Weather alerts in Maryland, May 2009

76 weather alerts in May 2009, 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 May 2009. Tap one for its archive.

Alerts: 76
Warnings: 37
Watches: 15
Advisories: 14
Busiest day: May 29, 200921 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
May 1, 1:03 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 7 more	117 min
May 4, 3:10 AM EDT	Flood Watch	PBZ		16 hr
May 4, 8:32 AM EDT	Areal Flood Warning	PBZ	Garrett	12 hr
May 4, 8:51 AM EDT	Flood Watch	LWX	Allegany, Washington	4 hr
May 4, 11:05 AM EDT	Areal Flood Warning	LWX	Allegany	6 hr
May 4, 2:29 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	46 min
May 4, 10:00 PM EDT	River Flood Warning	LWX	Allegany	8 hr
May 5, 3:54 AM EDT	River Flood Warning	LWX	Allegany	14 hr
May 5, 2:17 PM EDT	River Flood Warning	LWX	Frederick	26 hr
May 5, 3:23 PM EDT	Flood Watch	LWX	Allegany, Frederick, Washington	37 hr
May 5, 3:26 PM EDT	Flood Watch	PBZ		30 hr
May 6, 3:11 PM EDT	Coastal Flood Advisory	LWX	Prince George's	7 hr
May 6, 8:26 PM EDT	Tornado Watch	SPC	Calvert, Dorchester, Saint Mary's, Somerset, Wicomico, Worcester	8 hr
May 6, 10:50 PM EDT	Mesoscale Discussion	SPC	Dorchester, Saint Mary's, Somerset	55 min
May 6, 11:03 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico	24 min
May 7, 12:10 AM EDT	Mesoscale Discussion	SPC	Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 6 more	95 min
May 7, 12:14 AM EDT	Areal Flood Warning	LWX	Anne Arundel	4 hr
May 7, 12:28 AM EDT	Areal Flood Warning	LWX	City of Baltimore	4 hr
May 7, 1:01 AM EDT	Flash Flood Warning	LWX	Baltimore	3 hr
May 7, 1:32 AM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
May 7, 8:36 AM EDT	Coastal Flood Advisory	LWX	Prince George's	3 hr
May 7, 1:13 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	43 min
May 7, 1:22 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent	4 hr
May 7, 7:03 PM EDT	Coastal Flood Advisory	LWX	Prince George's	4 hr
May 8, 3:42 AM EDT	Coastal Flood Advisory	LWX	Prince George's	8 hr
May 8, 2:21 PM EDT	Flood Watch	PBZ		8 hr
May 8, 5:35 PM EDT	Flash Flood Watch	LWX	Allegany, Washington	7 hr
May 9, 3:16 AM EDT	Wind Advisory	PBZ		17 hr
May 9, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	Saint Mary's	8 hr
May 9, 5:58 PM EDT	Mesoscale Discussion	SPC	Caroline, Dorchester, Saint Mary's, Somerset, Talbot, Wicomico and 1 more	62 min
May 9, 6:25 PM EDT	Severe Thunderstorm Watch	SPC	Calvert, Caroline, Dorchester, Somerset, Talbot, Wicomico and 1 more	4 hr
May 9, 6:41 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Wicomico	49 min
May 9, 7:20 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	55 min
May 12, 3:08 PM EDT	Frost Advisory	LWX	Allegany	17 hr
May 15, 3:12 AM EDT	Dense Fog Advisory	LWX	Allegany, Baltimore, Carroll, Frederick, Washington	6 hr
May 16, 12:05 PM EDT	Mesoscale Discussion	SPC	Allegany, Garrett	55 min
May 16, 2:36 PM EDT	Mesoscale Discussion	SPC	Baltimore, Carroll, Frederick, Howard, Montgomery, Prince George's and 1 more	24 min
May 16, 3:27 PM EDT	Freeze Watch	LWX	Allegany	12 hr
May 17, 3:18 AM EDT	Frost Advisory	LWX	Allegany, Washington	30 hr
May 17, 3:18 AM EDT	Freeze Warning	LWX	Allegany	18 hr
May 18, 3:53 AM EDT	Frost Advisory	LWX	Allegany, Baltimore, Carroll, Frederick, Washington	28 hr
May 18, 3:53 AM EDT	Freeze Warning	LWX	Allegany	28 hr
May 19, 3:04 PM EDT	Frost Advisory	LWX	Allegany	17 hr
May 23, 5:34 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	26 min
May 23, 5:48 PM EDT	Flash Flood Warning	LWX	Allegany	2 hr
May 25, 3:43 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	47 min
May 26, 7:15 AM EDT	Flash Flood Warning	LWX	Howard, Montgomery, Prince George's	4 hr
May 26, 7:27 AM EDT	Flash Flood Warning	LWX	Howard, Montgomery, Prince George's	4 hr
May 26, 9:36 AM EDT	River Flood Warning	LWX	Montgomery	6 hr
May 26, 11:38 AM EDT	Flood Watch	LWX	Anne Arundel, Prince George's	7 hr
May 26, 4:22 PM EDT	Coastal Flood Advisory	AKQ	Worcester	10 hr
May 28, 2:51 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	39 min
May 28, 4:54 PM EDT	Mesoscale Discussion	SPC	Garrett	66 min
May 28, 4:55 PM EDT	Flash Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 3 more	7 hr
May 28, 8:43 PM EDT	Areal Flood Advisory	PBZ	Garrett	3 hr
May 29, 12:14 AM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Carroll, Charles, Frederick, Prince George's and 1 more	4 hr
May 29, 12:40 AM EDT	Flash Flood Warning	LWX	Montgomery	69 min
May 29, 4:22 AM EDT	Flash Flood Watch	LWX	Anne Arundel, Baltimore, Carroll, Frederick, Prince George's, City of Baltimore	15 hr
May 29, 12:20 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more	55 min
May 29, 1:06 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	24 min
May 29, 1:26 PM EDT	Severe Thunderstorm Watch	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more	8 hr
May 29, 2:24 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore	51 min
May 29, 3:15 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	27 min
May 29, 3:22 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	68 min
May 29, 4:30 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more	60 min
May 29, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	50 min
May 29, 5:21 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	39 min
May 29, 5:32 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	58 min
May 29, 5:39 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	40 min
May 29, 5:47 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	10 min
May 29, 5:52 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	31 min
May 29, 6:20 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Cecil, Charles and 12 more	55 min
May 29, 7:18 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico	42 min
May 29, 7:41 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	49 min
May 29, 7:51 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	54 min
May 29, 8:06 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	24 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	22
Severe Thunderstorm Watch	3
Tornado Watch	1
Mesoscale Discussion	10
Flooding
Areal Flood Warning	4
Flash Flood Warning	5
River Flood Warning	4
Flash Flood Watch	4
Flood Watch	6
Areal Flood Advisory	3
Cold
Freeze Warning	2
Freeze Watch	1
Frost Advisory	4
Wind and dust
Wind Advisory	1
Fog and smoke
Dense Fog Advisory	1
Coast and beach
Coastal Flood Advisory	5

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 2008 2010

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.