico	66 min
Apr 30, 1:22 AM EDT	Special Weather Statement	AKQ	Somerset, Wicomico, Worcester	38 min
Apr 30, 2:13 AM EDT	Special Weather Statement	AKQ	Worcester	47 min
Apr 30, 12:29 PM EDT	Freeze Warning	LWX		21 hr
Apr 30, 4:31 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery, Washington	29 min
Apr 30, 4:39 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Charles, Howard, Montgomery, Prince George's	36 min
Apr 30, 5:11 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	34 min

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	11
Severe Thunderstorm Watch	1
Mesoscale Discussion	3
Special Weather Statement	6
Flooding
Areal Flood Warning	2
Cold
Freeze Warning	5
Freeze Watch	2
Frost Advisory	3
Wind and dust
High Wind Warning	2
High Wind Watch	2
Wind Advisory	3
Coast and beach
Coastal Flood Advisory	4

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 2020 2022

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.