Alert archive / Virginia / Areal Flood Warnings in 2017

Areal Flood Warning 9, NWS Blacksburg, VA

May 5, 2017Rockbridge County, City of Lexington, Virginia

NWS Blacksburg, VA issued this areal flood warning at May 5, 2017, 7:22 AM EDT for Rockbridge County, City of Lexington, Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 5, 2017, 7:22 AM EDT (11:22 UTC)
Expired: May 5, 2017, 1:15 PM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties City of Lexington, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 112 km from the middle of the area, began a volume at 11:25 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 nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 11.4 hours before the alert went out and 66 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: 5 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 347 m²/s²
0-3 km storm-relative helicity: 487 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 areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this areal flood warning went out at May 5, 5:13 AM EDT, 2 hours 9 minutes earlier.

Area forecast discussion, May 5, 5:13 AM EDT, 2 hours 9 minutes before

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Hazardous weather outlook, May 5, 6:53 AM EDT, 29 minutes before

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In the hours before

Local storm report, May 5, 4:04 AM EDT, 3 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
404 AM EDT FRI MAY 05 2017

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

0350 AM     TSTM WND DMG     4 SE EDEN               36.47N 79.69W
05/05/2017                   ROCKINGHAM         NC   TRAINED SPOTTER

            THUNDERSTORM WINDS DOWNED AT LEAST TWO TREES OUTSIDE OF
            THE COMMUNITY OF EDEN. WIND ESTIMATES AT THE TIME WERE 40
            TO 50 MILES PER HOUR. TIME RADAR ESTIMATED.

&&

JMORROW

Local storm report, May 5, 4:30 AM EDT, 2 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
430 AM EDT FRI MAY 05 2017

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

0411 AM     TSTM WND DMG     5 SSE MONETA            37.11N 79.62W
05/05/2017                   BEDFORD            VA   BROADCAST MEDIA

            BROADCAST MEDIA RELAYS REPORT OF MULTIPLE LARGE TREES
            DOWN, DAMAGE TO THE ROOF OF A SINGLE DWELLING, AND BROKEN
            WINDOWS IN THE DWELLING DUE TO THUNDERSTORM WINDS.

&&

JMORROW

Special weather statement, May 5, 4:40 AM EDT, 2 hours 42 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
440 AM EDT FRI MAY 5 2017

VAZ044>046-050945-
Campbell-Pittsylvania-Appomattox-
440 AM EDT FRI MAY 5 2017

...A LINE OF SHOWERS WILL AFFECT
WESTERN APPOMATTOX...CAMPBELL...AND NORTHEASTERN PITTSYLVANIA
COUNTIES AND THE SOUTHERN CITY OF LYNCHBURG...

At 439 AM EDT, radar indicated showers were located along a line
extending from near Timberlake to near Gretna. Movement was northeast
at 40 mph.

Wind gusts up to 40 mph are possible with these showers. With a
saturated ground, winds of 30 to 40 mph can uproot trees.

Locations impacted include...
Lynchburg...
Altavista...
Hurt...
Gretna...
and Brookneal.

These showers may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3706 7889 3704 7895 3705 7897 3703 7900
      3706 7909 3697 7911 3685 7941 3731 7929
      3735 7926 3742 7914 3739 7906 3742 7907
      3742 7904 3743 7904 3743 7902 3749 7894
      3750 7895 3750 7892 3753 7889 3754 7886
TIME...MOT...LOC 0839Z 215DEG 42KT 3732 7931 3691 7939

RS

Local storm report, May 5, 4:47 AM EDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
447 AM EDT FRI MAY 05 2017

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

0400 AM     TSTM WND DMG     4 W WESTOVER HILLS      36.60N 79.53W
05/05/2017                   PITTSYLVANIA       VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN ON BERRY HILL ROAD.

&&

16

Local storm report, May 5, 5:20 AM EDT, 2 hours 2 minutes before

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Local storm report, May 5, 5:55 AM EDT, 1 hour 27 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 9:03 PM EDT	Special Weather Statement	RNK	Alleghany, Amherst, Bath, Botetourt, Rockbridge, City of Buena Vista and 3 more	87 min
May 4, 9:33 PM EDT	Special Weather Statement	RNK	Carroll, Grayson, Smyth, Wythe, City of Galax	57 min
May 5, 2:16 AM EDT	Areal Flood Warning	RNK	Carroll, Floyd, Franklin, Grayson, Patrick, City of Galax	6 hr
May 5, 3:15 AM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	45 min
May 5, 3:36 AM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Danville	54 min
May 5, 3:45 AM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Henry, Pittsylvania	60 min
May 5, 4:31 AM EDT	Severe Thunderstorm Warning	RNK	Halifax	59 min
May 5, 4:40 AM EDT	Special Weather Statement	RNK	Campbell	65 min
May 5, 4:56 AM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	42 min
May 5, 5:07 AM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	23 min
May 5, 5:14 AM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham, Campbell	58 min
May 5, 7:06 AM EDT	Areal Flood Advisory	RNK	Roanoke, City of Roanoke, City of Salem	6 hr
May 5, 8:16 AM EDT	Areal Flood Warning	RNK	Rockbridge, City of Buena Vista	6 hr
May 5, 2:59 PM EDT	River Flood Warning	RNK	Charlotte, Halifax	64 hr
May 5, 2:59 PM EDT	River Flood Warning	RNK	Pittsylvania, City of Danville	32 hr
May 5, 2:59 PM EDT	River Flood Warning	RNK	Halifax	48 hr
May 4, 8:19 PM EDT	Special Weather Statement	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes, Yadkin	71 min
May 5, 12:36 AM EDT	Flash Flood Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	6 hr
May 5, 6:37 PM EDT	Special Weather Statement	RNK	Mercer, Summers	53 min

Nearby

Areal Flood Warnings in Virginia, 2017 Every areal flood warning in 2017

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.