Alert archive / Virginia / Special Weather Statements in 2012
Special Weather Statement, NWS Blacksburg, VA
NWS Blacksburg, VA issued this special weather statement at Jul 31, 2012, 1:08 PM EDT for Grayson County, Smyth County, Virginia. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2012, 1:08 PM EDT (17:08 UTC)
- Expired
- Jul 31, 2012, 2:15 PM EDT
- In force
- 67 min
- Issued by
- NWS Blacksburg, VA
Counties Grayson County, VA, Smyth County, VA
The radar
The Roanoke radar (KFCX), 111 km from the middle of the area, began a volume at 17:08 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, 5.1 hours before the alert went out and 167 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.
- Mixed-layer CAPE
- 135 J/kg
- Mixed-layer CIN
- -167 J/kg
- Mixed-layer LCL
- 830 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
257
WWUS81 KRNK 311708
SPSRNK
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
108 PM EDT TUE JUL 31 2012
VAZ009-015-311815-
GRAYSON VA-SMYTH VA-
108 PM EDT TUE JUL 31 2012
...STRONG THUNDERSTORMS WILL AFFECT GRAYSON AND SMYTH COUNTIES...
AT 104 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM 6 MILES
WEST OF CHILHOWIE TO 4 MILES WEST OF TROUTDALE TO 5 MILES WEST OF
MOUTH OF WILSON...MOVING EAST AT 15 MPH.
WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
THESE STORMS WILL BE NEAR VOLNEY...AND TROUTDALE AROUND 115 PM...
QUARRY...SALTVILLE...ALLISON GAP...AND MOUTH OF WILSON AROUND 120
PM...THOMAS BRIDGE...AND CHILHOWIE AROUND 125 PM...ADWOLF AROUND 130
PM AND BROADFORD AROUND 140 PM.
LAT...LON 3697 8171 3693 8167 3699 8158 3701 8147
3699 8148 3699 8147 3701 8144 3691 8135
3676 8126 3659 8104 3656 8107 3658 8153
3666 8159 3668 8165 3678 8170 3693 8183
$$
WERTThe office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 8:16 PM EDT | Severe Thunderstorm Warning | RNK | Halifax, Pittsylvania | 59 min |
| Jul 30, 9:24 PM EDT | Special Weather Statement | RNK | Pittsylvania | 66 min |
| Jul 31, 3:02 PM EDT | Special Weather Statement | RNK | Roanoke | 58 min |
| Jul 31, 3:12 PM EDT | Special Weather Statement | RNK | Tazewell | 63 min |
| Jul 31, 3:36 PM EDT | Flash Flood Warning | RNK | Tazewell | 6 hr |
| Jul 31, 3:44 PM EDT | Special Weather Statement | RNK | Bath | 61 min |
| Jul 31, 4:01 PM EDT | Special Weather Statement | RNK | Montgomery, City of Radford | 59 min |
| Jul 31, 7:06 PM EDT | Special Weather Statement | RNK | Bath | 54 min |
| Jul 31, 4:06 PM EDT | Special Weather Statement | RNK | Mercer | 54 min |
| Jul 31, 5:09 PM EDT | Special Weather Statement | RNK | Greenbrier | 66 min |
| Jul 31, 5:48 PM EDT | Special Weather Statement | RNK | Greenbrier | 57 min |
| Jul 31, 7:12 PM EDT | Special Weather Statement | RNK | Greenbrier | 63 min |
Nearby
Special Weather Statements in Virginia, 2012Every special weather statement in 2012
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.