Alert archive / Florida / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 56

February 22, 199811 counties in Florida; 7 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Feb 22, 1998, 11:30 AM EST for 11 counties in Florida; 7 counties in Georgia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Feb 22, 1998, 11:30 AM EST (16:30 UTC)
Expired
Feb 22, 1998, 4:00 PM EST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Glynn County, GA, Pierce County, GA, Ware County, GA

Warnings issued inside it

12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Feb 22, 11:32 AM ESTSevere Thunderstorm WarningJAXBaker, Bradford, Columbia, Union118 min
Feb 22, 11:32 AM ESTSevere Thunderstorm WarningJAXAlachua118 min
Feb 22, 11:54 AM ESTSevere Thunderstorm WarningJAXCharlton, Ware91 min
Feb 22, 12:29 PM ESTSevere Thunderstorm WarningJAXClay, Duval, Nassau92 min
Feb 22, 1:04 PM ESTSevere Thunderstorm WarningJAXCamden61 min
Feb 22, 1:10 PM ESTFlash Flood WarningJAXCamden, Charlton6 hr
Feb 22, 1:17 PM ESTSevere Thunderstorm WarningJAXGlynn58 min
Feb 22, 2:15 PM ESTSevere Thunderstorm WarningJAXAlachua45 min
Feb 22, 3:16 PM ESTSevere Thunderstorm WarningJAXPutnam45 min
Feb 22, 3:34 PM ESTTornado WarningJAXPutnam31 min
Feb 22, 3:46 PM ESTSevere Thunderstorm WarningJAXAlachua, Marion44 min
Feb 22, 3:52 PM ESTSevere Thunderstorm WarningJAXSaint Johns38 min

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 4.5 hours before the alert went out and 51 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, Jacksonville, FL at 12:00Z on 1998-02-22Temperature 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, Jacksonville, FL at 12:00Z on 1998-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 270 square meters per square second.1939587897117Sfc1 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
1448 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
270 m²/s²
0-3 km storm-relative helicity
371 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 22, 8:30 AM ESTTornado WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 14 more6 hr
Feb 22, 2:15 PM ESTTornado WatchSPCBrevard, Citrus, DeSoto, Flagler, Hardee, Hernando and 18 more7 hr

Nearby

Severe Thunderstorm Watches in Florida, 1998Severe Thunderstorm Watches in Georgia, 1998Every severe thunderstorm watch 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.