Alert archive / Virginia / Flash Flood Watches in 2019

Flash Flood Watch 2, NWS Morristown, TN

May 4, 20197 counties in Virginia

NWS Morristown, TN issued this flash flood watch at May 4, 2019, 12:16 PM EDT for 7 counties in Virginia. It took effect at May 4, 2019, 5:00 PM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 4, 2019, 12:16 PM EDT (16:16 UTC)
In effect from: May 4, 2019, 5:00 PM EDT
Expired: May 5, 2019, 5:00 AM EDT
In force: 12 hr
Issued by: NWS Morristown, TN
Flood severity: None

Counties City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 109 km from the middle of the area, began a volume at 16:19 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.3 hours before the alert went out and 243 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: 192 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 796 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Morristown, TN wrote its last area forecast discussion before this flash flood watch went out at May 3, 7:47 PM EDT, 16 hours 29 minutes earlier.

Area forecast discussion, May 3, 7:47 PM EDT, 16 hours 29 minutes before

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Hazardous weather outlook, May 3, 2:56 PM EDT, 21 hours 20 minutes before

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The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 3, 8:54 PM EDT	Special Weather Statement	MRX	Carter	51 min
May 4, 9:56 AM EDT	Special Weather Statement	MRX	Hamilton, Marion, Sequatchie	64 min
May 4, 10:29 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	46 min
May 4, 10:52 AM EDT	Severe Thunderstorm Warning	MRX	Bradley	44 min
May 4, 11:12 AM EDT	Special Weather Statement	MRX	McMinn, Meigs, Rhea	63 min
May 4, 11:28 AM EDT	Special Weather Statement	MRX	Bledsoe	47 min
May 4, 11:32 AM EDT	Special Weather Statement	MRX	Polk	43 min
May 4, 11:58 AM EDT	Special Weather Statement	MRX	Blount, Knox, Loudon, Monroe	62 min
May 4, 12:41 PM EDT	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Scott	49 min
May 4, 1:00 PM EDT	Special Weather Statement	MRX	Blount, Grainger, Jefferson, Knox, Sevier, Union	60 min
May 4, 1:34 PM EDT	Special Weather Statement	MRX	Cocke, Hamblen, Jefferson, Sevier	56 min
May 4, 1:59 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	42 min
May 4, 2:46 PM EDT	Special Weather Statement	MRX	Greene	44 min
May 4, 3:12 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Unicoi, Washington	48 min
May 4, 3:42 PM EDT	Special Weather Statement	MRX	Carter, Johnson, Sullivan	63 min
May 4, 12:19 PM EDT	Special Weather Statement	MRX	Cherokee, Clay	56 min
May 4, 12:55 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	49 min

Nearby

Flash Flood Watches in Virginia, 2019 Every flash flood watch in 2019

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.