Alert archive / Maryland / Tornado Warnings in 2025

Tornado Warning 30, NWS Baltimore/Washington

July 1, 2025Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this tornado warning at Jul 1, 2025, 7:45 PM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 1, 2025, 7:45 PM EDT (23:45 UTC)
Expired: Jul 1, 2025, 8:02 PM EDT
In force: 17 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Calvert County, MD, Saint Mary's County, MD

The radar

The Sterling radar (KLWX), 107 km from the middle of the area, began a volume at 23:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.8 hours before the alert went out and 99 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 822 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this tornado warning went out at Jul 1, 3:12 PM EDT, 4 hours 33 minutes earlier.

Area forecast discussion, Jul 1, 3:12 PM EDT, 4 hours 33 minutes before

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
312 PM EDT Tue Jul 1 2025

.SYNOPSIS...

An upper trough and associated cold front will move through the
area later tonight into tomorrow. High pressure will build over
the area later this week into the weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...

Multiple lines of showers and thundestorms are currently ongoing
at this time. Radar trends and simulated satellite imagery from
various models indicate lines may merge across central and
northeast MD posing a significant flash flooding threat into the
evening. New 12Z ECMWF AIFS Ensembles and its ensemble mean
show potential for significant rainfall totals along the US-29
corridor and I-95 from Washington DC to Wilmington DE. Severe
threat should start diminishing after 00Z, but flooding may
still be ongoing after 00Z. Peak rainfall rates should start
diminishing after 00Z tonight as instability is exhausted, but
light rain will continue well through the night on the cool
side of the sfc boundary. A rainy night is expected for most
tonight.

&&

.SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...

Showers are still likely to be ongoing south of I-70 at 12Z Wed,
but should start progressing southward more rapidly through the
day and should have mostly exited the fcst area by 18Z, except
perhaps the southern tip of St. Mary's County. After that, dry
air will filter in.

A reinforcing shortwave-trough will move across the area Thu
afternoon bringing a threat of showers or thunderstorms across
areas west of I-81. Dry Thu night into Fri just in time for the
Fourth of July.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...

Dry conditions and seasonable temperatures continue Friday
through Sunday. Heat and humidity returns Sunday night and
Monday and so does the shower and thunderstorm chances through
this period. A trough of low pressure will be the focal point of
any convection Sunday night and Monday morning. A cold front
that follows the trough will be the focal point of convection
Monday afternoon and evening. Highs Friday through Sunday will
be in the middle to upper 80s. Highs Monday should reach near 90
or the lower 90s.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...

Widespread thunderstorms expected through 01Z, but showers could linger
well into the overnight. Brief IFR/LIFR conditions are likely. Windshift
is not expected until after 00Z.

VFR conditions at all terminals Friday through Saturday night. Winds
northwest around 5 knots becoming light and variable Friday into
Friday night. Winds light becoming southeast 5 knots Saturday and
Saturday night.

&&

.MARINE...

SCA conditions are possible across the middle and lower bay and
south of Cobb Island. In addition, numerous thunderstorms are
expected which may produce strong wind gusts in excess of 34 kt.
SMWs may be required. Winds are expected to diminish Wed
morning.

No marine hazards Friday through Saturday night. Winds northwest 5
to 10 knots Friday and Friday night. Winds becoming southeast 5 to
10 knots Saturday and Saturday night.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...Flood Watch until 11 PM EDT this evening for DCZ001.
MD...Flood Watch until 11 PM EDT this evening for MDZ003>006-008-
     011-013-014-503>508.
VA...Flood Watch until 11 PM EDT this evening for VAZ026>031-
     038>040-051-053-054-501-502-505>507-526-527.
WV...Flood Watch until 11 PM EDT this evening for WVZ050>053-055.
MARINE...Flood Watch until 11 PM EDT this evening for ANZ530.
     Small Craft Advisory until 9 PM EDT this evening for ANZ532-
     533-540>542.
     Small Craft Advisory until 6 AM EDT Wednesday for ANZ534-537-
     543.

&&

SYNOPSIS...LFR
NEAR TERM...LFR
SHORT TERM...LFR
LONG TERM...KLW
AVIATION...LFR/KLW
MARINE...LFR/KLW

Hazardous weather outlook, Jul 1, 7:44 PM EDT, 1 minute before

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In the hours before

Local storm report, Jul 1, 7:21 PM EDT, 24 minutes before

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Local storm report, Jul 1, 7:27 PM EDT, 18 minutes before

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Local storm report, Jul 1, 7:28 PM EDT, 17 minutes before

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Local storm report, Jul 1, 7:35 PM EDT, 10 minutes before

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Local storm report, Jul 1, 7:36 PM EDT, 9 minutes before

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Local storm report, Jul 1, 7:40 PM EDT, 5 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 8:02 PM EDT	Special Marine Warning	LWX		88 min
Jul 1, 2:44 AM EDT	Flood Watch	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 16 more	17 hr
Jul 1, 11:54 AM EDT	Small Craft Advisory	LWX		18 hr
Jul 1, 12:41 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Rappahannock	34 min
Jul 1, 12:52 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Madison	38 min
Jul 1, 1:22 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Shenandoah, Warren, City of Winchester	38 min
Jul 1, 1:24 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	51 min
Jul 1, 1:27 PM EDT	Severe Thunderstorm Warning	LWX	Page, Rappahannock, Shenandoah, Warren	48 min
Jul 1, 1:44 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Prince William, Stafford	46 min
Jul 1, 1:55 PM EDT	Special Marine Warning	LWX		2 hr
Jul 1, 2:21 PM EDT	Special Marine Warning	LWX		84 min
Jul 1, 2:38 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, Loudoun, Prince William, City of Alexandria, City of Fairfax and 3 more	52 min
Jul 1, 2:38 PM EDT	Severe Thunderstorm Warning	LWX	Page, Rockingham, Shenandoah, Warren	52 min
Jul 1, 2:47 PM EDT	Flash Flood Warning	LWX	Madison, Page, Rappahannock, Shenandoah, Warren	3 hr
Jul 1, 2:54 PM EDT	Flash Flood Warning	LWX	Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church	2 hr
Jul 1, 3:11 PM EDT	Flash Flood Warning	LWX	Page, Rockingham, Shenandoah	3 hr
Jul 1, 3:18 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, City of Alexandria	57 min
Jul 1, 3:45 PM EDT	Special Marine Warning	LWX		60 min
Jul 1, 3:49 PM EDT	Special Marine Warning	LWX		116 min
Jul 1, 4:15 PM EDT	Special Marine Warning	LWX		60 min
Jul 1, 4:16 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Greene, Rockingham, City of Staunton	29 min
Jul 1, 4:19 PM EDT	Flash Flood Warning	LWX	Greene, Madison, Page, Rappahannock, Rockingham	2 hr
Jul 1, 4:38 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Greene, Madison	52 min
Jul 1, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Greene, Madison, Page, Rockingham	15 min
Jul 1, 4:54 PM EDT	Flash Flood Warning	LWX	Albemarle, Culpeper, Greene, Madison, Rappahannock, Rockingham	89 min
Jul 1, 5:19 PM EDT	Areal Flood Warning	LWX	Fairfax, City of Fairfax	76 min
Jul 1, 5:53 PM EDT	Severe Thunderstorm Warning	LWX	Orange, Spotsylvania	37 min
Jul 1, 5:55 PM EDT	Special Marine Warning	LWX		65 min
Jul 1, 5:58 PM EDT	Special Marine Warning	LWX		92 min
Jul 1, 6:07 PM EDT	Areal Flood Warning	LWX	Rockingham, Shenandoah	4 hr
Jul 1, 6:23 PM EDT	Areal Flood Warning	LWX	Albemarle, Culpeper, Greene, Madison, Rappahannock, Rockingham	97 min
Jul 1, 6:27 PM EDT	Areal Flood Warning	LWX	Greene, Madison, Page, Rockingham	3 hr
Jul 1, 6:44 PM EDT	Severe Thunderstorm Warning	LWX	King George	46 min
Jul 1, 6:49 PM EDT	Special Marine Warning	LWX		116 min
Jul 1, 6:51 PM EDT	Special Marine Warning	LWX		114 min
Jul 1, 7:27 PM EDT	Special Marine Warning	LWX		93 min
Jun 30, 8:14 PM EDT	Tornado Warning	LWX	Harford	31 min
Jun 30, 8:39 PM EDT	Flash Flood Warning	LWX	Harford	52 min
Jun 30, 9:30 PM EDT	Areal Flood Warning	LWX	Baltimore, Harford	75 min
Jun 30, 9:31 PM EDT	Areal Flood Warning	LWX	Harford	4 hr
Jul 1, 2:29 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	31 min
Jul 1, 3:15 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard, Montgomery, City of Baltimore	45 min
Jul 1, 4:02 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, Howard, City of Baltimore	28 min
Jul 1, 4:10 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	35 min
Jul 1, 4:31 PM EDT	Flash Flood Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	3 hr
Jul 1, 4:53 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	33 min
Jul 1, 6:04 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	41 min
Jul 1, 7:23 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	49 min

Nearby

Tornado Warnings in Maryland, 2025 Every tornado warning in 2025 Tornadoes in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.