Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 122, NWS Blacksburg, VA

May 24, 1998Alleghany County, City of Covington, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 24, 1998, 7:39 PM EDT for Alleghany County, City of Covington, Virginia. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 24, 1998, 7:39 PM EDT (23:39 UTC)
Expired: May 24, 1998, 8:10 PM EDT
In force: 31 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

Counties Alleghany County, VA, City of Covington, VA

What was reported inside it

Time	Report	Where	Remark
May 24, 7:50 PM EDT	Hail 0.88	Callaghan, VA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 11.7 hours before the alert went out and 79 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: 41 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 582 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 24, 2:20 PM EDT, 5 hours 19 minutes earlier.

Area forecast discussion, May 24, 2:20 PM EDT, 5 hours 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
220 PM EDT SUN MAY 24 1998

RECOMMENDATIONS...
KEEP POPS IN FOR TONIGHT. LOWER MOS HIGHS FOR MEMORIAL DAY.

DISCUSSION...
SAT PIX SHWD PLENTY OF CLOUDS ACRS CWA. HOWEVER...THERE HAVE BEEN A
FEW BREAKS. KFCX 88D AT 1725Z HAD A COUPLE OF SHOWERS ACRS THE SCOPE.
A FEW THUNDERSTORMS NOTED ACRS NRN WV. ONE CELL SOUTH OF EKN HAD
MOVEMENT OF 270 AT 29. DIALING UP ILN 88D SHWD SOME THUNDERSTORMS IN
OH WITH COVERAGE AND INTENSITY DIMINISHING DURG THE LAST TWO HOURS.
SFC CHRT PLACES LOW CENTER NEAR LAF WITH WARM FRNT EXTENDING EAST
ACRS ERN KY/ERN TN THEN SOUTH TO SC. A WEAK HIGH WAS ANCHORED ACRS
VA/NC. INTERESTING TO NOTE THE H5 VORTLOBE AXIS ACCORDING TO THE
MODELS EXITS FA BY 00Z. ETA PROGS HIGH CAPES ARD 1,000 TO 2500
ACRS FA. SOME LOW LVL CVRGNC AND LIS OF MINUS 4 OR SO WOULD SUPPORT
MENTION OF SHWRS/THUNDERSTORMS IN FORECAST. CD HAVE ANOTHER MCS
DEVLOP AND DROP SE IN VCNT OF FNTL BNDY. SFC LOW PROG TO LIGT
NORTHARD AND THUS EVENTUALLY PUSH FNT NORTH OF FA. ANYHOW...
FOR TONIGHT AND MEMORIAL DAY...MOSTLY CLOUDY WITH SHOWERS AND
THUNDERSTORMS. LOWS WILL VARY FRM MID 50S TO LOWER 60S. HIGHS WL RNG
FROM MID 70S TO LOWER 80S.
A FEW NUMBERS....
ROA 58/79/60/80 4334
LYH 59/80/60/82 4234
DAN 63/82/64/84 4234
BLF 57/75/59/77 5344
RNK 58/76/58/79 5333
KK

In the hours before

Special weather statement, May 24, 2:18 PM EDT, 5 hours 21 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, 5:09 AM EDT	Severe Thunderstorm Warning	RNK	Wythe	51 min
May 24, 5:43 AM EDT	Severe Thunderstorm Warning	RNK	Carroll, City of Galax	32 min
May 24, 6:40 AM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	30 min

Nearby

Severe Thunderstorm Warnings in Virginia, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.