Alert archive / Ohio / Flash Flood Warnings in 1990

Flash Flood Warning 65, NWS Wilmington, OH

December 30, 1990Greene County, Montgomery County, Ohio

NWS Wilmington, OH issued this flash flood warning at Dec 30, 1990, 9:45 AM EST for Greene County, Montgomery County, Ohio. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 30, 1990, 9:45 AM EST (14:45 UTC)
Expired
Dec 30, 1990, 12:45 PM EST
In force
3 hr
Issued by
NWS Wilmington, OH
Area
Whole counties

Counties Greene County, OH, Montgomery County, OH

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 12:00Z, 2.8 hours before the alert went out and 22 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, Dayton/James M C, OH at 12:00Z on 1990-12-30Temperature 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, Dayton/James M C, OH at 12:00Z on 1990-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.19395878Sfc1 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
535 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
337 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 KDAY 301447
FFWDAY
OHC021-057-113-301745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE DAYTON OH
945 AM EST SUN DEC 30 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A URBAN AND SMALL
STREAM FLOOD WARNING EFFECTIVE UNTIL 1245 PM EST FOR PEOPLE IN
THE FOLLOWING COUNTIES

   IN THE STATE OF OHIO
      CHAMPAIGN...GREENE...MONTGOMERY

AT 940 SHERIFFS OFFICES REPORT SOME ROADS CLOSING ACROSS THE
COUNTIES AND THE MAD RIVER AT BANKFUL. WE CAN EXPECT MORE
ROAD CLOSING ACROSS THE REGION AS MODERATE RAIN CONTINES
ACROSS THE REGION DURING THE DAY.
WE HAVE HAD OVER TWO INCHS OF RAIN (2.31) AT THE AIRPORT AS
OF 9 AM AND STILL MORE TO COME.

DO QNOT DRIVE YOUR VEHICLE INTO AREAS WHERE 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 IMMEDIATELY.
MOVE TO HIGHER GROUND.

JDD

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.

In the hours before

Special weather statement, Dec 30, 6:37 AM EST, 3 hours 8 minutes before
OHZ008-INZ013-KYZ005-301300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CINCINNATI OHIO
637 AM EST SUN DEC 30 1990

...FLOOD WATCH EARLY TODAY FOR SOUTHWEST OHIO AND NORTHERN KENTUCKY...
...WINTER STORM WARNING FOR SOUTHEAST INDIANA TODAY...
...WINTER WEATHER ADVISORIES FOR NORTHERN KENTUCKY AND SOUTHWEST OHIO
   FOR LATE MORNING THROUGH EARLY EVENING...

A VARIETY OF WEATHER IS IN STORE FOR THE TRI STATE TODAY. EARLY THIS
MORNING RAIN WAS BEGINNING TO CHANGE TO FREEZING RAIN OVER WESTERN AND
CENTRAL INDIANA AS ARCTIC AIR BEHIND A COLD FRONT...NOW LOCATED EAST
OF THE TRI STATE...CONTINUED TO MOVE SLOWLY EAST OF THE AREA.

AT 6 O'CLOCK THIS MORNING WEATHER SERVICE RADAR SHOWED A LARGE AREA OF
RAIN THAT COVERED INDIANA...OHIO AND KENTUCKY. MOST OF THE SMALL STREAM
AND URBAN FLOODING HAS OCCURRED OVER WEST CENTRAL AND THE NORTHERN ONE
HALF OF OHIO. SINCE MIDNIGHT BUTLER COUNTY OF SOUTHWEST OHIO HAS RECEIVED
NEARLY EIGHT-TENTHS OF AN INCH OF RAINFALL. OVER THE NEXT SEVERAL HOURS
SMALL STREAMS MAY BEGIN TO SWELL AS WELL AS PONDING WATER OVER HIGHWAYS.
IF YOU LIVE IN THIS AREA PLEASE REPORT HIGH WATER PROBLEMS TO THE LOCAL
SHERIFF DEPARTMENT.

FREEZING RAIN WILL DEVELOP FROM THE WEST LATE THIS MORNING AND SPREAD
EASTWARD AS THE DAY PROGRESSES. SLEET AND THEN SNOW WILL SOON FOLLOW BY
LATE AFTERNOON AND EARLY EVENING.

DRIVING WILL BECOME VERY DANGEROUS LATER TODAY. BY LATE TONIGHT...
ARCTIC AIR WILL CREATE WIND CHILLS NEAR OR SLIGHTLY BELOW ZERO AS
TEMPERATURES FALL INTO THE MIDDLE TEENS.

STAY TUNED TO NOAA WEATHER RADIO AS CHANGING WEATHER MAY REQUIRE FURTHER
WARNINGS OR ADVISORIES CONCERNING RAIN...SLEET...FREEZING RAIN OR SNOW.

MEDLIN
Special weather statement, Dec 30, 7:21 AM EST, 2 hours 24 minutes before
OHZ005-010-301420-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTON OH
720 AM EST SUN DEC 30 1990

...FLOOD WATCH THIS MORNING...
...WINTER WEATHER ADVISORY TODAY...

RAIN COVERS MOST OF OHIO AND INDIANA THIS MORNING AND HAS CAUSED CREEKS
AND SMALL STREAMS TO OVERFLOW THEIR BANKS...FLOODING MANY ROADS OVER
THE AREA.

A COLD FRONT WHICH MOVED THROUGH WESTERN OHIO EARLY THIS MORNING IS
PUSHING TO THE EAST AS VERY COLD AIR SPILLS DOWN OUT OF CANADA INTO
THE MIDWEST. FREEZING RAIN AND SLEET HAVE STARTED IS WESTERN INDIANA
WHILE SNOW IS BEING REPORTED IN ILLINOIS.

THE COLDER AIR WILL MOVE INTO WESTERN OHIO LATER THIS MORNING CHANGING
THE RAIN TO FREEZING RAIN THEN TO SNOW. THIS WILL PRODUCE HAZARDOUS
DRIVING CONDITIONS ACROSS THE AREA THROUGH THE DAY AS UP TO 2 INCHES OF
SNOW IS EXPECTED OVER WEST CENTRAL OHIO AND THE MIAMI VALLEY.

SNOW WILL END LATE TONIGHT AS VERY COLD ARCTIC AIR SETTLES IN OVER THE
MIDWEST FOR THE NEXT @SEVERAL DAYS.

MS

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 29, 9:14 PM ESTFlash Flood WarningILNMercer, Van Wert3 hr
Dec 29, 9:36 PM ESTFlash Flood WarningILNDarke3 hr
Dec 30, 12:01 AM ESTFlash Flood WarningILNAuglaize3 hr
Dec 30, 12:29 AM ESTFlash Flood WarningILNDarke, Mercer, Van Wert3 hr
Dec 30, 12:53 AM ESTFlash Flood WarningILNCrawford, Morrow, Richland4 hr
Dec 30, 12:53 AM ESTFlash Flood WarningILNAshland4 hr
Dec 30, 3:16 AM ESTFlash Flood WarningILNAuglaize, Darke, Mercer, Van Wert3 hr
Dec 30, 3:16 AM ESTFlash Flood WarningILNAllen, Hardin, Logan3 hr
Dec 30, 5:07 AM ESTFlash Flood WarningILNAshland, Richland3 hr
Dec 30, 5:07 AM ESTFlash Flood WarningILNCrawford, Morrow3 hr
Dec 30, 9:25 AM ESTFlash Flood WarningILNMorrow3 hr
Dec 30, 9:45 AM ESTFlash Flood WarningILNChampaign3 hr
Dec 30, 10:17 AM ESTFlash Flood WarningILNButler3 hr
Dec 30, 1:08 PM ESTFlash Flood WarningILNButler4 hr
Dec 30, 2:53 PM ESTFlash Flood WarningILNClinton, Warren4 hr
Dec 30, 3:16 PM ESTFlash Flood WarningILNHighland4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNChampaign, Clark, Logan, Miami, Shelby4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNAllen, Auglaize, Hardin4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNDarke, Mercer, Van Wert4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNMontgomery, Preble4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNGreene4 hr
Dec 30, 4:28 PM ESTFlash Flood WarningILNBrown3 hr

Nearby

Flash Flood Warnings in Ohio, 1990Every flash flood warning in 1990

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.