Alert archive / Ohio / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 24, NWS Cleveland, OH

May 1, 2004Marion County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at May 1, 2004, 5:11 PM EDT for Marion County, Ohio. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 1, 2004, 5:11 PM EDT (21:11 UTC)
Expired: May 1, 2004, 6:15 PM EDT
In force: 64 min
Issued by: NWS Cleveland, OH
Area: Counties, with a storm outline in the text

County Marion County, OH

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.2 hours before the alert went out and 142 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: 103 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCLE 012111
SVRCLE
OHC101-012215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
509 PM EDT SAT MAY 1 2004

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARION COUNTY IN NORTH CENTRAL OHIO...

* UNTIL 615 PM EDT

* AT 509 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES WEST OF PROSPECT...OR ABOUT 13 MILES
  SOUTHWEST OF MARION...MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  MARION
  PROSPECT
  WALDO

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH THIS
STORM. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS PASSED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN CLEVELAND.

LAT...LON 4070 8302 4070 8287 4065 8287 4065 8296
          4050 8296 4048 8302 4044 8302 4045 8324
          4050 8324 4050 8336

$$

MRD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cleveland, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at May 1, 3:15 PM EDT, 1 hour 56 minutes earlier.

Area forecast discussion, May 1, 3:15 PM EDT, 1 hour 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CLEVELAND OH
315 PM EDT SAT MAY 1 2004

.DISCUSSION...

CONVECTION IS INTENSIFING FROM YNG TO NEAR CMH THIS AFTERNOON WITH
CAPES AROUND 1000 J/KG WHICH IS MUCH HIGHER THAN MODEL GUIDANCE OF
EITHER THE RUC/ETA OR GFS RUNS. SPC SUPERCELL PARAMETER HAS INCR TO
ABOUT 1 NEAR KNOX COUNTY WHICH MEANS CONDITIONS ARE BECOMING
FAVORABLE FOR SUPERCELL DEVELOPMENT. SFC WINDS ARE BACKING IN
ADVANCE OF THE SFC LOW PRESSURE WAVE THAT IS MOVING NE TOWARD THE
REGION. THIS WILL INCREASE LOW LEVEL HELICITY AND AID IN STORM
ROTATION AND INCREASE THE LIKELYHOOD OF DAMAGING WINDS AND LARGE
HAIL. BUFKIT SOUNDINGS OVER THE THREAT AREA SHOWS THE SFC DELTA
THEATA-E TO BE AROUND 15C LATE THIS AFTERNOON WHICH SHOULD AID IN
DOWNBURST POTENTIAL OF STORMS. THE MAIN THREAT AREA CONTINUES TO BE
FROM SOUTHEAST CRAWFORD PA SOUTHWEST THROUGH YNG AND TO KNOX COUNTY.
THE THREAT WILL PERSIST UNTIL THE SFC WAVE MOVE NE OF THE REGION
PERHAPS AROUND 02 UTC. THERE IS SOME CONCERN ABOUT FLOODING AS
RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE HEAVIER
DOWNPOURS.

THE SURFACE LOW WILL TRACK NE OF THE REGION SUNDAY AS COOLER AND
MORE STABLE AIR OVERSPREADS THE REGION. BOTH THE ETA AND GFS ARE
SLOWER THAN YESTERDAYS RUN IN MOVING THE SHORT WAVE EAST OF THE
REGION. CONSEQUENTLY...THE PCPN WILL LINGER TO PERHAPS MIDDAY NOW
ACROSS MOST OF THE AREA. GRADUAL CLEARING WILL PROGRESS EWD SUNDAY
AFTERNOON.  COOL HIGH PRESSURE WILL BUILD INTO THE REGION MONDAY SO
THERE IS SOME CONCERN ABOUT FROST.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
PA...NONE.

&&

REL

Hazardous weather outlook, May 1, 2:38 PM EDT, 2 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CLEVELAND OH
238 PM EDT SAT MAY 1 2004

OHZ020>023-029>033-037-038-047-PAZ003-012037-
ASHLAND OH-CRAWFORD PA-HOLMES OH-KNOX OH-MAHONING OH-MEDINA OH-
MORROW OH-PORTAGE OH-RICHLAND OH-STARK OH-SUMMIT OH-TRUMBULL OH-
WAYNE OH-
INCLUDING THE CITIES OF...AKRON...ASHLAND...CANTON...MANSFIELD...
MEADVILLE...MEDINA...MILLERSBURG...MOUNT GILEAD...MOUNT VERNON...
RAVENNA...WARREN...WOOSTER AND YOUNGSTOWN
239 PM EDT SAT MAY 1 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTION OF NORTHERN OHIO AND A
PORTION OF NORTHWEST PENNSYLVANIA.

.DAY ONE...TODAY

THUNDERSTORMS WILL CONTINUE ACROSS THE AREA AND THERE IS A SLIGHT
RISK THAT SOME OF THEM WILL BECOME SEVERE.  THE THUNDERSTORMS WILL
CONTINUE TO INTENSIFY DURING THE AFTERNOON HOURS.

THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY.  SPOTTERS ARE ASKED TO MONITOR
THE STORMS AND REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER
SERVICE.

LOMBARDY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 7:18 PM EDT	Severe Thunderstorm Warning	CLE	Wayne	42 min
May 1, 7:26 PM EDT	Severe Thunderstorm Warning	CLE	Medina	64 min
May 1, 7:53 PM EDT	Special Marine Warning	CLE		2 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2004 Every severe thunderstorm warning in 2004

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.