Alert archive / Florida / Mesoscale Discussions in 2013
Mesoscale Discussion 976
The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2013, 6:52 AM EDT for 22 counties in Florida. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2013, 6:52 AM EDT (10:52 UTC)
- Expired
- Jun 6, 2013, 8:15 AM EDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 22 counties
Brevard County, FL, Broward County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Indian River County, FL, Lake 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
The radar
The Miami radar (KAMX), 148 km from the middle of the area, began a volume at 10:56 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 10.9 hours before the alert went out and 135 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.
- Mixed-layer CAPE
- 1865 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 618 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
603
ACUS11 KWNS 061053
SWOMCD
SPC MCD 061052
FLZ000-061215-
MESOSCALE DISCUSSION 0976
NWS STORM PREDICTION CENTER NORMAN OK
0552 AM CDT THU JUN 06 2013
AREAS AFFECTED...CNTRL AND SRN FL
CONCERNING...TORNADO WATCH 282...
VALID 061052Z - 061215Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 282 CONTINUES.
SUMMARY...GREATEST THREAT FOR ISOLATED TORNADOES WILL REMAIN ACROSS
THE ERN PORTION OF THE CNTRL AND SRN FL PENINSULA THROUGH 13Z. THERE
APPEARS TO BE AT LEAST A TEMPORARY LULL IN THE SEVERE THREAT OVER
MUCH OF THE WRN HALF OF WW 282.
DISCUSSION...BAND OF LOW TOPPED SUPERCELLS ALONG ONE OF THE OUTER
BANDS OF TROPICAL STORM ANDREA HAS SHIFTED INTO THE ERN THIRD OF THE
FL PENINSULA. WHAT APPEARS TO BE A MID-LEVEL MESOSCALE CIRCULATION
IS EMBEDDED WITHIN THE NRN END OF THIS BAND. LARGE HODOGRAPHS
CONTINUE TO BE OBSERVED WITH VWP DATA ALONG AND AHEAD OF THIS BROKEN
LINE OF CONVECTION. ISOLATED TORNADOES WILL REMAIN A POSSIBILITY AS
THIS ACTIVITY CONTINUES EWD AND EVENTUALLY OFFSHORE.
TAMPA BAY VWP INDICATE HODOGRAPHS ARE STILL FAVORABLE FOR LOW-LEVEL
MESOCYCLONES. HOWEVER...SUBSIDENCE APPEARS TO BE OCCURRING OVER THE
WRN HALF OF THE CNTRL AND SRN FL PENINSULA IN WAKE OF INITIAL LINE
OF STORMS. DEEPER CONVECTION MIGHT REMAIN SUPPRESSED OVER A LARGE
PART OF THE WRN TWO THIRDS OF THE PENINSULA UNTIL SECONDARY BAND
OVER THE ERN GULF APPROACHES THE WRN FL COAST AROUND 14-15Z.
..DIAL.. 06/06/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MFL...MLB...TBW...
LAT...LON 25348100 25708125 26228186 26688193 27558221 28808268
28888090 28258049 27067999 26038000 25448031 25348100SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 8:48 PM EDT | Mesoscale Discussion | SPC | Collier, Lee, Miami-Dade, Monroe, Sarasota | 2 hr |
| Jun 6, 3:17 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 13 more | 118 min |
| Jun 6, 3:42 AM EDT | Tornado Watch | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 23 more | 7 hr |
| Jun 6, 10:03 AM EDT | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 21 more | 57 min |
| Jun 6, 10:43 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Broward, Charlotte and 38 more | 11 hr |
| Jun 6, 1:25 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Broward, Charlotte and 37 more | 65 min |
| Jun 6, 4:50 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Broward, Charlotte and 37 more | 55 min |
| Jun 6, 6:35 PM EDT | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 115 min |
| Jun 6, 7:32 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Broward, Charlotte and 33 more | 118 min |
Nearby
Mesoscale Discussions in Florida, 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.