Alert archive / Ohio / Flash Flood Warnings in 1999

Flash Flood Warning 9, NWS Wilmington, OH

April 28, 1999Champaign County, Clark County, Ohio

NWS Wilmington, OH issued this flash flood warning at Apr 28, 1999, 8:27 AM EDT for Champaign County, Clark County, 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: Apr 28, 1999, 8:27 AM EDT (12:27 UTC)
Expired: Apr 28, 1999, 11:30 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

Counties Champaign County, OH, Clark County, OH

The radar

The Cincinnati radar (KILN), 68 km from the middle of the area, began a volume at 12:28 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 12:00Z, 0.5 hours before the alert went out and 66 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: 584 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 114 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 KCVG 281257 COR
FFWILN
OHC021-023-281530-

BULLETIN
FLOOD WARNING...CORRECTED EFFECTIVE TIME
NATIONAL WEATHER SERVICE WILMINGTON OH
827 AM EDT WED APR 28 1999

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS FOR...
  CHAMPAIGN COUNTY IN WEST CENTRAL OHIO.
  CLARK COUNTY IN WEST CENTRAL OHIO.

* EFFECTIVE UNTIL 1130 AM EDT.

*DOPPLER RADAR INDICATED AN AREA OF PERSISTENT RAIN FROM WESTERN
 CHAMPAIGN COUNTY NEAR ST PARIS THROUGH SPRINGFIELD.  RAINFALL
 ESTIMATES FROM THE RADAR INDICATE FROM ONE AN A HALF TO TWO AN A
 HALF INCHES OF RAIN HAS FALLEN SINCE EARLY THIS MORNING.  CURRENT
 INDICATIONS ARE THAT LIGHT TO MODERATE RAIN WILL CONTINUE FROM ST
 PARIS THROUGH SPRINGFIELD THROUGH 11 AM.

*COUNTY SHERRIFF IN CHAMPAIGN COUNTY REPORTED HIGH WATER ON
 ROUTE 55 SOUTH OF ST PARIS.

AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS AND BE PREPARED
TO MOVE TO HIGHER GROUND SHOULD FLOOD WATERS THREATHEN.

TIPTON

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 Apr 28, 3:33 AM EDT, 4 hours 54 minutes earlier.

Area forecast discussion, Apr 28, 3:33 AM EDT, 4 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
330 PM EDT WED APR 28 1999

STACKED/WEAKENING LOW WILL SLIDE SE TOWARD THE TN VLY TDY. THUS THE
PRECIP FOCUS SHOULD SHIFT BACK TO THE SOUTH.  THE RA WILL LINGER
THIS MORN IN WAPAK WHILE ALONG THE OHIO RVR RA AND TS WILL RETURN
LATER THIS MORN/AFT.  THE LOWS CONT TO FILL HELPING TO BRING AN END
TO THE PRECIP BY MIDNIGHT IN THE SOUTH.

MID LVL DRY PUNCH WORKING IN THIS MRNG WHILE LLVL DRY AIR WILL SINK
SOUTH AS THE LOW EXITS THE AREA TONIGHT. IN NRN ZNS GOING DECREASING
CLOUDS TONIGHT.  MSTR WILL LINGER IN THE SOUTH BUT WITH THE LIFT
GONE...NO PRECIP EXPECTED AFTER TONIGHT.  SRN AREAS SHOULD SEE THE
LLVL DRY AIR WORK IN ON THU.

ENE SFC WINDS ARE NOT AS STRONG AS PREVIOUSLY THOUGHT BUT THEY
SHOULD PICK UP SOME AFTER SR.  WILL GENERALLY GO 10 TO 20.  WENT
CLOSER TO COOLER FAN NUMS FOR TDYS TEMPS DUE TO CLDS/RA BUT STUCK
CLOSE TO FWC FOR THE REST OF THE PDS.

MISILN OUT SHORTLY.

.ILN...NONE.

WHITE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 5:32 AM EDT	Flash Flood Warning	ILN	Auglaize, Mercer, Shelby	4 hr
Apr 28, 8:53 AM EDT	Flash Flood Warning	ILN	Pickaway, Ross	3 hr

Nearby

Flash Flood Warnings in Ohio, 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; radar from the NEXRAD Level II archive.