Alert archive / Florida / Special Weather Statements in 2017

Special Weather Statement, NWS Melbourne, FL

February 8, 20174 counties in Florida

NWS Melbourne, FL issued this special weather statement at Feb 8, 2017, 1:00 AM EST for 4 counties in Florida. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 8, 2017, 1:00 AM EST (06:00 UTC)
Expired: Feb 8, 2017, 2:00 AM EST
In force: 60 min
Issued by: NWS Melbourne, FL

Counties Brevard County, FL, Orange County, FL, Osceola County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 53 km from the middle of the area, began a volume at 06:03 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, 6.0 hours before the alert went out and 136 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 876 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 940 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Feb 7, 10:38 PM EST, 2 hours 22 minutes earlier.

Area forecast discussion, Feb 7, 10:38 PM EST, 2 hours 22 minutes before

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Hazardous weather outlook, Feb 7, 5:11 PM EST, 7 hours 49 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Melbourne FL
511 PM EST Tue Feb 7 2017

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-081000-
Flagler Beach to Volusia-Brevard County Line 0-20 nm-Volusia-
Brevard County Line to Sebastian Inlet 0-20 nm-
Sebastian Inlet to Jupiter Inlet 0-20 nm-Flagler Beach to Volusia-
Brevard County Line 20-60 nm-Volusia-
Brevard County Line to Sebastian Inlet 20-60 nm-
Sebastian Inlet to Jupiter Inlet 20-60 nm-Inland Volusia County-
Northern Lake County-Orange-Seminole-Southern Brevard County-
Osceola-Indian River-Okeechobee-St. Lucie-Martin-
Coastal Volusia County-Southern Lake County-
Northern Brevard County-
511 PM EST Tue Feb 7 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TONIGHT.

.THUNDERSTORM IMPACT...
Isolated thunderstorms will be possible late this afternoon and
toward sunset, especially with any boundary collisions that occur
with the east coast sea breeze from the Cape southward.

A band of showers and storms is then expected to approach Lake
and Volusia counties near to just after midnight and continue
southeastward, as it gradually weakens across east central Florida
overnight. A few stronger storms will be possible as this line of
convection moves into Lake and Volusia counties and through the
I-4 corridor. The main storm threats with this system will be
dangerous cloud to ground lightning, strong wind gusts up to 40 to
50 mph and small hail.

.MARINE THUNDERSTORM GUST IMPACT...
Isolated storms may push offshore, mainly from the Cape southward
late this afternoon and toward sunset, producing wind gusts near
35 knots.

Additional storms approaching Lake and Volusia counties near to
just after midnight will move quickly east to northeast and off
the coast of east central Florida, as the line of convection
shifts southeastward and gradually weakens overnight. Any storms
associated with this system will also be capable of producing wind
gusts of 35 knots or greater, especially as they move offshore
from the Cape northward.

.WIND AND SEA IMPACT...
Winds will increase out of the south to southwest up to 15 to 20
knots offshore from the Cape northward into tonight. Small craft
should exercise caution if venturing into these waters.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
Poor to hazardous boating conditions are expected late in the week
behind a cold front that is expected to move through on Thursday.

.SPOTTER INFORMATION STATEMENT...
Spotters near to north of the Orlando Metro area are requested to
monitor the weather and self activate if needed later tonight.

Weitlich

In the hours before

Local storm report, Feb 7, 9:16 PM EST, 3 hours 44 minutes before

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Special weather statement, Feb 7, 10:55 PM EST, 2 hours 5 minutes before

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Local storm report, Feb 7, 11:54 PM EST, 1 hour 6 minutes before

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Special weather statement, Feb 7, 11:54 PM EST, 1 hour 6 minutes before

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Local storm report, Feb 8, 12:14 AM EST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
1214 AM EST WED FEB 08 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1148 PM     TSTM WND GST     2 NNW ORMOND BEACH      29.30N 81.07W
02/07/2017  M41.00 MPH       VOLUSIA            FL   MESONET

            WIND GUST TO 36KT/41 MPH AT WEATHER UNDERGROUND MESONET
            SITE IN THE ORMOND BEACH AREA.

1201 AM     TSTM WND GST     DAYTONA BEACH AIRPORT   29.17N 81.07W
02/08/2017  M39.00 MPH       VOLUSIA            FL   ASOS

            WIND GUST TO 34KT/39 MPH AT DAYTONA BEACH AIRPORT/KDAB.

&&

15

Special weather statement, Feb 8, 1:00 AM EST, 0 minutes before

Special Weather Statement
National Weather Service Melbourne FL
100 AM EST WED FEB 8 2017

FLZ045>047-053-141-147-080700-
Southern Brevard County FL-Osceola FL-Northern Brevard County FL-
Orange FL-Seminole FL-Coastal Volusia County FL-
100 AM EST WED FEB 8 2017

...SPECIAL WEATHER STATEMENT...

At 1259 AM EST, Doppler radar was tracking strong thunderstorms along
a line extending from near Klondike Beach to Lake Hart to near Lake
Wales. Movement was southeast at 15 mph.

Winds of 35 to 40 mph will be possible with these storms.

Locations impacted include...
Orlando, Melbourne, Kissimmee, Titusville and Oviedo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2896 8081 2860 8054 2846 8049 2839 8056
      2834 8057 2810 8053 2786 8130 2795 8134
      2804 8146 2806 8146 2801 8138 2808 8135
      2809 8145 2814 8146 2814 8152 2820 8152
      2826 8156 2826 8166 2834 8166
TIME...MOT...LOC 0559Z 301DEG 41KT 2879 8071 2839 8122 2793 8164

Sedlock

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 7, 10:55 PM EST	Special Weather Statement	MLB	Lake, Volusia	65 min
Feb 7, 11:01 PM EST	Special Marine Warning	MLB		89 min
Feb 7, 11:54 PM EST	Special Weather Statement	MLB	Lake, Orange, Seminole, Volusia	66 min
Feb 8, 1:06 AM EST	Special Marine Warning	MLB		114 min
Feb 8, 4:06 AM EST	Small Craft Advisory	MLB		57 hr

Nearby

Special Weather Statements in Florida, 2017 Every special weather statement in 2017

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.