Alert archive / Maryland / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 125, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 24, 2011, 4:44 PM EDT for Carroll County, Howard County, Maryland. It was in force for 19 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
- May 24, 2011, 4:44 PM EDT (20:44 UTC)
- Expired
- May 24, 2011, 5:03 PM EDT
- In force
- 19 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Carroll County, MD, Howard County, MD
The radar
The Sterling radar (KLWX), 65 km from the middle of the area, began a volume at 20:46 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.7 hours before the alert went out and 214 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
- 580 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 1290 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 May 23, 6:08 PM EDT, 22 hours 36 minutes earlier.
Area forecast discussion, May 23, 6:08 PM EDT, 22 hours 36 minutes before
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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 |
|---|---|---|---|---|
| May 24, 11:56 AM EDT | Small Craft Advisory | LWX | 6 hr | |
| May 24, 2:03 PM EDT | Special Weather Statement | LWX | Madison | 27 min |
| May 24, 2:28 PM EDT | Special Weather Statement | LWX | Culpeper | 32 min |
| May 24, 2:49 PM EDT | Special Weather Statement | LWX | Clarke, Loudoun | 26 min |
| May 24, 2:58 PM EDT | Special Weather Statement | LWX | Culpeper | 32 min |
| May 24, 3:03 PM EDT | Special Weather Statement | LWX | Loudoun | 27 min |
| May 24, 3:26 PM EDT | Special Weather Statement | LWX | Loudoun | 34 min |
| May 24, 3:28 PM EDT | Special Marine Warning | LWX | 62 min | |
| May 24, 4:30 PM EDT | Special Marine Warning | LWX | 31 min | |
| May 24, 3:59 PM EDT | Special Weather Statement | LWX | Charles | 31 min |
| May 24, 4:27 PM EDT | Special Weather Statement | LWX | Howard | 33 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2011Every severe thunderstorm warning in 2011
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.