Alert archive / Ohio / Flash Flood Warnings in 1996

Flash Flood Warning 113, NWS Wilmington, OH

December 1, 1996Clermont County, Ohio

NWS Wilmington, OH issued this flash flood warning at Dec 1, 1996, 1:43 AM EST for Clermont County, Ohio. 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: Dec 1, 1996, 1:43 AM EST (06:43 UTC)
Expired: Dec 1, 1996, 5:15 AM EST
In force: 4 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

County Clermont County, OH

The radar

The Cincinnati radar (KILN), 50 km from the middle of the area, began a volume at 06:44 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.7 hours before the alert went out and 52 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 555 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KILN 010645
FFWILN
OHC025-011015-
 
BULLETIN -
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
143 AM EST SUN DEC 1 1996
 
THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A
FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS UNTIL  515 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST OHIO
 
   ...CLERMONT COUNTY
 
HEAVY RAINFALL CONTINUES TO FALL ACROSS SOUTHWESTERN OHIO. RAINFALL
AMOUNTS OF 1 TO 1.5 INCHES HAVE FALLEN SINCE MIDNIGHT. THIS IS LEADING
TO FLOODING OF ROADWAYS...BASEMENTS AND SMALLER CREEKS. RAIN WILL
CONTINUE THROUGH THE EARLY MORNING HOURS...SO FLOODING CAN BE EXPECTED
TO CONTINUE.
 
NEVER DRIVE YOUR CAR INTO A FLOODED ROADWAY. YOU CAN EASILY
BECOME STRANDED OR TRAPPE D. THE DEPTH OF WATER IS NOT ALWAYS
OBVIOUS. IF YOU ARE UNSURE ABOUT THE ROAD CONDITION OR THE WATER
LEVEL AHEAD OF YOU...TURN AROUND AND TAKE ANOTHER ROUTE.
 
FARINA

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 Nov 30, 8:42 PM EST, 5 hours 1 minute earlier.

Area forecast discussion, Nov 30, 8:42 PM EST, 5 hours 1 minute before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
840 PM EST SAT NOV 30 1996

LTST SFC ANLYS SHWG LOW PRES OVR LAK SUP WITH CDFNT XTNDG DOWN THRU
WI INTO SRN IL. WAA CONTG ACRS FA WITH MAINLY CLDS AND SOME DZ/-RA
SO FAR THIS EVNG. XTRM SE FA NEAR PRT HAS SEEN A LTL MORE PCPN BUT
AMTS HAV STILL BEEN ON LGT SIDE. SAT PIX/AREA RADARS INDCTG TWO AREAS
OF PCPN. FIRST AREA OF PCPN ASCTD WITH S/W MOVG THRU TN VLY ATTM SHUD
GNRLY RMN S AND E OF FA THO WL LIKELY BRUSH ACRS XTRM SE FA THRU MDNGT.
OTHER AREA OF PCPN ACRS SW IND/WRN KY/SRN IL WL CONT TO PUSH NE OVRNGT
AS STG S/W OVR MS VLY LIFTS NE. THIS PCPN WL OVRSPRD FA FM THE SW TWD
MDNGT AND CONT OVRNGT. WITH PW/S XCDG 1.0 OVRNGT ACRS S WL HAV TO CONT
TO WATCH FOR FLOODING AS ONE HR FFG ARND 1/2 INCH MOST PLACES. AREA OF
MOST CONCERN ACRS SE FA WHERE BEST UPR LVL DIVG/LLVL CONV PROGD OVRNGT
AND MAY NEED TO GO WITH FFA FOR PRT AREA. LDS NOT SHWG MUCH TO THE SW
ATTM BUT WITH 0STG UVV OVRNGT AND THETA-E AXIS XTNDG INTO SRN FA OVRNGT
ALG WITH LI/S APRCHG ZERO...MAY STILL SEE A FEW TSTMS OVRNGT...MAINLY
ACRS SRN PRTNS OF FA. TMPS SHUD CONT TO HOLD NEARLY STEADY OVRNGT...
RANGING FM UPR 40S N TO LWR 50S S.

LOTT

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 1:07 AM EST	Flash Flood Warning	ILN	Hamilton	4 hr
Dec 1, 1:23 AM EST	Flash Flood Warning	ILN	Butler	4 hr

Nearby

Flash Flood Warnings in Ohio, 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.