Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 150, NWS Jacksonville, FL

June 18, 1998Alachua County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 18, 1998, 8:15 PM EDT for Alachua County, Florida. It was in force for 35 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
Jun 18, 1998, 8:15 PM EDT (00:15 UTC)
Expired
Jun 18, 1998, 8:50 PM EDT
In force
35 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Alachua County, FL

The radar

The Jacksonville radar (KJAX), 110 km from the middle of the area, began a volume at 00:18 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.3 hours before the alert went out and 204 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, Tallahassee Rgnl, FL at 00:00Z on 1998-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2537 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tallahassee Rgnl, FL at 00:00Z on 1998-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 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
2537 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1507 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.8

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 3:46 PM EDTSevere Thunderstorm WarningJAXMarion64 min
Jun 19, 4:40 PM EDTSevere Thunderstorm WarningJAXFlagler60 min
Jun 19, 5:16 PM EDTSevere Thunderstorm WarningJAXSaint Johns64 min
Jun 19, 5:40 PM EDTSevere Thunderstorm WarningJAXHamilton, Suwannee65 min
Jun 19, 6:09 PM EDTSevere Thunderstorm WarningJAXClay61 min
Jun 19, 6:17 PM EDTSevere Thunderstorm WarningJAXNassau63 min
Jun 19, 6:21 PM EDTSevere Thunderstorm WarningJAXSaint Johns64 min
Jun 19, 6:27 PM EDTSevere Thunderstorm WarningJAXDuval63 min
Jun 19, 7:12 PM EDTSevere Thunderstorm WarningJAXClay33 min
Jun 19, 7:20 PM EDTSevere Thunderstorm WarningJAXNassau60 min
Jun 19, 7:25 PM EDTSevere Thunderstorm WarningJAXBaker65 min
Jun 19, 7:29 PM EDTSevere Thunderstorm WarningJAXDuval61 min
Jun 19, 2:41 PM EDTSevere Thunderstorm WarningJAXGlynn64 min
Jun 19, 4:55 PM EDTSevere Thunderstorm WarningJAXBrantley, Charlton65 min
Jun 19, 5:06 PM EDTSevere Thunderstorm WarningJAXWayne49 min
Jun 19, 5:31 PM EDTSevere Thunderstorm WarningJAXGlynn64 min
Jun 19, 5:48 PM EDTSevere Thunderstorm WarningJAXCamden92 min
Jun 19, 6:15 PM EDTSevere Thunderstorm WarningJAXBacon, Brantley, Pierce, Wayne60 min
Jun 19, 6:33 PM EDTSevere Thunderstorm WarningJAXClinch, Echols62 min
Jun 19, 6:40 PM EDTSevere Thunderstorm WarningJAXWare65 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning in 1998

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.