Alert archive / Maryland / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 59, NWS Baltimore/Washington

June 5, 20167 counties in Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 5, 2016, 4:22 PM EDT for 7 counties in Maryland. It was in force for 53 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: Jun 5, 2016, 4:22 PM EDT (20:22 UTC)
Expired: Jun 5, 2016, 5:15 PM EDT
In force: 53 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Anne Arundel County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Harford County, MD, Howard County, MD, Montgomery County, MD

The radar

The Sterling radar (KLWX), 74 km from the middle of the area, began a volume at 20:26 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
Jun 5, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.4 hours before the alert went out and 69 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: 60 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 5, 1:55 PM EDT, 2 hours 27 minutes earlier.

Area forecast discussion, Jun 5, 1:55 PM EDT, 2 hours 27 minutes before

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
155 PM EDT SUN JUN 5 2016

.SYNOPSIS...

A cold front will cross the region from the west this afternoon
and evening. An upper level trough will build overhead Monday
through Wednesday before surface high pressure builds into the
region for the latter half of this week.

&&

.NEAR TERM /THROUGH TONIGHT/...

We are currently watching the line of showers coming into western
MD. These a free of lightning at the moment but are starting to
gain some vertical development. A watch is certainly possible now
that breaks have finally developed in the low cloud which has been
hanging over the area all morning.

As written in earlier discussion parameters are in place for
severe development. Dulles VWP has a good wind field with SW winds
of 30-50 knots aloft.

HRRR still shows strongest activitity with the line would be in
the I-95 corridor around 21Z.

A flash flood watch remains in effect for the central Shenandoah
Valley of VA based partly on the fact that Albemarle/Nelson
received up to 7" of rain last night...and we are still receiving
reports of flooding in these counties as well as in Rockingham.

&&

.SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/...

Monday will be a big improvement over Sunday, with dewpoints about
10 degrees lower (near 60) and a decent amount of sunshine.
However, the 500 mb trough is nearby, and its axis approaching.
Therefore, can't rule out a late day shower, especially over the
mountains.

The cold front will impact humidity more that temperatures. Highs
Monday (and lows Monday night) will be similar to Sunday. A blend
was taken.

Tuesday night looking refreshingly cool with lows in the upper 50s
to lower 60s.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...

The combination of the tropical cyclone out over the open Atlantic
and low pressure over eastern Canada will draw cooler air, and high
pressure down over the Mid Atlantic for Wednesday and Thursday. By
late week, a ridge of high pressure begins to push up our way from
the southern states. At the same time, a weak stationary boundary
between the southern high, and high pressure to our north, is
expected over the region over the weekend.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...

VFR this afternoon outside of thunderstorms. The prime time for
thunderstorms activity today is 20 to 23Z.

VFR generally will prevail on Monday and beyond. Showers and
thunderstorms may affect terminals Tuesday or Wednesday...but
effects should be short-lived.

&&

An SCA posted by mid afternoon through much of the evening.
Thunrderstorms/SMW's will be a concern in the late afternoon.

SW winds continue through Monday night...mainly 10-15 kt.

Will need to watch northwest flow thru midweek with fronts passing
through for possible periods of SCA conditions...but certainty is
pretty low at this point.

&&

.TIDES/COASTAL FLOODING...

Although a cold front will cross the waters tonight, don't foreseewinds
shifting sufficiently for a big water evacuation. Therefore, we
will likely repeat this process late tonight into early Monday.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...None.
VA...Flash Flood Watch until 8 PM EDT this evening for VAZ025>027-
     029-036>038-507-508.
WV...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ530-
     531-535-536-538>540.
     Small Craft Advisory until 6 AM EDT Monday for ANZ532>534-537-
     541>543.

&&

PRODUCTS...WOODY!/CAS

Hazardous weather outlook, Jun 5, 3:17 PM EDT, 1 hour 5 minutes before

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In the hours before

Local storm report, Jun 5, 11:24 AM EDT, 4 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1124 AM EDT SUN JUN 05 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0739 PM     FLOOD            1 SSE DALE ENTERPRISE   38.44N  78.94W
06/04/2016                   ROCKINGHAM         VA   BROADCAST MEDIA

            SILVER LAKE ROAD FLOODED AND CLOSED AT COOKS CREEK DUE
            TO WATER FLOWING OVER THE ROAD.

&&

EVENT NUMBER LWX1603932

JE

Local storm report, Jun 5, 11:32 AM EDT, 4 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1132 AM EDT SUN JUN 05 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0503 PM     FLOOD            2 WSW CLOVER HILL       38.45N  79.06W
06/04/2016                   ROCKINGHAM         VA   PUBLIC

            WAGGYS CREEK WAS OUT OF ITS BANKS AND COVERING DANIEL
            CUPP ROAD MAKING IT IMPASSIBLE.

&&

EVENT NUMBER LWX1603933

JE

Local storm report, Jun 5, 3:08 PM EDT, 1 hour 14 minutes before

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Local storm report, Jun 5, 3:26 PM EDT, 56 minutes before

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Local storm report, Jun 5, 4:07 PM EDT, 15 minutes before

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Local storm report, Jun 5, 4:20 PM EDT, 2 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 4, 9:33 PM EDT	Coastal Flood Advisory	LWX	Arlington, City of Alexandria, City of Falls Church	13 hr
Jun 4, 9:35 PM EDT	Flash Flood Warning	LWX	Albemarle, Nelson	5 hr
Jun 4, 10:16 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson, City of Charlottesville	44 min
Jun 4, 11:38 PM EDT	Areal Flood Warning	LWX	Page, Rockingham, Shenandoah, City of Harrisonburg	13 hr
Jun 5, 2:32 AM EDT	Areal Flood Warning	LWX	Albemarle, Nelson	9 hr
Jun 5, 10:08 AM EDT	Flash Flood Watch	LWX	Albemarle, Amherst, Augusta, Greene, Madison, Nelson and 10 more	8 hr
Jun 5, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Loudoun	53 min
Jun 5, 3:58 PM EDT	Special Marine Warning	LWX		92 min
Jun 5, 4:15 PM EDT	Special Marine Warning	LWX		90 min
Jun 5, 4:30 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson	45 min
Jun 5, 5:15 PM EDT	Special Marine Warning	LWX		90 min
Jun 5, 5:23 PM EDT	Special Marine Warning	LWX		97 min
Jun 5, 6:19 PM EDT	Special Marine Warning	LWX		86 min
Jun 5, 7:22 PM EDT	Special Marine Warning	LWX		53 min
Jun 5, 3:13 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Washington	48 min
Jun 5, 3:52 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more	38 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2016 Every severe thunderstorm warning in 2016

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.