Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 49, NWS Blacksburg, VA

May 4, 1998Appomattox County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 4, 1998, 2:57 PM EDT for Appomattox County, Virginia. It was in force for 18 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 4, 1998, 2:57 PM EDT (18:57 UTC)
Expired: May 4, 1998, 3:15 PM EDT
In force: 18 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Appomattox County, VA

The radar

The Roanoke radar (KFCX), 135 km from the middle of the area, began a volume at 18:58 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

Roanoke, VA (KRNK), launched 12:00Z, 7.0 hours before the alert went out and 64 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 914 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

834 
WUUS01 KRNK 041858 RRA
SVRRNK
VAC011-041915-

BULLETIN--IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
257 PM EDT MON MAY 4 1998

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN APPOMATTOX COUNTY IN CENTRAL VIRGINIA.

* UNTIL 315 PM EDT.

* AT 256 PM EDT... BLACKSBURG DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 28 MILES EAST SOUTHEAST OF LYNCHBURG OR IN THE
  VICINITY OF PAMPLIN CITY MOVING EAST NORTHEAST AT 25 MPH.

* THIS STORM IS EXPECTED TO REMAIN RURAL...

<< CALL TO ACTION >> THIS STORM HAS A HISTORY OF LARGE HAIL. GO
INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS

.END/DD

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 4, 2:30 PM EDT, 27 minutes earlier.

Area forecast discussion, May 4, 2:30 PM EDT, 27 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
230 PM EDT MON MAY 4 1998

DISC...

WX BEGINNING TO CRANK HERE...SO THIS WL BE VERY SHORT.  18Z RNK
SOUNDING HAD A LI OF MINUS TWO AND A CAPE OF 600...NOT EYEPOPPING
...BUT THE DRYING JUST ABOVE 700 MB SURE IS  H85/H5 TEMP DIFF OF 27
DEGS IS ALSO FVRBL. HAVE JUST GOTTEN REPORTS OF DIME SIZE HAIL IN
WYTHE COUNTY...NOT QUITE UNDER CORE OF STORM THAT MIGHT NOT BE THE
BIGGEST HAIL AND STORM IS STILL ONGOING.

QUICK LUK AT GSO SOUNDING IS EVEN MORE IMPRESSIVE.

BEEN CONCENTRATING A LOT ON EVOLVING WX AND HAVE JUST A FEW THOTS ON
FCST.  XPCT CRNT EVEN TO CARRY WELL INTO THE EVE AGAIN...SPCLY ACRS
PIEDMONT.  BELIEVE FOG WL AGAIN DVLP TWD MORG.

TMRW HOLDS BEGINS A SLOW TREND FOR IMPROVEMENT...THO W/ COLD POOL
STL HANGING ARND BELIEVE THERE WL BE SCTD TSTMS AGAIN IN THE AFTN.
AGREE W/ WBC ABT DRY SKIES TUES NGT AND WED.  NGM FASTER IN BRINGING
THE NEXT S/WV ACRS FA... IF THAT VERIFIES THERE CD BE A FEW MORE
CLDS THN THE GDNCE INDICATES...AND PHPS EVEN A LTL RAFL LATE WED IN
FAR WRN SXNS.

NOT SURE ABT THOSE FWC HIGHS WED...

ROA 48/70/50/77 630- (HIGH 1ST PD POPS FOR EVENING)
LYH 51/72/51/77 6300
DAN 54/74/53/80 7300
BLF 45/63/50/73 5303
RNK 46/67/50/75 6301

DESROSIERS

In the hours before

Local storm report, May 4, 2:15 PM EDT, 42 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
215 PM EDT MON MAY 4 1998

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

200 PM     CROCKETT                  VA   0.75 INCH HAIL
05/04/98   WYTHE                          COVERED THE GROUND...
                                          REPORTED BY SPOTTER

DESROSIERS

Local storm report, May 4, 2:15 PM EDT, 42 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
215 PM EDT MON MAY 4 1998

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

200 PM     CROCKETT                  VA   0.75 INCH HAIL
05/04/98   WYTHE                          COVERED THE GROUND...
                                          REPORTED BY SPOTTER

DESROSIERS

Local storm report, May 4, 2:45 PM EDT, 12 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
245 PM EDT MON MAY 4 1998

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

200 PM     2 N MARTINSVILLE          VA   0.88 INCH HAIL
05/04/98   HENRY                          NICKEL TO DIME SIZE
                                          HAIL REPORTED BY
                                          SPOTTER.
DESROSIERS

Local storm report, May 4, 2:45 PM EDT, 12 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
245 PM EDT MON MAY 4 1998

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

200 PM     2 N MARTINSVILLE          VA   0.88 INCH HAIL
05/04/98   HENRY                          NICKEL TO DIME SIZE
                                          HAIL REPORTED BY
                                          SPOTTER.
DESROSIERS

Local storm report, May 4, 2:50 PM EDT, 7 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
250 PM EDT MON MAY 4 1998

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

240 PM     RED HOUSE                 VA   0.75 INCH HAIL
05/04/98   CHARLOTTE                      DIME SIZE HAIL

DESROSIERS

Local storm report, May 4, 2:50 PM EDT, 7 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
250 PM EDT MON MAY 4 1998

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

240 PM     RED HOUSE                 VA   0.75 INCH HAIL
05/04/98   CHARLOTTE                      DIME SIZE HAIL

DESROSIERS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 8:04 PM EDT	Severe Thunderstorm Warning	RNK	Wythe	46 min
May 4, 1:39 PM EDT	Severe Thunderstorm Warning	RNK	Wythe	51 min
May 4, 1:58 PM EDT	Severe Thunderstorm Warning	RNK	Henry	32 min
May 4, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	33 min
May 4, 3:23 PM EDT	Severe Thunderstorm Warning	RNK	Buckingham	32 min
May 4, 3:46 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery, City of Radford	49 min
May 4, 4:31 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	34 min
May 4, 4:50 PM EDT	Severe Thunderstorm Warning	RNK	Roanoke, City of Roanoke	50 min
May 4, 4:50 PM EDT	Severe Thunderstorm Warning	RNK	City of Salem	50 min
May 4, 5:42 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	33 min
May 4, 6:09 PM EDT	Severe Thunderstorm Warning	RNK	Roanoke, City of Roanoke	51 min
May 4, 7:03 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	42 min
May 4, 7:06 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.