Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 255, NWS Blacksburg, VA

July 22, 1998Bedford County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 22, 1998, 3:36 PM EDT for Bedford County, Virginia. It was in force for 34 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: Jul 22, 1998, 3:36 PM EDT (19:36 UTC)
Expired: Jul 22, 1998, 4:10 PM EDT
In force: 34 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Bedford County, VA

The radar

The Roanoke radar (KFCX), 74 km from the middle of the area, began a volume at 19:24 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
Jul 22, 3:38 PM EDT	Thunderstorm Wind	Forest, 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, 7.6 hours before the alert went out and 13 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: 219 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -63 m²/s²
0-3 km storm-relative helicity: 14 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 Jul 22, 2:32 PM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 22, 2:32 PM EDT, 1 hour 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
155 PM EDT TUE JUL 21 1998

SHRA/TS MOVING ACRS WRN FA ATTM. SHUD CONTINUE OVR MTNS RMDR AFTN
AND LAST INTO THE EVE OVR PIEDMONT. ONCE GONE NEXT PRBLM IS IF/WHEN
MCS AFFECTS FA OVRNGT. FNT SAGS S TO JUST N OF FA BY 00Z FRI SO MORE
TS/SHRA THU AFTN/EVE. FNT MOVS THRU FRI WITH RTRN TO MORE NML
TEMPS/CHC ISOLD ACTIVITY OVER PIEDMONT INTO SAT.

ROA 68/92/68/90 3441
RNK 65/87/64/86 3441
LYH 70/93/71/90 3442
DAN 73/95/73/93 3332
BLF 66/86/64/82 3442
LWB 63/84/62/80 3441
BOO 65/85/64/83 3333

MG

In the hours before

Local storm report, Jul 22, 3:30 PM EDT, 6 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
330 PM EDT WED JUL 22 1998

TIME (EDT) .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

315 PM     SALEM                     VA   WIND DAMAGE
07/22/98   ROANOKE                        POWER LINES DOWN AND TREES
                                          THROUGH ROOF OF A HOUSE.
                                          REPORTED BY SALEM FIRE DEPART-
                                          MENT.

322 PM    BLACKSBURG                 VA   60 MPH WIND GUST
07/22/98  MONTGOMERY                      RECORDED AT THE BLACKSBURG
                                          NATIONAL WEATHER SERVICE

SJK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 3:25 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	35 min
Jul 22, 4:06 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	34 min
Jul 22, 4:13 PM EDT	Severe Thunderstorm Warning	RNK	Amherst	32 min
Jul 22, 4:15 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania, City of Danville	35 min
Jul 22, 4:20 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox	35 min
Jul 22, 5:06 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	34 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; radar from the NEXRAD Level II archive.