Alert archive / Virginia / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 39, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 4, 2021, 4:57 PM EDT for Spotsylvania County, Stafford County, City of Fredericksburg, Virginia. It was in force for 48 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 4, 2021, 4:57 PM EDT (20:57 UTC)
- Expired
- May 4, 2021, 5:45 PM EDT
- In force
- 48 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties City of Fredericksburg, VA, Spotsylvania County, VA, Stafford County, VA
The radar
The Sterling radar (KLWX), 89 km from the middle of the area, began a volume at 20:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 4, 5:01 PM EDT | TSTM WND DMG | Spotsylvania, VA | MULTIPLE TREES DOWN NEAR LAKE ANNA IN THE HOLLADAY AND KIRK O'CLIFF NEIGHBORHOODS. |
| May 4, 5:01 PM EDT | TSTM WND DMG | Spotsylvania, VA | REPORTS OF SEVERAL TREES DOWN IN THE AREA OF THE INTERSECTION OF LEWISTON RD. AND BELFONTE RD. |
| May 4, 5:03 PM EDT | TSTM WND DMG | 2 Sse Gatewood, VA | MULTIPLE DOWNED TREES BLOCKING ROADWAYS IN SOUTHERN SPOTSYLVANIA COUNTY |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 4, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 87 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
- 82 J/kg
- Mixed-layer CIN
- -253 J/kg
- Mixed-layer LCL
- 1036 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
355
WUUS51 KLWX 042057
SVRLWX
VAC177-179-630-042145-
/O.NEW.KLWX.SV.W.0039.210504T2057Z-210504T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
457 PM EDT Tue May 4 2021
The National Weather Service in Sterling Virginia has issued a
* Severe Thunderstorm Warning for...
Southern Stafford County in northern Virginia...
The City of Fredericksburg in central Virginia...
Spotsylvania County in central Virginia...
* Until 545 PM EDT.
* At 456 PM EDT, severe thunderstorms were located along a line
extending from 12 miles east of Orange to near Mineral, moving east
at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement. These storms have a history of producing
tree damage.
IMPACT...Damaging winds will cause some trees and large branches
to fall. This could injure those outdoors, as well as
damage homes and vehicles. Roadways may become blocked by
downed trees. Localized power outages are possible.
Unsecured light objects may become projectiles.
* Locations impacted include...
Fredericksburg, Massaponax, Spotsylvania, Falmouth, Passapatanzy,
Stones Corner, Leeland, Brokenburg, Snell, Spring Valley, Alsop,
Gatewood, Chancellorsville, Partlow, Post Oak, Thornburg, White
Oak, Brookfield and Cookstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3801 7771 3803 7773 3803 7775 3805 7775
3805 7777 3808 7779 3836 7769 3836 7730
3834 7730 3834 7733 3832 7733 3827 7735
3825 7733 3825 7735 3824 7738 3799 7764
TIME...MOT...LOC 2056Z 257DEG 36KT 3830 7788 3793 7789
HAIL...<.75IN
WIND...60MPH
$$
ADS2 follow-up statements
949
WWUS51 KLWX 042126
SVSLWX
Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
526 PM EDT Tue May 4 2021
VAC177-179-630-042145-
/O.CON.KLWX.SV.W.0039.000000T0000Z-210504T2145Z/
Stafford VA-City of Fredericksburg VA-Spotsylvania VA-
526 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHERN STAFFORD AND EASTERN SPOTSYLVANIA COUNTIES AND THE CITY
OF FREDERICKSBURG...
At 526 PM EDT, severe thunderstorms were located along a line
extending from near Fredericksburg to near Massaponax, moving east at
45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damaging winds will cause some trees and large branches to
fall. This could injure those outdoors, as well as damage
homes and vehicles. Roadways may become blocked by downed
trees. Localized power outages are possible. Unsecured
light objects may become projectiles.
Locations impacted include...
Fredericksburg, Massaponax, Spotsylvania, Falmouth, Passapatanzy,
Stones Corner, Chancellorsville, Leeland, Thornburg, White Oak,
Brookfield and Spring Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3807 7756 3836 7768 3836 7730 3834 7730
3834 7733 3832 7733 3827 7735 3825 7733
3825 7735 3824 7738
TIME...MOT...LOC 2126Z 250DEG 40KT 3837 7751 3815 7742
HAIL...<.75IN
WIND...60MPH
$$
ADS527
WWUS51 KLWX 042145
SVSLWX
Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
545 PM EDT Tue May 4 2021
VAC177-179-630-042155-
/O.EXP.KLWX.SV.W.0039.000000T0000Z-210504T2145Z/
Stafford VA-City of Fredericksburg VA-Spotsylvania VA-
545 PM EDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN STAFFORD AND EASTERN
SPOTSYLVANIA COUNTIES AND THE CITY OF FREDERICKSBURG HAS EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and northern Virginia.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sterling Virginia.
LAT...LON 3807 7756 3836 7768 3836 7730 3834 7730
3834 7733 3832 7733 3827 7735 3825 7733
3825 7735 3824 7738
TIME...MOT...LOC 2145Z 257DEG 36KT 3841 7731 3819 7722
$$
ADSThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 10:01 PM EDT | Special Marine Warning | LWX | 89 min | |
| May 4, 4:08 AM EDT | Gale Watch | LWX | 24 hr | |
| May 4, 4:08 AM EDT | Small Craft Advisory | LWX | 50 hr | |
| May 4, 1:48 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham, Shenandoah | 42 min |
| May 4, 1:52 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham, Shenandoah | 38 min |
| May 4, 2:15 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, City of Staunton | 24 min |
| May 4, 2:27 PM EDT | Severe Thunderstorm Warning | LWX | Page, Rockingham, Shenandoah | 48 min |
| May 4, 2:32 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, City of Waynesboro | 43 min |
| May 4, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Nelson | 48 min |
| May 4, 3:08 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Page, Rappahannock, Shenandoah, Warren | 52 min |
| May 4, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Madison | 32 min |
| May 4, 3:36 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Nelson | 39 min |
| May 4, 3:46 PM EDT | Areal Flood Warning | LWX | Page, Rockingham, Shenandoah | 9 hr |
| May 4, 3:57 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fauquier, Prince William, Rappahannock, City of Manassas, City of Manassas Park | 39 min |
| May 4, 4:00 PM EDT | Flash Flood Warning | LWX | Page, Rockingham, Shenandoah | 3 hr |
| May 4, 4:01 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William | 44 min |
| May 4, 4:08 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, City of Charlottesville | 36 min |
| May 4, 4:22 PM EDT | Special Marine Warning | LWX | 68 min | |
| May 4, 4:26 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Fauquier, Loudoun, Prince William, Stafford and 5 more | 49 min |
| May 4, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Orange, Spotsylvania | 37 min |
| May 4, 5:01 PM EDT | Special Marine Warning | LWX | 89 min | |
| May 4, 5:16 PM EDT | Special Marine Warning | LWX | 119 min | |
| May 4, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | King George | 51 min |
| May 4, 5:55 PM EDT | Special Marine Warning | LWX | 95 min | |
| May 4, 6:27 PM EDT | Special Marine Warning | LWX | 93 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.