Alert archive / North Carolina / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 145, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 20, 2013, 12:47 PM EDT for Surry County, Yadkin County, North Carolina. It was in force for 43 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
- Jul 20, 2013, 12:47 PM EDT (16:47 UTC)
- Expired
- Jul 20, 2013, 1:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
Counties Surry County, NC, Yadkin County, NC
The radar
The Roanoke radar (KFCX), 89 km from the middle of the area, began a volume at 16:49 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, 4.8 hours before the alert went out and 73 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
- 1715 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 10:11 AM EDT, 2 hours 36 minutes earlier.
Area forecast discussion, Jul 20, 10:11 AM EDT, 2 hours 36 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 350 AM EDT SAT JUL 20 2013 NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059- WVZ042>045-210800- ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES- YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON- CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE- PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL- APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE- GREENBRIER- 350 AM EDT SAT JUL 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH CENTRAL VIRGINIA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND SOUTHEAST WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. BANDS OR CLUSTERS OF STRONGER THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING. A FEW OF THE STORMS MAY BE SEVERE WITH DAMAGING WINDS AND HAIL. FLASH FLOODING COULD ALSO OCCUR IN ANY OF THE SLOW MOVING STORMS THAT PERSIST OR TRAIN ACROSS THE SAME AREAS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE ACROSS THE AREA NEAR A WEAK COLD FRONT THAT WILL LINGER INTO EARLY NEXT WEEK. THIS WILL RESULT IN MORE OF A FLASH FLOODING THREAT SUNDAY THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON INTO THIS EVENING.
In the hours before
Special weather statement, Jul 20, 9:19 AM EDT, 3 hours 28 minutes before
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</html>The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:19 AM EDT | Special Weather Statement | RNK | Grayson | 56 min |
| Jul 20, 1:20 PM EDT | Special Weather Statement | RNK | City of Martinsville | 55 min |
| Jul 20, 2:12 PM EDT | Special Weather Statement | RNK | Henry, City of Martinsville | 48 min |
| Jul 20, 2:46 PM EDT | Special Weather Statement | RNK | Campbell | 29 min |
| Jul 20, 3:07 PM EDT | Special Weather Statement | RNK | Rockbridge | 23 min |
| Jul 20, 3:27 PM EDT | Special Weather Statement | RNK | Campbell | 33 min |
| Jul 20, 3:57 PM EDT | Special Weather Statement | RNK | City of Buena Vista | 18 min |
| Jul 20, 4:41 PM EDT | Special Weather Statement | RNK | Pulaski | 64 min |
| Jul 20, 4:57 PM EDT | Special Weather Statement | RNK | Halifax | 63 min |
| Jul 20, 5:15 PM EDT | Areal Flood Advisory | RNK | Pulaski | 60 min |
| Jul 20, 5:25 PM EDT | Special Weather Statement | RNK | Appomattox, City of Lynchburg | 50 min |
| Jul 20, 5:34 PM EDT | Special Weather Statement | RNK | Giles | 41 min |
| Jul 20, 5:44 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox | 61 min |
| Jul 20, 5:59 PM EDT | Severe Thunderstorm Warning | RNK | Buckingham | 46 min |
| Jul 20, 6:32 PM EDT | Special Weather Statement | RNK | Appomattox | 58 min |
| Jul 20, 6:47 PM EDT | Flash Flood Warning | RNK | Amherst, Appomattox, Campbell, City of Lynchburg | 3 hr |
| Jul 20, 7:09 PM EDT | Special Weather Statement | RNK | Bath | 66 min |
| Jul 20, 10:52 AM EDT | Special Weather Statement | RNK | Wilkes | 38 min |
| Jul 20, 12:39 PM EDT | Special Weather Statement | RNK | Stokes | 51 min |
| Jul 19, 8:09 PM EDT | Flash Flood Warning | RNK | Greenbrier, Summers | 3 hr |
| Jul 20, 12:14 PM EDT | Special Weather Statement | RNK | Monroe | 61 min |
| Jul 20, 7:35 PM EDT | Special Weather Statement | RNK | Greenbrier | 55 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2013Every severe thunderstorm warning in 2013
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.