Alert archive / Virginia / Flash Flood Warnings in 2006

Flash Flood Warning 11, NWS Baltimore/Washington

June 19, 2006Fairfax County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 19, 2006, 6:42 PM EDT for Fairfax County, Virginia. It was in force for 3 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 19, 2006, 6:42 PM EDT (22:42 UTC)
Expired
Jun 19, 2006, 9:45 PM EDT
In force
3 hr
Issued by
NWS Baltimore/Washington
Area
Counties, with a storm outline in the text

County Fairfax County, VA

The radar

The Sterling radar (KLWX), 24 km from the middle of the area, began a volume at 22:42 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.7 hours before the alert went out and 124 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-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2006-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2006-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1462 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at Jun 19, 2:51 PM EDT, 3 hours 51 minutes earlier.

Area forecast discussion, Jun 19, 2:51 PM EDT, 3 hours 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
251 PM EDT MON JUN 19 2006

.SHORT TERM /TONIGHT THROUGH TUESDAY/...
LEE TROF OVR BLURDG ATTM. CDFNT ON WRN FRINGE OF CWFA. MOST VIGOROUS
CNVCTN OCCRG IN THE FORMER ATTM. INSTBLTY NOT ALL THAT GREAT...BUT
ENVIRONMENT IN BALT-DC CRRDR WAS RECEIVING FULL ALBEIT HAZY SUN
ERLR...SO STILL OPPORTUNITY FOR INTENSIFICATION.

TIMING OF CDFNT WUD PUT IT THRU METRO AREAS 23-00Z...AND TO ERN SHR
AOB 02Z. ONGOING TSRA IAD-FDK SHUD BE E OF CWFA BY START OF VALID
PD. THUS...CHC POPS DUE TO CVRG FOR THE EVE. SINCE WNDS TURN WNW
POST FROPA...WL CURTAIL MOST POPS BHD CDFNT.

H5 TROF TO SWING THRU TMRW...BUT W/ WNW FLOW CONTG AT SFC. SHUD SEE
ADDTL CLDCVR...BUT DONT THINK RISK OF RAFL ENUF TO WARRANT A POP
MNTN.
&&

.LONG TERM /TUESDAY NIGHT THROUGH MONDAY/...
HIGH PRES BLDS INTO THE RGN DURG THE ERLY PART OF THE XTND BRINGING
TEMPS TUE NGT 65-70 E OF THE MTNS...60-65 W...THEN IN 80S ON WED.
SUB TROP HIGH OVR GULF STATES BCMG MORE INFUENTIAL ON WED NGT
CAUSING RISING DWPTS AND OVRNGT LOWS...BUT STILL NOT INTO OPPRESSIVE
LVLS.

SUMMER BEGINS ON WED...AND NO DOUBT TEMPS IN RMDR OF XTND WL BE
SUMMERY...ALTHO NOT SUCH THAT REQUIRES HT ADVRYS. SHORT WVS RIPPLE
THRU THE RLTVLY ZNL FLOW ALONG 40N...WHICH WL KEEP DAYTIME TEMPS
NEAR CLIMO NORMS. WEVE GOT A LOT OF LOW CHC POPS IN THE 2ND HALF OF
THE XTND...BUT I THINK IT WL BE DRY THE MAJORITY OF THE TIME. MAN
PROGS/GFS DEPICT A NDRY JUST N OF THE AREA FRI-MON...IT THIS IS
INDEED WHAT HAPPENS THIS WOULD PROVIDE A FOCUS FOR CNVCTN.
&&

.AVIATION...
LCL IFR VSBYS/MVFR CIGS IN TSRA TAFTN DC-BALT CRRDR...OTRW VFR CONDS
XPCTD FOR REST OF TDA. 3-5SM BR PSBL LT TNGT/PREDAWN DUE TO MOIST
GRND FM RECENT RAINS COMBINED W/ LGT FLOW OVNGT AND DEWPTS STILL IN
THE 60S.
&&

.MARINE...
WNDS APPR BLO SCA LVL THRU THE AFTN. HIER WND RISK TAFTN/TNGT WL
BE CONFINED TO TSRA...AND THUS WL GO THE SMW RTE W/ LCLLY HIER
WNDS/WVS/LTNG STRIKES.

NW FLOW TMRW...BUT WARM WATER TEMPS WL INHIBIT MIXING A BIT. FCST
WNDS AOB 15 KT.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...NONE.
&&

SHORT TERM/AVIATION/MARINE...HTS
LONG TERM...WOODY
Hazardous weather outlook, Jun 19, 12:28 PM EDT, 6 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1228 PM EDT MON JUN 19 2006

ANZ530>537-DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-
025>031-036>042-050>057-WVZ048>055-201000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
DISTRICT OF COLUMBIA-ALLEGANY-WASHINGTON-FREDERICK MD-CARROLL-
NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-HIGHLAND-
AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-
NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN-
ORANGE-CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-GRANT-MINERAL-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-
PENDLETON-HARDY-
1228 PM EDT MON JUN 19 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE
EASTERN SHORE INCLUDING THE CHESAPEAKE BAY AND EAST OF GARRETT
COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA...
WASHINGTON DC AND THE TIDAL POTOMAC RIVER.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A BROKEN LINE OF SHOWERS AND THUNDERSTORMS WILL MOVE EAST INTO THE
MID ATLANTIC REGION THE AFTERNOON AND EVENING. A FEW OF THE STORMS
COULD BECOME SEVERE AS AN UPPER LEVEL DISTURBANCE WILL COMBINE WITH
THE MODERATELY UNSTABLE AIRMASS IN PLACE. DAMAGING WIND GUSTS WILL
BE POSSIBLE WITH ANY SEVERE STORMS THAT DEVELOP. THE AREA OF
GREATEST CONCERN WILL BE NORTH OF HARRISONBURG...DISTRICT OF
COLUMBIA...AND ANNAPOLIS.

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE MARYLAND PORTION OF
THE CHESAPEAKE BAY TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON.

HTS

In the hours before

Special weather statement, Jun 19, 12:44 PM EDT, 5 hours 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1244 PM EDT MON JUN 19 2006

DCZ001-MDZ002>007-009>011-013-014-VAZ021-026>031-040>042-051>054-
WVZ048>055-192245-
DISTRICT OF COLUMBIA-ALLEGANY-WASHINGTON-FREDERICK MD-CARROLL-
NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-HIGHLAND-ROCKINGHAM-SHENANDOAH-
FREDERICK VA-PAGE-WARREN-CLARKE-RAPPAHANNOCK-FAUQUIER-LOUDOUN-
CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-GRANT-MINERAL-HAMPSHIRE-MORGAN-
BERKELEY-JEFFERSON-PENDLETON-HARDY-
INCLUDING THE CITIES OF...WASHINGTON...CUMBERLAND...HAGERSTOWN...
FREDERICK...WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...
ANNAPOLIS...HARRISONBURG...WINCHESTER...FRONT ROYAL...LEESBURG...
CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...
FALLS CHURCH...BAYARD...PETERSBURG...KEYSER...MARTINSBURG...
CHARLES TOWN
1244 PM EDT MON JUN 19 2006

...A SLIGHT RISK OF THUNDERSTORMS OVER PORTIONS OF THE MID
ATLANTIC TODAY...

A BROKEN LINE OF SHOWERS AND THUNDERSTORMS WILL MOVE EAST INTO THE
MID ATLANTIC THIS AFTERNOON AND AND EARLY EVENING. A FEW OF THE
STORMS COULD BECOME SEVERE AS AN UPPER LEVEL DISTURBANCE COMBINES
WITH A MODERATELY UNSTABLE AIRMASS.

THUNDERSTORMS WILL DEVELOP WEST OF THE BLUE RIDGE EARLY THIS
AFTERNOON. THESE STORMS WILL CROSS INTO THE BALTIMORE WASHINGTON
CORRIDOR DURING THE MID AFTERNOON HOURS...AND EXIT EAST OF THE BAY
BY EARLY EVENING. DAMAGING WIND GUSTS WILL BE POSSIBLE WITH ANY SEVERE
THUNDERSTORM THAT DEVELOPS. THE AREA UNDER GREATEST CONCERN WILL
BE NORTH OF HARRISONBURG...WASHINGTON DC...AND ANNAPOLIS.

RESIDENTS SHOULD MONITOR WEATHER CONDITIONS AND SEEK SHELTER
INDOORS IF THREATENING WEATHER APPROACHES.

LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR THE LATER
UPDATES ON THIS SITUATION.

HTS
Local storm report, Jun 19, 5:29 PM EDT, 1 hour 13 minutes before
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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 3:09 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 3:16 PM EDTSpecial Marine WarningLWX119 min
Jun 19, 4:35 PM EDTSpecial Marine WarningLWX115 min
Jun 19, 5:36 PM EDTSpecial Marine WarningLWX114 min
Jun 19, 5:48 PM EDTSevere Thunderstorm WarningLWXFairfax, City of Fairfax57 min
Jun 19, 6:06 PM EDTSevere Thunderstorm WarningLWXArlington, City of Alexandria, City of Falls Church41 min
Jun 19, 6:37 PM EDTSpecial Marine WarningLWX113 min
Jun 19, 5:18 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's57 min
Jun 19, 6:19 PM EDTSevere Thunderstorm WarningLWXPrince George's56 min

Nearby

Flash Flood Warnings in Virginia, 2006Every flash flood warning in 2006

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.