Alert archive / Florida / Mesoscale Discussions in 2013

Mesoscale Discussion 981

June 6, 201343 counties in Florida; 6 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2013, 4:50 PM EDT for 43 counties in Florida; 6 counties in Georgia. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jun 6, 2013, 4:50 PM EDT (20:50 UTC)
Expired
Jun 6, 2013, 5:45 PM EDT
In force
55 min
Issued by
the Storm Prediction Center
All 49 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Broward County, FL, Charlotte County, FL, Citrus County, FL, Clay County, FL, Collier County, FL, Columbia County, FL, DeSoto County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Glades County, FL, Hamilton County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Martin County, FL, Nassau County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Pasco County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Saint Lucie County, FL, Seminole County, FL, Sumter County, FL, Suwannee County, FL, Union County, FL, Volusia County, FL, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Lanier County, GA, Lowndes County, GA

The radar

The Tampa radar (KTBW), 144 km from the middle of the area, began a volume at 20:52 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

Tampa Bay, FL (KTBW), launched 12:00Z, 8.8 hours before the alert went out and 144 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, Tampa Bay, FL at 12:00Z on 2013-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 398 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, Tampa Bay, FL at 12:00Z on 2013-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 301 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
398 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
301 m²/s²
0-3 km storm-relative helicity
512 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

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
Jun 5, 8:48 PM EDTMesoscale DiscussionSPCCollier, Lee, Miami-Dade, Monroe, Sarasota2 hr
Jun 6, 3:17 AM EDTMesoscale DiscussionSPCBroward, Charlotte, Collier, DeSoto, Glades, Hardee and 13 more118 min
Jun 6, 3:42 AM EDTTornado WatchSPCBrevard, Broward, Charlotte, Citrus, Collier, DeSoto and 23 more7 hr
Jun 6, 6:52 AM EDTMesoscale DiscussionSPCBrevard, Broward, Collier, DeSoto, Glades, Hardee and 16 more83 min
Jun 6, 10:03 AM EDTMesoscale DiscussionSPCBrevard, Broward, Charlotte, Citrus, Collier, DeSoto and 21 more57 min
Jun 6, 10:43 AM EDTTornado WatchSPCAlachua, Baker, Bradford, Brevard, Broward, Charlotte and 38 more11 hr
Jun 6, 1:25 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Brevard, Broward, Charlotte and 37 more65 min
Jun 6, 6:35 PM EDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa115 min
Jun 6, 7:32 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Brevard, Broward, Charlotte and 33 more118 min
Jun 6, 5:54 PM EDTMesoscale DiscussionSPCBryan, Chatham, Effingham, Liberty, Long, McIntosh and 2 more96 min

Nearby

Mesoscale Discussions in Florida, 2013Mesoscale Discussions in Georgia, 2013Every mesoscale discussion in 2013

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.