Alert archive / Virginia / Flash Flood Warnings in 1996

Flash Flood Warning 39, NWS Blacksburg, VA

June 10, 1996Roanoke County, City of Salem, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 10, 1996, 8:10 AM EDT for Roanoke County, City of Salem, Virginia. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 10, 1996, 8:10 AM EDT (12:10 UTC)
Expired: Jun 10, 1996, 12:00 PM EDT
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Whole counties

Counties City of Salem, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 32 km from the middle of the area, began a volume at 12:10 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, 0.2 hours before the alert went out and 49 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: 125 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KROA 101212
FFWRNK
VAC161-770-775-101610-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
810 AM EDT MON JUN 10 1996

THE NATIONAL WEATHER SERVICE IN BLACKSBURG VA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL NOON EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWEST VIRGINIA

   ...ROANOKE COUNTY

IN SOUTHWEST VIRGINIA THE INDEPENDENT CITY OF

   ...ROANOKE (CITY)
   ...SALEM
 
AT 809 AM RADAR INDICATED SHOWERS AND THUNDERSTORMS PRODUCING VERY
HEAVY RAIN OVER AND SOUTH OF ROANOKE COUNTY...TRACKING NORTH.  THE
GROUND HAS LITTLE ABILITY TO HOLD ADDITIONAL RAINFALL...SO ALL WILL
RUNOFF RESULTING IN FLOODING OF  ROADS...STREAMS...CREEKS AND SMALL
RIVERS.
 
IF FLASH FLOODING IS OBSERVED...ACT QUICKLY.  MOVE TO ESCAPE FLOOD
WATERS.  DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS
RISING.

NOGUEIRA

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 Jun 10, 2:19 AM EDT, 5 hours 51 minutes earlier.

Area forecast discussion, Jun 10, 2:19 AM EDT, 5 hours 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
215 AM EDT MON JUN 10 1996

RECS...

AM HESITANT TO LET THE FFA/S DIE.  STL ISSUING WARNINGS...AND SM
AREAS STILL GETTING SOME PRETTY GOOD PCPN.

DISC...

CRNT KFCX RADAR WHOWS TSTMS CONT TO MOVE S TO N...MAINLY FM
FOOTHILLS OF NC (IT IS ALMOST OUT OF THERE) ACRS NEW RVR VLY TO
GREENBRIER VLY.  THIS WAS HARDEST HIT AREA YEST/ERLY TNT... AND
THERE ARE STILL A CPL OF FFW/S IN EFFECT ATTM.  LAST FRAME OF TIME
LAPSE HINTS THAT MORE CD BE DVLPING ACRS WILKES/YADKIN.  I CAN ADM
W/ UPDATE OF KFCX RADAR IN A FEW MINUTES IF ANY NWSFO/S ARE
INTERESTED.

MDLS IN GNRL AGREEMENT ABT SLO MVMNT OF STACKED SYSTEM FM NR
BOOTHEEL OF MO TO CNTRL IL THIS FCST PD.  MDLS HAVING HARDER TIME
AGREEING ON MOISTURE FIELDS.  ETA/AVN BOTH INDICATE SM WRAP ARND
DRYING...AT LEAST FOR TMRW.  NGM NOT AS PRONOUNCED W/ THIS AT ALL.
FM LOOKING AT CLD TRENDS ON SAT PICS...THINK THE ETA HAS THE RIGHT
IDEA.

THEREFORE...FM ETA GRIDDS...RATHER SHARP GRADIENT OF H85 THTA-E
PRESENT ACRS RNK CWA LATE TDY...W/ RIDGE OF HIGHEST VALUES SHIFTING
MORE TO THE PIEDMONT FOR THE WARMEST PART OF THE DAY.  HAVE JUST
READY SWODY1 DISC...AND AGREE W/ THEIR THINKING.  FEEL THAT THERE WL
BE SCT SHWRS/TSTMS WRN HALF FA...BUT OVERALL TDY WL BE A GOOD CHC TO
DRY OUT WHILE MORE THREATENING ACTIVITY SHIFTS TO THE E.

MOISTURE WL REBOUND FOR TUES...AND IT APPRS THAT CHCS OF PCPN WL BE
MORE UNIFORM FOR FA.  INSTABILITY INDICES ONCE AGAIN FAVOR TSTMS...
IT WL BE NICE TO GET OUT THIS PTN.

ROA 80/62/82/60 3242

DESROSIERS

In the hours before

Special weather statement, Jun 10, 6:33 AM EDT, 1 hour 37 minutes before

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-
059-WVZ042>045-111200-

SEVERE WEATHER POTENTIAL OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
630 AM EDT MON JUN 10 1996

...THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS TODAY ACROSS
NORTHWESTERN NORTH CAROLINA...SOUTHWESTERN VIRGINIA AND SOUTHEASTERN
WEST VIRGINIA...

UNSETTLED WEATHER WILL CONTINUE ACROSS THE AREA TODAY AS A SLOW
MOVING LOW PRESSURE CENTER DRIFT NORTH ACROSS ILLINOIS.  LOW LEVEL
MOISTURE WILL REMAIN ABUNDANT ACROSS THE AREA...WITH DEEP MOISTURE
ACROSS THE PIEDMONT OF VIRGINIA AND NORTH CAROLINA.

CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS
TODAY AND EARLY TONIGHT.  PERIODS OF SUN FROM SOUTHEAST WEST
VIRGINIA...FAR SOUTHWEST VIRGINIA...AND NORTHWEST NORTH CAROLINA
WILL ALLOW THE ATMOSPHERE TO BECOME INCREASINGLY UNSTABLE.  OVER THE
PIEDMONT...THE LOW LEVEL MOISTURE WILL CONTRIBUTE TO AN UNSTABLE
ATMOSPHERE.

IN ADDITION TO THE POTENTIAL FOR DAMAGING THUNDERSTORMS...STORMS
THAT DO FORM WILL TRACK VERY SLOWLY DUE TO THE WEAK UPPER LEVEL WIND
FLOW.  RAINFALL FROM SOME OF THE STORMS MAY BE LOCALLY VERY HEAVY
...WITH THE POTENTIAL TO CAUSE PONDING OF WATER ON ROADS AND POOR
DRAINAGE AREAS...AND EVEN LOCALIZED FLASH FLOODING.  THIS COULD BE
ESPECIALLY DANGEROUS IN AREAS WHICH HAVE ALREADY RECEIVED HEAVY
RAINS.

WITH THE POSSIBILITY OF SEVERE THUNDERSTORMS AND LOCALIZED FLOODING
...SKYWARN SPOTTER ACTIVATION IS PXOSSIBLE TODAY AND TONIGHT.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL NEWS MEDIA FOR
ADDITIONAL INFORMATION FROM THE NATIONAL WEATHER SERVICE.

DESROSIERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 12:27 AM EDT	Flash Flood Warning	RNK	Montgomery	118 min
Jun 10, 2:15 AM EDT	Flash Flood Warning	RNK	Floyd, Montgomery	3 hr
Jun 10, 8:10 AM EDT	Flash Flood Warning	RNK	City of Roanoke	4 hr
Jun 10, 8:15 AM EDT	Severe Thunderstorm Warning	RNK	Henry	65 min
Jun 10, 8:19 AM EDT	Tornado Warning	RNK	Henry	31 min
Jun 10, 8:28 AM EDT	Tornado Warning	RNK	Pittsylvania	47 min
Jun 10, 8:43 AM EDT	Flash Flood Warning	RNK	Henry, City of Martinsville	3 hr
Jun 10, 9:13 AM EDT	Tornado Warning	RNK	Pittsylvania	47 min
Jun 10, 10:01 AM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	34 min
Jun 10, 10:04 AM EDT	Severe Thunderstorm Warning	RNK	Campbell	61 min
Jun 10, 10:16 AM EDT	Tornado Warning	RNK	Campbell	59 min

Nearby

Flash Flood Warnings in Virginia, 1996 Every flash flood warning in 1996

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.