Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 133, NWS Melbourne, FL

July 30, 2023Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 30, 2023, 5:53 PM EDT for Volusia County, Florida. It was in force for 22 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
Jul 30, 2023, 5:53 PM EDT (21:53 UTC)
Expired
Jul 30, 2023, 6:15 PM EDT
In force
22 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 21:56 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 12:00Z, 9.9 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-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2023-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1737 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, Jacksonville, FL at 12:00Z on 2023-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.1939Sfc1 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
1737 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
925 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 2:19 AM EDTHeat AdvisoryMLBBrevard, Indian River, Lake, Martin, Okeechobee, Orange and 4 more15 hr
Jul 30, 3:48 PM EDTSpecial Weather StatementMLBSaint Lucie27 min
Jul 30, 4:19 PM EDTSpecial Weather StatementMLBSeminole26 min
Jul 30, 4:20 PM EDTSpecial Weather StatementMLBVolusia25 min
Jul 30, 4:30 PM EDTSpecial Weather StatementMLBSeminole30 min
Jul 30, 4:43 PM EDTSpecial Weather StatementMLBVolusia32 min
Jul 30, 4:51 PM EDTSevere Thunderstorm WarningMLBLake, Volusia24 min
Jul 30, 4:57 PM EDTSpecial Weather StatementMLBSeminole33 min
Jul 30, 5:07 PM EDTSpecial Weather StatementMLBIndian River23 min
Jul 30, 5:48 PM EDTSpecial Weather StatementMLBVolusia27 min
Jul 30, 5:53 PM EDTSpecial Marine WarningMLB34 min
Jul 30, 6:46 PM EDTSpecial Weather StatementMLBOrange44 min
Jul 30, 7:06 PM EDTAreal Flood AdvisoryMLBLake114 min
Jul 30, 7:29 PM EDTAreal Flood AdvisoryMLBOrange, Osceola2 hr
Jul 30, 7:29 PM EDTSpecial Weather StatementMLBOsceola46 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023Every severe thunderstorm warning in 2023

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.