Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Melbourne, FL

June 1, 2015Orange County, Seminole County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 1, 2015, 4:16 PM EDT for Orange County, Seminole County, Florida. It was in force for 59 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 1, 2015, 4:16 PM EDT (20:16 UTC)
Expired: Jun 1, 2015, 5:15 PM EDT
In force: 59 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 104 km from the middle of the area, began a volume at 20:20 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 1, 4:20 PM EDT	HAIL 1	3 Nw Altamonte Springs, FL	CORRECTED STORM REPORT. SKYWARN SPOTTER REPORTED NICKEL TO QUARTER SIZED HAIL IN WEKIVA SPRINGS.

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, 8.3 hours before the alert went out and 99 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: 1368 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 53 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.

900 
WUUS52 KMLB 012016
SVRMLB
FLC095-117-012115-
/O.NEW.KMLB.SV.W.0021.150601T2016Z-150601T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
416 PM EDT MON JUN 1 2015

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ORANGE COUNTY IN EAST CENTRAL FLORIDA...
  SOUTHWESTERN SEMINOLE COUNTY IN EAST CENTRAL FLORIDA...

* UNTIL 515 PM EDT

* AT 415 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR LONGWOOD. THIS STORM WAS
  DRIFTING SOUTHWEST.

* LOCATIONS IMPACTED INCLUDE...
  ORLANDO...APOPKA...ALTAMONTE SPRINGS...OCOEE AND WINTER GARDEN. 

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.

THIS STORM HAS A HISTORY OF PRODUCING QUARTER SIZED HAIL OVER LAKE 
MARY AND LONGWOOD. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND 
STAY AWAY FROM WINDOWS.

IF ON OR NEAR LAKE APOPKA...GET OUT OF THE WATER AND MOVE INDOORS OR 
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES 
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE 
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. DO 
NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

&&

LAT...LON 2879 8148 2878 8142 2879 8141 2872 8129
      2845 8150 2857 8165 2864 8166
TIME...MOT...LOC 2015Z 040DEG 4KT 2873 8139 

$$

MOSES

2 follow-up statements

403 
WWUS52 KMLB 012042
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
442 PM EDT MON JUN 1 2015

FLC095-117-012115-
/O.CON.KMLB.SV.W.0021.000000T0000Z-150601T2115Z/
ORANGE FL-SEMINOLE FL-
442 PM EDT MON JUN 1 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN ORANGE AND SOUTHWESTERN SEMINOLE COUNTIES...

AT 441 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER LOCKHART...MOVING SOUTHWEST AT 15
MPH.

QUARTER SIZED WAS REPORTED WITH THIS STORM IN WEKIVA SPRINGS AT 420 
PM.

LOCATIONS IMPACTED INCLUDE... 
ORLANDO...APOPKA...CLARCONA...ALTAMONTE SPRINGS...PLYMOUTH...OCOEE 
AND WINTER GARDEN. 

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.

IF ON OR NEAR LAKE APOPKA...GET OUT OF THE WATER AND MOVE INDOORS OR 
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES 
FROM THE PARENT THUNDERSTORM.  IF YOU CAN HEAR THUNDER...YOU ARE 
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. 
DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 2879 8148 2869 8131 2845 8150 2857 8165
      2864 8166
TIME...MOT...LOC 2041Z 024DEG 11KT 2862 8144 

$$

MOSES

703 
WWUS52 KMLB 012113
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
513 PM EDT MON JUN 1 2015

FLC095-117-012123-
/O.EXP.KMLB.SV.W.0021.000000T0000Z-150601T2115Z/
ORANGE FL-SEMINOLE FL-
513 PM EDT MON JUN 1 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ORANGE AND
SOUTHWESTERN SEMINOLE COUNTIES WILL EXPIRE AT 515 PM EDT...
                
THE STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER 
SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH 
THESE THUNDERSTORMS.

LAT...LON 2879 8148 2869 8131 2845 8150 2857 8165
      2864 8166
TIME...MOT...LOC 2111Z 040DEG 4KT 2862 8144 

$$

MOSES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 4:55 AM EDT	Rip Current Statement	MLB	Volusia	16 hr
Jun 1, 2:49 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	41 min
Jun 1, 3:28 PM EDT	Severe Thunderstorm Warning	MLB	Seminole, Volusia	62 min
Jun 1, 4:34 PM EDT	Areal Flood Advisory	MLB	Orange, Seminole, Volusia	116 min
Jun 1, 4:38 PM EDT	Special Weather Statement	MLB	Seminole	52 min
Jun 1, 5:17 PM EDT	Special Weather Statement	MLB	Lake	58 min
Jun 1, 5:32 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	43 min
Jun 1, 6:08 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Osceola	37 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.