Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 28, NWS Melbourne, FL

May 6, 1999Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 6, 1999, 8:05 PM EDT for Volusia County, Florida. It was in force for 65 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: May 6, 1999, 8:05 PM EDT (00:05 UTC)
Expired: May 6, 1999, 9:10 PM EDT
In force: 65 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 00:05 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

Jacksonville, FL (KJAX), launched 00:00Z, 0.1 hours before the alert went out and 168 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: 1094 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1748 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Melbourne, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 6, 2:45 PM EDT, 5 hours 20 minutes earlier.

Area forecast discussion, May 6, 2:45 PM EDT, 5 hours 20 minutes before

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The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 8:58 PM EDT	Severe Thunderstorm Warning	MLB	Orange	47 min
May 6, 9:06 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	24 min
May 6, 9:49 PM EDT	Severe Thunderstorm Warning	MLB	Orange	31 min
May 6, 9:54 PM EDT	Severe Thunderstorm Warning	MLB	Seminole	46 min
May 6, 9:58 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	47 min
May 7, 2:40 PM EDT	Severe Thunderstorm Warning	MLB	Lake	50 min
May 7, 3:15 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	50 min
May 7, 3:33 PM EDT	Severe Thunderstorm Warning	MLB	Lake	62 min
May 7, 4:05 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	60 min
May 7, 4:14 PM EDT	Severe Thunderstorm Warning	MLB	Orange	31 min
May 7, 4:37 PM EDT	Severe Thunderstorm Warning	MLB	Lake	48 min
May 7, 4:43 PM EDT	Severe Thunderstorm Warning	MLB	Orange	32 min
May 7, 5:11 PM EDT	Severe Thunderstorm Warning	MLB	Seminole	34 min

Nearby

Severe Thunderstorm Warnings in Florida, 1999 Every severe thunderstorm 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.