Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 39, NWS Melbourne, FL

June 19, 2015Seminole County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 19, 2015, 6:01 PM EDT for Seminole County, Volusia County, Florida. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 19, 2015, 6:01 PM EDT (22:01 UTC)
Expired: Jun 19, 2015, 6:45 PM EDT
In force: 44 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 97 km from the middle of the area, began a volume at 22:02 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.

What was reported inside it

Time	Report	Where	Remark
Jun 19, 6:15 PM EDT	TSTM WND DMG	5 Ene Altamonte Springs, FL	SEMINOLE COUNTY EMERGENCY MANAGEMENT REPORTED SEVERAL POWERLINES AND FENCES DOWN IN LAKE KATHRYN ESTATES ALONG WITH NUMEROUS TREE LIMBS SNAPPED. A CARPORT AWNING WAS ALSO RIPPED OFF OF A MOBILE HOME WITHIN THE COMMUNITY. A LARGE TREE FELL ON A NEARBY HOUSE JUS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.0 hours before the alert went out and 81 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: 2078 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 800 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

712 
WUUS52 KMLB 192201
SVRMLB
FLC117-127-192245-
/O.NEW.KMLB.SV.W.0039.150619T2201Z-150619T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
601 PM EDT FRI JUN 19 2015

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL VOLUSIA COUNTY IN EAST CENTRAL FLORIDA...
  CENTRAL SEMINOLE COUNTY IN EAST CENTRAL FLORIDA...

* UNTIL 645 PM EDT

* AT 600 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED OVER OSTEEN...OR NEAR DELTONA...AND MOVING SOUTH AT 10
  MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  DELTONA...SANFORD...OVIEDO...WINTER SPRINGS AND CASSELBERRY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...EXCESSIVE CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 2893 8129 2891 8108 2868 8112 2869 8135
TIME...MOT...LOC 2200Z 015DEG 9KT 2883 8120 

$$

BRAGAW

1 follow-up statement

687 
WWUS52 KMLB 192241
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
641 PM EDT FRI JUN 19 2015

FLC117-127-192250-
/O.EXP.KMLB.SV.W.0039.000000T0000Z-150619T2245Z/
VOLUSIA FL-SEMINOLE FL-
641 PM EDT FRI JUN 19 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL VOLUSIA AND
CENTRAL SEMINOLE COUNTIES WILL EXPIRE AT 645 PM EDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER 
GUSTY WINDS AND HEAVY RAIN WILL CONTINUE THROUGH 715 PM WITH THIS 
THUNDERSTORM.

LAT...LON 2893 8129 2891 8108 2868 8112 2869 8135
TIME...MOT...LOC 2237Z 015DEG 9KT 2883 8120 

$$

BRAGAW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 3:52 PM EDT	Special Weather Statement	MLB	Okeechobee	38 min
Jun 19, 4:38 PM EDT	Special Weather Statement	MLB	Martin	37 min
Jun 19, 4:49 PM EDT	Special Weather Statement	MLB	Orange	86 min
Jun 19, 5:32 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Seminole	28 min
Jun 19, 5:44 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	46 min
Jun 19, 5:46 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Seminole	59 min
Jun 19, 5:57 PM EDT	Severe Thunderstorm Warning	MLB	Orange	48 min
Jun 19, 6:36 PM EDT	Special Weather Statement	MLB	Flagler	24 min
Jun 19, 7:01 PM EDT	Areal Flood Advisory	MLB	Osceola	89 min
Jun 19, 7:17 PM EDT	Special Weather Statement	MLB	Orange	58 min
Jun 19, 7:30 PM EDT	Special Marine Warning	MLB		90 min
Jun 19, 7:31 PM EDT	Special Weather Statement	MLB	Brevard	59 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.