Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 297

April 8, 200412 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2004, 3:35 PM EDT for 12 counties in Florida. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2004, 3:35 PM EDT (19:35 UTC)
Expired
Apr 8, 2004, 4:30 PM EDT
In force
55 min
Issued by
the Storm Prediction Center

Counties Brevard County, FL, Hardee County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Polk County, FL, Saint Lucie County, FL, Seminole County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.6 hours before the alert went out and 91 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, Cape Canaveral, FL at 12:00Z on 2004-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 213 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, Cape Canaveral, FL at 12:00Z on 2004-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
213 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
790 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 8, 9:50 AM EDTMesoscale DiscussionSPCCalhoun, Gadsden, Holmes, Jackson, Jefferson, Leon and 5 more85 min
Apr 8, 10:10 AM EDTSevere Thunderstorm WatchSPCEscambia, Gadsden, Hamilton, Holmes, Jackson, Leon and 5 more7 hr
Apr 8, 10:16 AM EDTMesoscale DiscussionSPCAlachua, Bradford, Citrus, Clay, Duval, Flagler and 13 more119 min
Apr 8, 10:45 AM EDTSevere Thunderstorm WatchSPCAlachua, Bradford, Citrus, Clay, Flagler, Gilchrist and 11 more6 hr
Apr 8, 12:42 PM EDTMesoscale DiscussionSPCAlachua, Bradford, Citrus, Clay, Flagler, Gilchrist and 11 more2 hr
Apr 8, 1:11 PM EDTMesoscale DiscussionSPCEscambia, Gadsden, Hamilton, Holmes, Jackson, Leon and 5 more2 hr
Apr 8, 3:40 PM EDTMesoscale DiscussionSPCNassau65 min

Nearby

Mesoscale Discussions in Florida, 2004Every mesoscale discussion 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.