Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 31, NWS Blacksburg, VA

May 7, 1999Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 7, 1999, 6:51 PM EDT for Yadkin County, North Carolina. 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: May 7, 1999, 6:51 PM EDT (22:51 UTC)
Expired: May 7, 1999, 7:25 PM EDT
In force: 34 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Yadkin County, NC

What was reported inside it

Time	Report	Where	Remark
May 7, 7:00 PM EDT	Hail 1	Boonville, NC

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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.9 hours before the alert went out and 69 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: 26 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 10 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 7, 3:05 PM EDT, 3 hours 46 minutes earlier.

Area forecast discussion, May 7, 3:05 PM EDT, 3 hours 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
305 PM EDT FRI MAY 7 1999

AWIPS VISIBILE SAT LOOP INDICATED SOME SUNSHINE ACROSS PORTION OF FA.
REGION RADAR LOOP AT 18Z DISPLAYED SOME DEVELOPMENT OF SHOWERS
AND THUNDERSTORMS ACROSS SW NC AND NORTHERN GA DURING THE PAST FEW
HOURS. THIS AREA LINES UP WELL WITH BETTER DEWPOINTS. 12Z MODEL RUNS
WERE SIMILIAR WITH A STRONG VORT MAX (IDENTIFY ON WATER VAPOR)
ROTATING AROUND THE BASE OF THE UPPER LEVEL TROUGH ACROSS FA TONIGHT
INTO SAT. AWIPS 5H COMBO DISPLAYED UPPER TROF SLIDING EAST DURING
THE PERIOD. SFC COLD FRONT SHOULD PUNCH EAST ACROSS CWA. DRIER AIR
NOTED BEHIND THE FRONT (CLEARLY SEEN WITH DEWPOINTS IN THE 40S)
SHOULD SLIDE EAST. NICE SATURDAY SETTING UP FOR RNK CWA. HAVE A GUD
NIGHT.

.RNK...
VA...NONE.
NC...NONE.
WV...NONE.

KK

In the hours before

Special weather statement, May 7, 4:16 PM EDT, 2 hours 35 minutes before

NCZ001>005-018>020-VAZ007-009>020-022>024-032>034-043-044-
WVZ042>045-
080615-

THUNDERSTORM POTENTIAL OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
416 PM EDT FRI MAY 7 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON
AND THIS EVENING FOR THE AREA WEST OF A LINE FROM LEXINGTON IN
ROCKBRIDGE COUNTY TO REIDSVILLE IN ROCKINGHAM COUNTY NORTH CAROLINA.

STRONG TO SEVERE THUNDERSTORMS IN EASTERN TENNESSEE AND FAR WESTERN
NORTH CAROLINA WILL MOVE NORTHEAST INTO THE SLIGHT RISK AREA. THE
ATMOSPHERE HAS BECOME UNSTABLE ACROSS THIS AREA AND SOME OF
THUNDERSTORMS LATE THIS AFTERNOON AND THIS EVENING COULD BECOME
SEVERE. THE MAIN THREAT FROM SEVERE THUNDERSTORMS APPEARS TO BE
HAIL UP TO QUARTER SIZE AND WIND GUSTS TO 70 MPH.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR
LATER STATEMENTS...WATCHES OR WARNINGS.

MTE

Local storm report, May 7, 5:46 PM EDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VIRGINIA
0546 PM EDT FRI MAY 07 1999

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

0450 PM    GROSECLOSE                VA   .75 INCH HAIL
05/07/99   SMYTH                          DIME SIZE HAIL REPORTED BY
                                          SPOTTER NEAR I-81

0515 PM    VOLNEY                    VA   .75 INCH HAIL
05/07/99   GRAYSON                        DIME SIZE HAIL REPORTED AT
                                          GRAYSON HIGHLAND STATE PARK

SK

Local storm report, May 7, 5:46 PM EDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VIRGINIA
0546 PM EDT FRI MAY 07 1999

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

0450 PM    GROSECLOSE                VA   .75 INCH HAIL
05/07/99   SMYTH                          DIME SIZE HAIL REPORTED BY
                                          SPOTTER NEAR I-81

0515 PM    VOLNEY                    VA   .75 INCH HAIL
05/07/99   GRAYSON                        DIME SIZE HAIL REPORTED AT
                                          GRAYSON HIGHLAND STATE PARK

SK

Local storm report, May 7, 6:47 PM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VIRGINIA
0645 PMEDT FRI MAY 07 1999

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

0551 PM    3S EGGLESTON              VA   .75 INCH HAIL
05/07/99   GILES                          DIME SIZE HAIL REPORTED BY
                                          SPOTTER

0615 PM    3W DUBLIN                 VA   .75 TO 1.00 INCH HAIL
05/07/99   PULASKI                        DIME TO QUARTER SIZE HAIL
                                          REPORTED BY SPOTTER

0615 PM    3S EGGLESTON              VA   1.00 INCH HAIL
05/07/99   GILES                          QUARTER SIZE HAIL

0623 PM    PEMBROKE                  VA   POWER LINES DOWN
05/07/99   GILES

0635 PM    LAUREL RIDGE              VA   1.00 INCH HAIL
05/07/99   MONTGOMERY                     QUARTER SIZE HAIL

BS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 4:38 PM EDT	Severe Thunderstorm Warning	RNK	Smyth	67 min
May 7, 5:02 PM EDT	Severe Thunderstorm Warning	RNK	Wythe	33 min
May 7, 5:12 PM EDT	Severe Thunderstorm Warning	RNK	Bland	33 min
May 7, 5:16 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	34 min
May 7, 5:45 PM EDT	Severe Thunderstorm Warning	RNK	Giles	50 min
May 7, 6:08 PM EDT	Severe Thunderstorm Warning	RNK	Pulaski	37 min
May 7, 6:23 PM EDT	Severe Thunderstorm Warning	RNK	Giles, Montgomery	37 min
May 7, 6:38 PM EDT	Severe Thunderstorm Warning	RNK	Craig	52 min
May 7, 7:18 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	37 min
May 7, 7:41 PM EDT	Severe Thunderstorm Warning	RNK	Henry	34 min
May 7, 7:51 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	49 min
May 7, 7:52 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	33 min
May 7, 4:43 PM EDT	Severe Thunderstorm Warning	RNK	Ashe	37 min
May 7, 7:28 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	67 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1999 Every severe thunderstorm warning in 1999

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.