Alert archive / Florida / Mesoscale Discussions in 2016
Mesoscale Discussion 27
The Storm Prediction Center issued this mesoscale discussion at Jan 17, 2016, 6:38 AM EST for 4 counties in Florida. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Jan 17, 2016, 6:38 AM EST (11:38 UTC)
- Expired
- Jan 17, 2016, 8:15 AM EST
- In force
- 97 min
- Issued by
- the Storm Prediction Center
Counties Broward County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 24 km from the middle of the area, began a volume at 11:39 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
Miami, FL (KMFL), launched 00:00Z, 11.6 hours before the alert went out and 20 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1689 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
172
ACUS11 KWNS 171138
SWOMCD
SPC MCD 171138
FLZ000-171315-
MESOSCALE DISCUSSION 0027
NWS STORM PREDICTION CENTER NORMAN OK
0538 AM CST SUN JAN 17 2016
AREAS AFFECTED...SOUTH FLORIDA
CONCERNING...TORNADO WATCH 4...
VALID 171138Z - 171315Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 4 CONTINUES.
SUMMARY...STRONG/DAMAGING WINDS AND A TORNADO OR TWO WILL BE
POSSIBLE ACROSS SOUTH FL THROUGH AROUND 13-14Z. A LOCAL EXTENSION IN
TIME FOR TORNADO WATCH 4 MAY BE NEEDED IF STORMS HAVE NOT MOVED
OFFSHORE BY 13Z.
DISCUSSION...THE LINE OF THUNDERSTORMS EXTENDING FROM NEAR LAKE
OKEECHOBEE SOUTH/SOUTHWEST TO NEAR KEY WEST AT 1130Z THIS MORNING
WILL CONTINUE TO TRACK TO THE EAST/NORTHEAST AT AROUND 50 KT. THIS
WILL BRING THE LINE TO VERY NEAR THE SOUTHEAST FL COAST AROUND 13Z
WHEN TORNADO WATCH 4 IS SET TO EXPIRE. GIVEN THAT THE THERMODYNAMIC
AND KINEMATIC PARAMETERS OF THE BOUNDARY LAYER AHEAD OF THE LINE
WILL CONTINUE TO SUPPORT A STRONG/DAMAGING WIND AND ISOLATED TORNADO
THREAT...A FEW COUNTIES IN SOUTH FL IN THE MIAMI AND KEY WEST CWA/S
MAY NEED A LOCAL EXTENSION IN TIME THROUGH 14Z. THEREAFTER...STORMS
SHOULD BE OFFSHORE AND THE THREAT WILL QUICKLY DIMINISH BEHIND THE
CONVECTIVE LINE.
..LEITMAN.. 01/17/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MFL...MLB...KEY...
LAT...LON 26698002 25937987 25557988 25088014 24728053 24428092
24408189 25538142 26888070 26978039 26968009 26698002SPC 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, 5:08 AM EST | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 15 more | 2 hr |
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.