Alert archive / Maryland / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 183, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 1, 2018, 10:19 PM EDT for Baltimore County, Harford County, Maryland. It was in force for 56 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
- Aug 1, 2018, 10:19 PM EDT (02:19 UTC)
- Expired
- Aug 1, 2018, 11:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Baltimore County, MD, Harford County, MD
The radar
The Sterling radar (KLWX), 105 km from the middle of the area, began a volume at 02:20 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 2.3 hours before the alert went out and 101 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
- 883 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 4.2
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 Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 9:43 PM EDT, 36 minutes earlier.
Area forecast discussion, Aug 1, 9:43 PM EDT, 36 minutes before
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Local storm report, Aug 1, 7:36 PM EDT, 2 hours 43 minutes before
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</html>Local storm report, Aug 1, 8:17 PM EDT, 2 hours 2 minutes before
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<div class="status" id="status">Temporary Notice</div>
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</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 9:40 PM EDT | Special Marine Warning | LWX | 95 min | |
| Aug 1, 10:17 PM EDT | Special Marine Warning | LWX | 88 min | |
| Aug 1, 11:05 PM EDT | Areal Flood Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William, City of Fairfax | 4 hr |
| Aug 1, 11:05 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William | 25 min |
| Aug 1, 11:14 PM EDT | Special Marine Warning | LWX | 42 min | |
| Aug 1, 11:39 PM EDT | Special Marine Warning | LWX | 18 min | |
| Aug 2, 3:35 AM EDT | Areal Flood Warning | LWX | Prince William | 5 hr |
| Aug 2, 11:24 AM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Greene, Madison, Orange | 51 min |
| Aug 2, 12:08 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Madison, Orange | 52 min |
| Aug 2, 12:32 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fauquier, Orange | 27 min |
| Aug 2, 12:36 PM EDT | Tornado Warning | LWX | Culpeper, Fauquier, Orange, Spotsylvania, Stafford | 24 min |
| Aug 2, 12:56 PM EDT | Tornado Warning | LWX | Culpeper, Fauquier, Spotsylvania, Stafford | 13 min |
| Aug 2, 1:54 PM EDT | Special Marine Warning | LWX | 96 min | |
| Aug 2, 1:55 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Prince William | 50 min |
| Aug 2, 2:22 PM EDT | Areal Flood Warning | LWX | Fairfax, Prince William | 5 hr |
| Aug 2, 2:26 PM EDT | Areal Flood Warning | LWX | Fauquier | 15 hr |
| Aug 2, 2:51 PM EDT | Areal Flood Warning | LWX | Arlington, Fairfax, City of Alexandria, City of Falls Church | 5 hr |
| Aug 2, 3:09 PM EDT | Special Marine Warning | LWX | 96 min | |
| Aug 2, 3:29 PM EDT | Special Marine Warning | LWX | 37 min | |
| Aug 2, 3:47 PM EDT | Special Marine Warning | LWX | 88 min | |
| Aug 2, 4:40 PM EDT | Special Marine Warning | LWX | 95 min | |
| Aug 2, 5:11 PM EDT | Special Marine Warning | LWX | 68 min | |
| Aug 2, 5:23 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Rockingham, City of Harrisonburg | 52 min |
| Aug 2, 5:45 PM EDT | Areal Flood Warning | LWX | Augusta, Rockingham, City of Harrisonburg, City of Staunton | 112 min |
| Aug 2, 6:10 PM EDT | Severe Thunderstorm Warning | LWX | Greene, Madison, Page, Rockingham | 17 min |
| Aug 2, 6:42 PM EDT | Areal Flood Warning | LWX | Greene, Rockingham, City of Harrisonburg | 5 hr |
| Aug 2, 7:01 PM EDT | Areal Flood Warning | LWX | Albemarle, Augusta, Nelson, City of Waynesboro | 2 hr |
| Aug 2, 7:03 PM EDT | Areal Flood Warning | LWX | Fauquier, Madison, Page, Rappahannock, Warren | 6 hr |
| Aug 2, 7:24 PM EDT | Flash Flood Warning | LWX | Greene, Madison, Page, Rappahannock, Rockingham | 78 min |
| Aug 1, 11:00 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford, City of Baltimore | 3 hr |
| Aug 1, 11:33 PM EDT | Areal Flood Warning | LWX | Carroll, Howard, Montgomery | 108 min |
| Aug 2, 3:03 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Prince George's | 42 min |
| Aug 2, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 35 min |
| Aug 2, 6:25 PM EDT | River Flood Watch | LWX | Washington | 20 hr |
| Aug 2, 7:00 PM EDT | River Flood Warning | LWX | Washington | 8 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2018Every severe thunderstorm warning in 2018
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.