Alert archive / North Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 138, NWS Blacksburg, VA

May 25, 1998Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 25, 1998, 5:02 PM EDT for Caswell County, North Carolina. It was in force for 48 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 25, 1998, 5:02 PM EDT (21:02 UTC)
Expired: May 25, 1998, 5:50 PM EDT
In force: 48 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Caswell County, NC

The radar

The Roanoke radar (KFCX), 109 km from the middle of the area, began a volume at 20:44 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 25, 4:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.0 hours before the alert went out and 62 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 474 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 May 25, 2:45 PM EDT, 2 hours 17 minutes earlier.

Area forecast discussion, May 25, 2:45 PM EDT, 2 hours 17 minutes before

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In the hours before

Special weather statement, May 25, 1:18 PM EDT, 3 hours 44 minutes before

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Local storm report, May 25, 3:40 PM EDT, 1 hour 22 minutes before

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Local storm report, May 25, 3:40 PM EDT, 1 hour 22 minutes before

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Local storm report, May 25, 4:20 PM EDT, 42 minutes before

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Local storm report, May 25, 4:20 PM EDT, 42 minutes before

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Special weather statement, May 25, 4:35 PM EDT, 27 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 8:22 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt	33 min
May 24, 9:28 PM EDT	Severe Thunderstorm Warning	RNK	Tazewell	47 min
May 24, 10:01 PM EDT	Severe Thunderstorm Warning	RNK	Giles	49 min
May 24, 10:26 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	34 min
May 24, 10:36 PM EDT	Severe Thunderstorm Warning	RNK	Smyth	34 min
May 24, 11:01 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery, Roanoke, City of Roanoke, City of Salem	49 min
May 24, 11:01 PM EDT	Severe Thunderstorm Warning	RNK	City of Radford	49 min
May 24, 11:18 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	32 min
May 25, 5:08 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	32 min
May 25, 2:51 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	49 min
May 25, 3:25 PM EDT	Severe Thunderstorm Warning	RNK	Surry	50 min
May 25, 3:46 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	64 min
May 25, 4:14 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	46 min
May 24, 8:52 PM EDT	Severe Thunderstorm Warning	RNK	Mercer	48 min
May 24, 9:51 PM EDT	Severe Thunderstorm Warning	RNK	Monroe	34 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1998 Every severe thunderstorm warning in 1998

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.