Alert archive / Florida / Mesoscale Discussions in 2016
Mesoscale Discussion 331
The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2016, 11:39 PM EDT for 13 counties in Florida. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Apr 1, 2016, 11:39 PM EDT (03:39 UTC)
- Expired
- Apr 2, 2016, 12:45 AM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
Counties Baker County, FL, Bradford County, FL, Columbia County, FL, Franklin County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL
The radar
The Moody AFB radar (KVAX), 87 km from the middle of the area, began a volume at 03:39 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
Jacksonville, FL (KJAX), launched 00:00Z, 3.7 hours before the alert went out and 152 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
- 1190 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 3.5
The text
As transmitted.
127
ACUS11 KWNS 020340
SWOMCD
SPC MCD 020339
FLZ000-GAZ000-020445-
MESOSCALE DISCUSSION 0331
NWS STORM PREDICTION CENTER NORMAN OK
1039 PM CDT FRI APR 01 2016
AREAS AFFECTED...ERN PANHANDLE/NRN FL
CONCERNING...TORNADO WATCH 76...
VALID 020339Z - 020445Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 76 CONTINUES.
SUMMARY...THE RISK FOR DAMAGING WINDS AND A BRIEF TORNADO MAY
INCREASE INTO THE EARLY MORNING WITH A QLCS MOVING E FROM THE ERN
PANHANDLE.
DISCUSSION...A QLCS EXTENDED FROM GRADY COUNTY GA TO GULF COUNTY FL
AS OF 0330Z. MEASURED GUSTS WITH THE LINE HAVE GENERALLY BEEN IN THE
20-30 KT RANGE ALONG THE PANHANDLE COAST OVER THE PAST COUPLE HOURS.
THIS LINE MAY INTENSIFY SLIGHTLY AS IT ABOUT TO OVERTAKE THE REMNANT
W/E-ORIENTED OUTFLOW BOUNDARY FROM FRANKLIN TO CLAY COUNTIES. WITH
LOWER 70S SURFACE DEW POINTS PREVALENT S OF THE OUTFLOW...A
COMPARATIVELY GREATER LOW-LEVEL LAPSE RATE COULD FOSTER INCREASED
DOWNWARD MOMENTUM TRANSPORT. TLH/JAX VWP DATA SAMPLED VERY STRONG
DEEP-LAYER SHEAR WITH 0-6 KM VALUES AOA 70 KT...WHICH SHOULD SUPPORT
TRANSIENT MESOVORTICES IN SPITE OF LIMITED INSTABILITY.
..GRAMS.. 04/02/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAX...TAE...
LAT...LON 30588425 30608366 30478260 30398206 30198184 30038182
29928204 29818277 29708333 29628490 29698513 30588425SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 9:02 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 21 more | 9 hr |
| Apr 2, 2:19 AM EDT | Mesoscale Discussion | SPC | Dixie, Gilchrist, Lafayette, Taylor | 56 min |
| Apr 2, 4:18 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 15 more | 117 min |
| Apr 2, 6:00 AM EDT | Severe Thunderstorm Watch | SPC | Alachua, Bradford, Citrus, Clay, Flagler, Gilchrist and 12 more | 7 hr |
| Apr 2, 8:42 AM EDT | Mesoscale Discussion | SPC | Hernando, Pasco, Pinellas | 93 min |
| Apr 2, 12:01 PM EDT | Mesoscale Discussion | SPC | Hernando, Lake, Orange, Pasco, Seminole, Sumter and 1 more | 59 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.