Alert archive / North Carolina / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 137, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 23, 2023, 5:39 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 66 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 23, 2023, 5:39 PM EDT (21:39 UTC)
- Expired
- Jul 23, 2023, 6:45 PM EDT
- In force
- 66 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Caswell County, NC, Rockingham County, NC
The radar
The Roanoke radar (KFCX), 95 km from the middle of the area, began a volume at 21:41 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, 9.7 hours before the alert went out and 90 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
- 385 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 786 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 23, 2:05 PM EDT, 3 hours 34 minutes earlier.
Area forecast discussion, Jul 23, 2:05 PM EDT, 3 hours 34 minutes before
Area Forecast Discussion National Weather Service Blacksburg VA 205 PM EDT Sun Jul 23 2023 .SYNOPSIS... An upper disturbance passes across this afternoon and evening. Low pressure moves along a front across the eastern Carolinas Monday. High pressure builds in Tuesday and remains across the Carolinas through the end of the week, with temperatures warming to above normal be the dry day of the week under high pressure. Temperatures will warm through the course of the week. && .NEAR TERM /THROUGH MONDAY/... As of 146 PM EDT Sunday... A few strong storms possible this afternoon/evening along with heavy rain... Storms already firing up but for now just producing heavy and lightning, maybe some gusty winds, with DCAPEs above 800 J/kg along/east of the mountains. MLCAPEs of 500-1000 J/kg should increase to 1000-1500 this afternoon, with best instability over the NC foothills/piedmont. Locally damaging winds, maybe hail up to nickel size possible in the stronger storms but isolated. Fortunately pwats are in the 1.0 to 1.3 inch range with 1hr rainfall rates of 1.5 to 2.0"/hr observed. This should limit flooding but any repeat storms could cause localized flooding issues through this evening. Shortwave over KY helping enhance divergence aloft with some weak low level upslope convergence as well. Overall not a great setup for numerous storms, so mainly looking at scattered coverage through the evening and most of this moving east of the mountains by late afternoon. Frontal boundary draped over the southeast NC to Florida panhandle tonight with a low pressure wave moving across it may keep shower or storm chances going into the morning Monday in the piedmont. Further west, skies clear enough that fog may become an issue Monday morning barring any leftover clouds from the exiting wave. Monday should be drier but vicinity of the front and another wave aloft may be sufficient for more shower/storm scattered coverage Monday afternoon but most models favor better coverage north and east of our forecast area. So for now, have 30 pops from the Alleghany Highlands of VA southeast to the central VA piedmont, with isolated coverage as far southwest as the New River Valley into the NC piedmont. With moist airmass, low temps will be slightly milder tonight in the mid to upper 60s east to upper 50s to around 60 west. Monday should be seasonably warm with 80s for most except some 70s in the higher elevations. Forecast confidence is moderate to high on most elements except storm coverage. && .SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/... As of 120 PM EDT Sunday... An upper level trough will pivot over the region Monday night. This trough exits the region Tuesday with heights building on Wednesday. Rain chances through the period are very low with low and mid level ridging centered over the region. Temperatures will run warmer than normal with 80s across the mountains and low to mid 90s east. Dew points in the 60s are not outrageous for this time of year, but with light winds, temperatures will feel a few degrees warmer than what they actual are. && .LONG TERM /THURSDAY THROUGH SUNDAY/... As of 130 PM EDT Sunday... Heights continue to increase and so will the temperatures Thursday and Friday. Temperatures across the mountains will range from the mid and upper 80s to low and mid 90s east of the Blue Ridge. Rain chances remain low but could see a late day storm pop-up only to fade in the evening. Some models are keeping the ridge strong over the region into next weekend. If this is the case, an approaching front may not move south of I-64. && .AVIATION /18Z SUNDAY THROUGH FRIDAY/... As of 123 PM EDT Sunday... Have mainly VFR through this evening. Scattered storms will be hit/miss this afternoon/evening but best chance will be along/east of ROA/BCB. For now am just going VCTS and amend as necessary. Any storms fade this evening, though DAN could expect to have convection around right through midnight. Overnight the moisture in the low levels and scattering out of clouds will lead to fog at least across the mountains and possibly foothills, so have MVFR to IFR at times, with the lowest at LWB. Fog/low clouds scatter out around 13-14z with VFR thereafter. More storms possible but mainly northeast of a line from HSP-LYH Monday after 18z. High confidence on ceilings/vsbys and wind through 00z, then average on cigs/vsbys overnight. Low to moderate confidence on storms. EXTENDED AVIATION OUTLOOK... More afternoon and evening thunderstorms with possible MVFR ceiling and visibility Monday. Mainly VFR outside of morning fog Tue-Fri. Warmer with just isolated afternoon/evening convection mainly in the mountains. && .RNK WATCHES/WARNINGS/ADVISORIES... VA...None. NC...None. WV...None. && SYNOPSIS...AMS/WP NEAR TERM...WP SHORT TERM...RCS LONG TERM...RCS AVIATION...AMS/WP
Hazardous weather outlook, Jul 23, 12:59 PM EDT, 4 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Blacksburg VA 1259 PM EDT Sun Jul 23 2023 VAZ013-014-018>020-022>024-034-035-045>047-241700- Pulaski-Montgomery-Craig-Alleghany VA-Bath-Roanoke-Botetourt- Rockbridge-Bedford-Amherst-Campbell-Appomattox-Buckingham- 1259 PM EDT Sun Jul 23 2023 This Hazardous Weather Outlook is for central Virginia, south central Virginia, southwest Virginia and west central Virginia. .DAY ONE...This afternoon and tonight. Scattered thunderstorms this afternoon through late this evening will have the potential to produce heavy rain. This may lead to localized flooding. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ001>006-018>020-VAZ015>017-032-033-043-044-058-059-241700- Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes- Yadkin-Grayson-Carroll-Floyd-Patrick-Franklin-Henry-Pittsylvania- Halifax-Charlotte- 1259 PM EDT Sun Jul 23 2023 This Hazardous Weather Outlook is for north central North Carolina, northwest North Carolina, south central Virginia, southwest Virginia and west central Virginia. .DAY ONE...This afternoon and tonight. Scattered thunderstorms this afternoon through late this evening will have the potential to produce heavy rain. This may lead to localized flooding. In addition, an isolated severe thunderstorm is possible with damaging winds the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. VAZ007-009>012-WVZ042>044-507-508-241700- Tazewell-Smyth-Bland-Giles-Wythe-Mercer-Summers-Monroe- Eastern Greenbrier-Western Greenbrier- 1259 PM EDT Sun Jul 23 2023 This Hazardous Weather Outlook is for southwest Virginia and southeast West Virginia. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Monday through Saturday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Jul 23, 4:01 PM EDT, 1 hour 38 minutes before
Preliminary Local Storm Report
National Weather Service Blacksburg VA
401 PM EDT Sun Jul 23 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0228 PM Tstm Wnd Dmg 3 SW Stuart 36.60N 80.31W
07/23/2023 Patrick VA 911 Call Center
Tree Down.
0230 PM Tstm Wnd Dmg 1 ENE Stuart 36.64N 80.27W
07/23/2023 Patrick VA 911 Call Center
Multiple reports of trees down in Stuart.
0235 PM Tstm Wnd Dmg 2 E Stuart 36.63N 80.25W
07/23/2023 Patrick VA 911 Call Center
Trees Down.
&&Special weather statement, Jul 23, 4:12 PM EDT, 1 hour 27 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
412 PM EDT Sun Jul 23 2023
VAZ011-014-018-022-232045-
Giles VA-Montgomery VA-Craig VA-Roanoke VA-
412 PM EDT Sun Jul 23 2023
...A strong thunderstorm will impact portions of
west central Roanoke, east central Giles, southwestern Craig and
northeastern Montgomery Counties through 445 PM EDT...
At 412 PM EDT, Doppler radar was tracking a strong thunderstorm over
Huffman, or near Newport, moving east at 20 mph.
HAZARD...Winds in excess of 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Sinking Creek...
Huffman...
Mc Donalds Mill...
Simmonsville...
and Bradshaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3730 8050 3737 8053 3747 8029 3738 8020
3729 8022
TIME...MOT...LOC 2012Z 258DEG 19KT 3735 8043
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH
ASSpecial weather statement, Jul 23, 4:46 PM EDT, 53 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
446 PM EDT Sun Jul 23 2023
VAZ019-020-023-232115-
Botetourt VA-Bath VA-Alleghany VA-
446 PM EDT Sun Jul 23 2023
...A strong thunderstorm will impact portions of
central Alleghany, southwestern Bath and north central Botetourt
Counties in west central Virginia and the City of Covington through
515 PM EDT...
At 445 PM EDT, Doppler radar was tracking a strong thunderstorm over
Low Moor, or near Covington, moving northeast at 25 mph.
HAZARD...Winds in excess of 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Covington...
Clifton Forge...
Hot Springs...
Millboro...
Warm Springs...
Iron Gate...
and Lake Moomaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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 3767 7986 3775 8006 3809 7989 3796 7959
TIME...MOT...LOC 2045Z 209DEG 22KT 3778 7992
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH
ASLocal storm report, Jul 23, 4:53 PM EDT, 46 minutes before
Preliminary Local Storm Report
National Weather Service Blacksburg VA
453 PM EDT Sun Jul 23 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM Tstm Wnd Dmg Ridgeway 36.59N 79.86W
07/23/2023 Henry VA 911 Call Center
Tree Down.
0334 PM Tstm Wnd Dmg 1 SE Villa Heights 36.69N 79.89W
07/23/2023 City of MartinsvillVA 911 Call Center
Tree blocking the entire road.
0340 PM Tstm Wnd Dmg 1 ESE Villa Heights 36.69N 79.89W
07/23/2023 City of MartinsvillVA 911 Call Center
Tree Down.
&&Special weather statement, Jul 23, 5:05 PM EDT, 34 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
505 PM EDT Sun Jul 23 2023
VAZ022-023-033-034-232130-
Botetourt VA-Franklin VA-Roanoke VA-Bedford VA-
505 PM EDT Sun Jul 23 2023
...A strong thunderstorm will impact portions of
northeastern Roanoke, west central Bedford, south central Botetourt
and north central Franklin Counties and the City of Roanoke through
530 PM EDT...
At 505 PM EDT, Doppler radar was tracking a strong thunderstorm over
Vinton, moving east at 10 mph.
HAZARD...Winds in excess of 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Roanoke...
Vinton...
Stewartsville...
Montvale...
Hollins...
Northwest Smith Mountain Lake...
and Goodview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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 3722 8002 3737 7995 3739 7964 3715 7973
TIME...MOT...LOC 2105Z 287DEG 8KT 3726 7990
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH
ASSpecial weather statement, Jul 23, 5:32 PM EDT, 7 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 22, 9:23 PM EDT | Special Weather Statement | RNK | Smyth | 22 min |
| Jul 23, 12:26 PM EDT | Special Weather Statement | RNK | Carroll | 34 min |
| Jul 23, 12:58 PM EDT | Special Weather Statement | RNK | Carroll, Floyd | 47 min |
| Jul 23, 1:12 PM EDT | Areal Flood Advisory | RNK | Carroll, Grayson, City of Galax | 108 min |
| Jul 23, 1:27 PM EDT | Special Weather Statement | RNK | Pulaski, City of Radford | 33 min |
| Jul 23, 1:44 PM EDT | Special Weather Statement | RNK | Patrick | 46 min |
| Jul 23, 2:07 PM EDT | Severe Thunderstorm Warning | RNK | Patrick | 53 min |
| Jul 23, 2:19 PM EDT | Special Weather Statement | RNK | Floyd | 26 min |
| Jul 23, 2:19 PM EDT | Special Weather Statement | RNK | City of Galax | 26 min |
| Jul 23, 2:27 PM EDT | Special Weather Statement | RNK | Floyd | 33 min |
| Jul 23, 2:27 PM EDT | Special Weather Statement | RNK | Botetourt | 33 min |
| Jul 23, 2:43 PM EDT | Special Weather Statement | RNK | Roanoke, City of Roanoke, City of Salem | 32 min |
| Jul 23, 3:12 PM EDT | Special Weather Statement | RNK | Henry, City of Martinsville | 48 min |
| Jul 23, 3:39 PM EDT | Special Weather Statement | RNK | Botetourt | 36 min |
| Jul 23, 3:58 PM EDT | Severe Thunderstorm Warning | RNK | Franklin, Henry, Pittsylvania, City of Martinsville | 62 min |
| Jul 23, 4:12 PM EDT | Special Weather Statement | RNK | Craig | 33 min |
| Jul 23, 4:38 PM EDT | Severe Thunderstorm Warning | RNK | Halifax, Pittsylvania, City of Danville | 42 min |
| Jul 23, 4:46 PM EDT | Special Weather Statement | RNK | Alleghany, City of Covington | 29 min |
| Jul 23, 4:47 PM EDT | Areal Flood Advisory | RNK | Henry, City of Martinsville | 3 hr |
| Jul 23, 5:05 PM EDT | Special Weather Statement | RNK | City of Roanoke | 25 min |
| Jul 23, 5:13 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Bath, Rockbridge | 62 min |
| Jul 23, 5:22 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Roanoke, City of Roanoke | 53 min |
| Jul 23, 5:29 PM EDT | Flash Flood Warning | RNK | Bedford, Botetourt, Roanoke, City of Roanoke | 3 hr |
| Jul 23, 5:32 PM EDT | Special Weather Statement | RNK | Giles | 28 min |
| Jul 23, 5:50 PM EDT | Severe Thunderstorm Warning | RNK | Roanoke, City of Roanoke, City of Salem | 55 min |
| Jul 23, 6:14 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Botetourt, Roanoke, City of Roanoke | 61 min |
| Jul 23, 6:34 PM EDT | Special Weather Statement | RNK | Grayson, City of Galax | 26 min |
| Jul 23, 7:10 PM EDT | Special Weather Statement | RNK | Wythe | 35 min |
| Jul 23, 7:21 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany | 54 min |
| Jul 23, 7:27 PM EDT | Special Weather Statement | RNK | Charlotte | 33 min |
| Jul 23, 7:28 PM EDT | Special Weather Statement | RNK | Bedford, City of Lynchburg | 32 min |
| Jul 23, 7:35 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Floyd, Pulaski, Wythe | 55 min |
| Jul 23, 12:55 PM EDT | Special Weather Statement | RNK | Alleghany | 50 min |
| Jul 23, 2:58 PM EDT | Special Weather Statement | RNK | Alleghany | 32 min |
| Jul 23, 3:29 PM EDT | Special Weather Statement | RNK | Surry | 31 min |
| Jul 23, 4:32 PM EDT | Severe Thunderstorm Warning | RNK | Wilkes | 58 min |
| Jul 23, 4:59 PM EDT | Areal Flood Advisory | RNK | Surry, Wilkes, Yadkin | 3 hr |
| Jul 23, 6:05 PM EDT | Special Weather Statement | RNK | Alleghany | 25 min |
| Jul 23, 7:12 PM EDT | Special Weather Statement | RNK | Monroe | 33 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2023Every severe thunderstorm warning in 2023
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.