Alert archive / Florida / Mesoscale Discussions in 2008

Mesoscale Discussion 2120

August 19, 200826 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2008, 11:32 AM EDT for 26 counties in Florida. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Aug 19, 2008, 11:32 AM EDT (15:32 UTC)
Expired
Aug 19, 2008, 1:00 PM EDT
In force
88 min
Issued by
the Storm Prediction Center
All 26 counties

Brevard County, FL, Broward County, FL, Charlotte County, FL, Collier County, FL, DeSoto County, FL, Flagler County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Marion County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Polk County, FL, Saint Lucie County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 90 km from the middle of the area, began a volume at 15:33 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, 3.5 hours before the alert went out and 123 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 2008-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 93 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 2008-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -101 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
93 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-101 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Aug 18, 10:44 PM EDTTornado WatchSPCBrevard, Broward, Charlotte, Collier, DeSoto, Glades and 13 more9 hr
Aug 19, 3:37 AM EDTMesoscale DiscussionSPCBrevard, Broward, Charlotte, Collier, DeSoto, Glades and 13 more53 min
Aug 19, 6:29 AM EDTMesoscale DiscussionSPCBrevard, Broward, Glades, Hardee, Hendry, Highlands and 11 more31 min
Aug 19, 7:05 AM EDTTornado WatchSPCBrevard, Broward, Charlotte, Collier, DeSoto, Glades and 16 more9 hr
Aug 19, 3:04 PM EDTMesoscale DiscussionSPCBrevard, Flagler, Indian River, Lake, Orange, Osceola and 3 more86 min
Aug 19, 3:46 PM EDTTornado WatchSPCBrevard, Flagler, Indian River, Orange, Osceola, Putnam and 3 more9 hr
Aug 19, 7:10 PM EDTMesoscale DiscussionSPCBrevard95 min

Nearby

Mesoscale Discussions in Florida, 2008Every mesoscale discussion in 2008

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.