Alert archive / Virginia / Flash Flood Warnings in 1999

Flash Flood Warning 10, NWS Blacksburg, VA

July 24, 1999Buckingham County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jul 24, 1999, 3:35 PM EDT for Buckingham County, Virginia. It was in force for 60 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: Jul 24, 1999, 3:35 PM EDT (19:35 UTC)
Expired: Jul 24, 1999, 4:35 PM EDT
In force: 60 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Buckingham County, VA

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.6 hours before the alert went out and 95 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: 650 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1094 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 59 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 flash flood 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 flash flood warning went out at Jul 24, 2:35 PM EDT, 1 hour earlier.

Area forecast discussion, Jul 24, 2:35 PM EDT, 1 hour before

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In the hours before

Special weather statement, Jul 24, 11:50 AM EDT, 3 hours 45 minutes before

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-
059-WVZ042>045-242200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
1150 AM EDT SAT JUL 24 1999

...ISOLATED SEVERE WEATHER IS POSSIBLE THIS AFTERNOON AND EVENING...

THUNDERSTORMS WILL CONTINUE DEVELOPING OVER THE WESTERN APPALACHIANS
AHEAD OF AN UPPER LEVEL DISTURBANCE EARLY THIS AFTERNOON...AND
ARE EXPECTED TO CONTINUE SPREADING SLOWLY EASTWARD ACROSS THE BLUE
RIDGE INTO THE PIEDMONT LATER THIS AFTERNOON.  A FEW OF THE STORMS
EARLY THIS AFTERNOON IN THE MOUNTAINS COULD APPROACH SEVERE LIMITS
WITH WIND GUSTS OVER 40 MPH AND HALF INCH DIAMETER HAIL. LATER THIS
AFTERNOON AS STORMS MOVE EAST OF THE BLUE RIDGE WHERE THE ATMOSPHERE
IS EVEN MORE UNSTABLE...ISOLATED SEVERE STORMS ARE
POSSIBLE...PRODUCING DAMAGING WINDS AND LARGE HAIL. IN
ADDITION...THE ATMOSPHERE IS VERY MOIST...SO THE POTENTIAL WILL
EXIST FOR HEAVY LOCALIZED RAINFALL.  THE GREATEST THREAT FOR SEVERE
WEATHER WILL BE BETWEEN 3:00 PM AND 9:00 PM.

STAY TUNED TO NOAA WEATHER RADIO FOR ANY ADDITIONAL INFORMATION THAT
MAY BECOME AVAILABLE LATER TODAY.

SK

Special weather statement, Jul 24, 1:45 PM EDT, 1 hour 50 minutes before

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Special weather statement, Jul 24, 1:45 PM EDT, 1 hour 50 minutes before

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Special weather statement, Jul 24, 1:45 PM EDT, 1 hour 50 minutes before

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Local storm report, Jul 24, 3:21 PM EDT, 14 minutes before

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Local storm report, Jul 24, 3:21 PM EDT, 14 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
Jul 24, 12:45 PM EDT	Flash Flood Warning	RNK	Tazewell	2 hr
Jul 24, 1:40 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Wythe	50 min
Jul 24, 2:50 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	50 min
Jul 24, 3:02 PM EDT	Severe Thunderstorm Warning	RNK	Giles	48 min
Jul 24, 3:45 PM EDT	Flash Flood Warning	RNK	Giles	90 min
Jul 24, 5:12 PM EDT	Flash Flood Warning	RNK	Giles	58 min
Jul 24, 7:41 PM EDT	Flash Flood Warning	RNK	Buckingham	119 min
Jul 23, 8:18 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	32 min
Jul 24, 1:32 PM EDT	Severe Thunderstorm Warning	RNK	Surry	48 min
Jul 24, 2:46 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	34 min
Jul 24, 3:08 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	47 min
Jul 24, 3:49 PM EDT	Severe Thunderstorm Warning	RNK	Summers	51 min

Nearby

Flash Flood Warnings in Virginia, 1999 Every flash flood 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; the sounding from the Mesonet's radiosonde archive.