Alert archive / Ohio / Flash Flood Warnings in 2010

Flash Flood Warning 29, NWS Wilmington, OH

July 12, 20109 counties in Ohio

NWS Wilmington, OH issued this flash flood warning at Jul 12, 2010, 5:07 AM EDT for 9 counties in Ohio. 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: Jul 12, 2010, 5:07 AM EDT (09:07 UTC)
Expired: Jul 12, 2010, 8:00 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Butler County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Greene County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 55 km from the middle of the area, began a volume at 09:08 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.

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 Wilmington, OH wrote its last area forecast discussion before this flash flood warning went out at Jul 12, 4:54 AM EDT, 13 minutes earlier.

Area forecast discussion, Jul 12, 4:54 AM EDT, 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
454 AM EDT MON JUL 12 2010

.SYNOPSIS...
A WAVE OF LOW PRESSURE WILL TRACK THROUGH THE GREAT LAKES TODAY
BRINGING THE THREAT OF SHOWERS AND THUNDERSTORMS. AN ASSOCIATED
FRONTAL BOUNDARY WILL STALL OUT TO OUR NORTHWEST TONIGHT THROUGH
TUESDAY...KEEPING A CHANCE OF THUNDERSTORMS ACROSS THE REGION.
TEMPERATURES WILL WARM UP AND RAIN CHANCES WILL END ON
WEDNESDAY...AS AN UPPER LEVEL RIDGE BUILDS ACROSS THE OHIO VALLEY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

ACTIVE WEATHER PATTERN WITH AN INITIAL SHORTWAVE COMING THROUGH
OHIO THIS MORNING. WEAK LOW LEVEL JET ALONG WITH ELEVATED INSTBY
APPROACHING 1000 J/KG HAS LED TO WIDESPREAD SHOWERS/THUNDERSTORMS
ACROSS EASTERN INDIANA AND WEST CENTRAL OHIO. EXPECT THIS COMPLEX
TO TRACK ACROSS OHIO THIS MORNING WITH THE BEST COVERAGE ACROSS
ILN/S NRN FA. HAVE OPTED FOR CATEGORICAL POPS ACROSS THE NORTH
WITH LKLY POPS SOUTH THIS MORNING. AMOUNT OF REDEVELOPMENT THIS AFTN
IS UNCERTAIN. IN THE WAKE OF THE MORNING ACTIVITY THE NUMERICAL
MODELS ARE DEVELOPING MODERATE INSTBY. HOWEVER...THE BETTER
FORCING WL BE OFF TO THE EAST AND DOES NOT LINE UP WITH THIS
INSTBY. THEREFORE...HAVE LIMITED AFTN POPS TO CHC CATEGORY. HAVE
STAYED CLOSE TO MAV GUID FOR HIGHS TODAY.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY/...
IN WESTERLY FLOW ALOFT A MEAN TROF AXIS TRANSLATES FROM THE MS VLY
TONIGHT INTO THE OHIO VALLEY ON TUESDAY. ANY INSTBY DRIVEN CONVECTION
SHUD DIMINISH IN COVERAGE THIS EVENING WITH BOUNDARY DROPPING INTO
ILN/S FA OVERNIGHT. HAVE CHC POPS CWA WIDE EARLY AND THEN DIMINISH POPS
TO SLIGHT CHC ACRS THE N...WHILE MAINTAINING CHC POPS SOUTH WHERE
INSTBY CONTS OVERNIGHT. PREFER TEMPS A LTL ABOVE MAV GUID FOR LOWS
TONIGHT.

IN RESPONSE TO UPPER LEVEL TROF...ALL NUMERICAL MODEL SOLNS
DEVELOP A SFC WAVE WHICH TRACKS THRU THE OHIO VALLEY ON TUESDAY.
THIS FORCING COMBINED WITH MODERATE INSTBY WL INCREASE THUNDERSTORM
CHANCES. HAVE RAMPED UP TO LKLY POPS ACRS THE SOUTH AND CHC NORTH
TUESDAY AFTN. HAVE OPTED A BLEND OF MAV/MET FOR HIGHS TUES...LEANING
MORE TOWARD MAV NUMBERS.

IN THE WAKE OF THIS MID/UPPER LEVEL TROF...RIDGING BUILDS INTO THE
GREAT LAKES/OHIO VALLEY ON WEDNESDAY. NAM SOLN IS OUTLIER HOLDING
ONTO PRECIP LONGER WHILE THE GFS/ECMWF BUILD THE RIDGE IN QUICKER.
HAVE LIMITED MENTION OF THUNDERSTORMS TO THE SE MAINLY EARLY ON
WEDNESDAY. BASED ON 8H TEMPS HAVE WARMED UP HIGHS BUT NOT QUITE AS
WARM AS MAV GUID NUMBERS.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
REGION WILL BE ON THE SOUTHERN EDGE OF THE WESTERLIES THROUGH THE
PERIOD. WEAK DISTURBANCES MOVING THROUGH THE FLOW WILL BRING
OCCASIONAL CHANCES OF SHOWERS AND THUNDERSTORMS ALTHOUGH TIMING OF
THESE IS DIFFICULT AT BEST. A BOUNDARY WILL PUSH SOUTHEAST TOWARDS
THE REGION LATER THURSDAY BEFORE WASHING OUT ON FRIDAY. WARM
ADVECTION WILL RETURN OVER THE WEEKEND WITH THE POTENTIAL OF
ANOTHER BOUNDARY SAGGING SOUTH LATE IN THE PERIOD. ABOVE NORMAL
TEMPERATURES WILL CONTINUE THROUGHOUT.

&&

.AVIATION /08Z MONDAY THROUGH FRIDAY/...
SCATTERED CONVECTION WILL AFFECT TAF SITES. IT APPEARS MOST
THUNDERSTORMS WILL BE NORTH OF TAF SITES FOR THE FIRST FEW
HOURS...WITH ASSOCIATED MVFR CONDITIONS EXPANDING TO THE SOUTH
AROUND 10Z. A LULL DURING MID MORNING MAY BE FOLLOWED BY MORE
CONVECTION DURING THE AFTERNOON. ACTIVITY IS EXPECTED TO DIMINISH
ABOUT 01Z WITH LOSS OF DAYTIME HEATING.

OUTLOOK...THUNDERSTORMS POSSIBLE THROUGH WEDNESDAY.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
KY...NONE.
IN...NONE.

&&

SYNOPSIS...AR
NEAR TERM...AR
SHORT TERM...AR
LONG TERM...
AVIATION...CONIGLIO

Hazardous weather outlook, Jul 11, 5:55 AM EDT, 23 hours 12 minutes before

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The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 4:12 AM EDT	Areal Flood Advisory	ILN	Champaign, Clark, Darke, Greene, Logan, Miami and 3 more	4 hr
Jul 12, 6:10 AM EDT	Areal Flood Advisory	ILN	Champaign, Clark, Fayette, Franklin, Greene, Madison and 1 more	2 hr
Jul 12, 5:18 PM EDT	Special Weather Statement	ILN	Fairfield	42 min
Jul 12, 5:30 PM EDT	Areal Flood Advisory	ILN	Fairfield	75 min
Jul 12, 6:05 PM EDT	Special Weather Statement	ILN	Hocking	55 min

Nearby

Flash Flood Warnings in Ohio, 2010 Every flash flood warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.