Alert archive / Ohio / Flash Flood Warnings in 2002

Flash Flood Warning 10, NWS Wilmington, OH

April 21, 2002Adams County, Ohio

NWS Wilmington, OH issued this flash flood warning at Apr 21, 2002, 6:42 PM EDT for Adams County, Ohio. It was in force for 93 min. 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 21, 2002, 6:42 PM EDT (22:42 UTC)
Expired: Apr 21, 2002, 8:15 PM EDT
In force: 93 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Adams County, OH

The radar

The Cincinnati radar (KILN), 71 km from the middle of the area, began a volume at 22:43 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, 10.7 hours before the alert went out and 71 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: 498 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 390 m²/s²
0-3 km storm-relative helicity: 453 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 
WGUS51 KILN 212242
FFWILN
OHC001-220015-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
639 PM EDT SUN APR 21 2002

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ADAMS COUNTY IN SOUTH CENTRAL OHIO...

* UNTIL 815 PM EDT...

* WEATHER SERVICE RADAR INDICATED VERY HEAVY RAIN OVER NORTHERN 
  ADAMS COUNTY. UP TO 2 INCHES OF RAIN HAS FALLEN SINCE 6 PM...WITH 
  AN ADDITIONAL INCH OR MORE EXPECTED THROUGH 8 PM.

* AT 639 PM EDT...THE HEAVIEST RAIN WAS LOCATED 4 MILES NORTHWEST OF 
  PEEBLES...OR ABOUT 17 MILES SOUTHEAST OF HILLSBORO...AND THE 
  THUNDERSTORM WAS MOVING EAST AT 50 MPH.

* SOME LOCATIONS IN THE WARNING AREA INCLUDE...
  LOCUST GROVE...
  LOUDEN...
  MARBLE FURNACE...
  MAY HILL...
  PEEBLES...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

STAY TUNED TO WEATHER RADIO OR LOCAL MEDIA FOR ANY FURTHER STATEMENTS
OR WARNINGS.

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 21, 3:50 PM EDT, 2 hours 52 minutes earlier.

Area forecast discussion, Apr 21, 3:50 PM EDT, 2 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
350 PM EDT SUN APR 21 2002

THANKS TO IND AND RLX FOR THE COORDINATION.  WILL CONTINUE WITH THE
FLOOD WATCH ACROSS SE INDIANA AND SW OHIO.  LINE OF CONVECTION HAS
ORIENTED ITSELF E-W ACROSS BROWN TO SCIOTO COUNTIES. SO WILL EXPEND
THE WATCH AREA TO THE EAST.

AS FOR THE REST OF THE FORECAST...WARM FRONT APPEARS TO BE RUNNING
ACROSS MY KY COUNTIES.  TEMPERATURES ARE IN THE 70S IN SDF AND
LEX...BUT IN THE 40S IN CVG.  SURFACE LOW IN WRN IL WILL MOVE UP THE
OHIO RIVER TONIGHT...CROSSING THE FA BETWEEN 03Z AND 06Z.
ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED AS THE LOW PASSES
BY.  PCPN SHOULD END WITH PASSAGE OF LOW.

ETA IS STRONGEST WITH A VORT DROPPING INTO NORTHERN OHIO ON MONDAY.
THIS COULD KICK OFF SCATTERED SHOWERS...SO WILL KEEP THE RAIN
SHOWERS IN THE NORTH.  1000-850 THICKNESS ARE ABOVE 1300 SO WONT
MENTION SNOW.

HIGH BUILDS IN FOR MONDAY NIGHT AND TUESDAY.

EXPECT TEMPERATURES TO RISE A LITTLE THIS EVENING ACROSS THE SOUTH
AS LOW PUSHES THE FRONT TO THE NORTH.  OTHER THAN THAT MOS NO TOO
FAR FROM CURRENT FORECAST...SO LITTLE CHANGE EXPECTED.  CLEMISILN
OUT ASAP.

.ILN...
IN...FLOOD WATCH TONIGHT INZ058>059-INZ066-INZ073>074.
KY...FLOOD WATCH TONIGHT KYZ091>093.
OH...FLOOD WATCH TONIGHT OHZ070>073...OHZ077>082...OHZ088.

SITES

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 5:42 PM EDT	Severe Thunderstorm Warning	ILN	Clinton	48 min
Apr 21, 5:58 PM EDT	Severe Thunderstorm Warning	ILN	Highland	47 min
Apr 21, 6:28 PM EDT	Severe Thunderstorm Warning	ILN	Ross	47 min
Apr 21, 6:56 PM EDT	Severe Thunderstorm Warning	ILN	Hocking	34 min

Nearby

Flash Flood Warnings in Ohio, 2002 Every flash flood warning in 2002

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.