Alert archive / Florida / Mesoscale Discussions in 2016
Mesoscale Discussion 26
The Storm Prediction Center issued this mesoscale discussion at Jan 17, 2016, 5:08 AM EST for 21 counties in Florida. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 17, 2016, 5:08 AM EST (10:08 UTC)
- Expired
- Jan 17, 2016, 7:15 AM EST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Brevard County, FL, Broward County, FL, Charlotte County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Indian River County, FL, Lee 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
The radar
The Tampa radar (KTBW), 145 km from the middle of the area, began a volume at 10:08 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 00:00Z, 10.1 hours before the alert went out and 145 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
778
ACUS11 KWNS 171008
SWOMCD
SPC MCD 171008
FLZ000-171215-
MESOSCALE DISCUSSION 0026
NWS STORM PREDICTION CENTER NORMAN OK
0408 AM CST SUN JAN 17 2016
AREAS AFFECTED...PORTIONS OF CENTRAL AND SOUTHERN FL
CONCERNING...TORNADO WATCH 4...
VALID 171008Z - 171215Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 4 CONTINUES.
SUMMARY...DAMAGING WINDS AND A FEW TORNADOES WILL BE POSSIBLE ACROSS
SOUTHERN FL THE NEXT FEW HOURS AS A LINE OF THUNDERSTORMS MOVES
ONSHORE THE SOUTHWESTERN FL COAST/WESTERN KEYS.
DISCUSSION...THE NEAR-TERM TORNADO THREAT WILL BE GREATEST ACROSS
SOUTHWESTERN FL AND THE WESTERN FL KEYS THE NEXT FEW HOURS AS THE
MAIN LINE OF THUNDERSTORMS MOVES ONSHORE. WHILE STORMS EARLIER WERE
MAINLY SEMI-DISCRETE...CONVECTIVE MODE HAS NOW SHIFTED TOWARD BOWING
LINE SEGMENTS WITH EMBEDDED MESOVORTICES...A FEW OF WHICH HAVE BEEN
NOTED OFFSHORE COLLIER COUNTY. THE LATEST VWP FROM BYX AND AMX
CONTINUE TO SHOW STRONG SPEED SHEAR...BUT WINDS IN THE LOWEST 1 KM
HAVE VEERED MORE TOWARD THE S/SW...AND SOME ADDITIONAL VEERING IS
EXPECTED INTO THE MORNING HOURS. SURFACE DEWPOINTS IN THE MID UPPER
60S TO NEAR 70 F HAVE RESULTED IN BETTER INSTABILITY THAN FURTHER
NORTH...WITH MLCAPE BETWEEN 500-1000 J/KG. GIVEN CONVECTIVE MODE AND
EVOLVING SHEAR PROFILES...DAMAGING WINDS AND A FEW MESOVORTEX
TORNADOES STILL WILL BE POSSIBLE THE FEW HOURS...ESPECIALLY ACROSS
SOUTH FL.
..LEITMAN.. 01/17/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MFL...MLB...KEY...TBW...
LAT...LON 25578250 26948207 28388161 28958137 28998048 24377954
24398225 25578250SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 16, 11:03 PM EST | Mesoscale Discussion | SPC | Charlotte, Collier, DeSoto, Glades, Hardee, Hendry and 7 more | 117 min |
| Jan 17, 12:47 AM EST | Tornado Watch | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 25 more | 8 hr |
| Jan 17, 2:31 AM EST | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 24 more | 89 min |
| Jan 17, 6:38 AM EST | Mesoscale Discussion | SPC | Broward, Miami-Dade, Monroe, Palm Beach | 97 min |
Nearby
Mesoscale Discussions in Florida, 2016Every mesoscale discussion in 2016
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.