Alert archive / Virginia / Heat Advisories in 2018

Heat Advisory 2, NWS Blacksburg, VA

July 2, 2018Buckingham County, Virginia

NWS Blacksburg, VA issued this heat advisory at Jul 2, 2018, 2:45 PM EDT for Buckingham County, Virginia. It took effect at Jul 3, 2018, 12:00 PM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 2, 2018, 2:45 PM EDT (18:45 UTC)
In effect from: Jul 3, 2018, 12:00 PM EDT
Expired: Jul 3, 2018, 8:00 PM EDT
In force: 8 hr
Issued by: NWS Blacksburg, VA

County Buckingham County, VA

The radar

The Norfolk radar (KAKQ), 150 km from the middle of the area, began a volume at 18:47 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 12:00Z, 6.8 hours before the alert went out and 95 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: 935 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 957 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 65 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 heat advisory 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 heat advisory went out at Jul 2, 1:38 PM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 2, 1:38 PM EDT, 1 hour 7 minutes before

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Hazardous weather outlook, Jul 2, 9:26 AM EDT, 5 hours 19 minutes before

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In the hours before

Special weather statement, Jul 2, 12:45 PM EDT, 2 hours before

Special Weather Statement
National Weather Service BLACKSBURG VA
1245 PM EDT MON JUL 2 2018

VAZ015-016-021715-
Grayson-Carroll-
1245 PM EDT MON JUL 2 2018

...A STRONG THUNDERSTORM WILL AFFECT
SOUTHWESTERN CARROLL AND SOUTHEASTERN GRAYSON COUNTIES AND THE CITY
OF GALAX...

Until 115 PM EDT

At 1245 PM EDT, a strong thunderstorm was located over Cumberland
Knob. the storm is moving slowly north at 5 to 10 MPH.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Galax...
and Pipers Gap.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3656 8095 3670 8097 3669 8080 3656 8088
TIME...MOT...LOC 1645Z 195DEG 4KT 3658 8092

PH

Special weather statement, Jul 2, 1:13 PM EDT, 1 hour 32 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
113 PM EDT MON JUL 2 2018

VAZ017-032-033-021800-
Franklin-Patrick-Floyd-
113 PM EDT MON JUL 2 2018

...A STRONG THUNDERSTORM WILL AFFECT
EAST CENTRAL FLOYD...WEST CENTRAL FRANKLIN AND NORTH CENTRAL PATRICK
COUNTIES...

Until 200 PM EDT

At 113 PM EDT, a strong thunderstorm was located near Floyd, moving
northeast at 10 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Floyd...
Woolwine...
Charity...
Rocky Knob Recreation Area...
and Endicott.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3677 8026 3678 8034 3702 8033 3698 8006
TIME...MOT...LOC 1713Z 211DEG 8KT 3687 8027

PW

Special weather statement, Jul 2, 2:14 PM EDT, 31 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
214 PM EDT MON JUL 2 2018

VAZ012-013-016-021915-
Pulaski-Wythe-Carroll-
214 PM EDT MON JUL 2 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN PULASKI...NORTHEASTERN
WYTHE AND NORTHEASTERN CARROLL COUNTIES...

Until 315 PM EDT

At 213 PM EDT, a strong thunderstorm was located near Sylvatus,
moving north at 15 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Pulaski...
Hillsville...
Dublin...
Patterson...
and Allisonia.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3708 8091 3709 8058 3695 8058 3694 8060
      3694 8061 3693 8064 3687 8059 3676 8059
      3675 8083
TIME...MOT...LOC 1813Z 175DEG 10KT 3683 8073

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 9:11 AM EDT	Heat Advisory	RNK	Buckingham	11 hr
Jul 2, 12:45 PM EDT	Special Weather Statement	RNK	City of Galax	30 min
Jul 2, 1:13 PM EDT	Special Weather Statement	RNK	Floyd	47 min
Jul 2, 2:14 PM EDT	Special Weather Statement	RNK	Pulaski	61 min
Jul 2, 2:52 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	53 min
Jul 2, 3:42 PM EDT	Areal Flood Advisory	RNK	Botetourt, Roanoke, City of Roanoke, City of Salem	3 hr
Jul 2, 3:47 PM EDT	Special Weather Statement	RNK	Smyth	58 min
Jul 2, 3:51 PM EDT	Special Weather Statement	RNK	Craig	54 min
Jul 2, 4:02 PM EDT	Special Weather Statement	RNK	Giles	58 min
Jul 2, 4:49 PM EDT	Special Weather Statement	RNK	Montgomery	56 min
Jul 2, 5:05 PM EDT	Special Weather Statement	RNK	Bland	55 min
Jul 2, 5:25 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Tazewell	65 min
Jul 2, 5:54 PM EDT	Special Weather Statement	RNK	Floyd, Montgomery	66 min
Jul 1, 9:23 PM EDT	Special Weather Statement	RNK	Alleghany, Wilkes	67 min
Jul 1, 10:08 PM EDT	Special Weather Statement	RNK	Watauga	37 min
Jul 1, 10:44 PM EDT	Special Weather Statement	RNK	Watauga	31 min
Jul 1, 11:15 PM EDT	Special Weather Statement	RNK	Ashe	30 min
Jul 2, 4:59 PM EDT	Special Weather Statement	RNK	Wilkes	61 min
Jul 2, 6:15 PM EDT	Special Weather Statement	RNK	Summers	60 min

Nearby

Heat Advisories in Virginia, 2018 Every heat advisory in 2018

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.