Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 3, NWS Melbourne, FL

February 12, 20145 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Feb 12, 2014, 5:23 PM EST for 5 counties in Florida. It was in force for 52 min. 5 reports 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
Feb 12, 2014, 5:23 PM EST (22:23 UTC)
Expired
Feb 12, 2014, 6:15 PM EST
In force
52 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Brevard County, FL, Lake County, FL, Orange County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 89 km from the middle of the area, began a volume at 22:22 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

TimeReportWhereRemark
Feb 12, 5:25 PM ESTHAIL 1Mount Dora, FLSOCIAL MEDIA REPORT OF QUARTER SIZE HAIL IN MOUNT DORA.
Feb 12, 5:28 PM ESTTSTM WND GST 43Oakland, FLPUBLIC WEATHER STATION MEASURED WIND GUST OF 38 KT/43 MPH.
Feb 12, 5:50 PM ESTTSTM WND DMG4 N Altamonte Springs, FLTREES UP TO ONE FOOT DIAMETER DOWN. FENCES DOWN IN MIDDLE OF ROAD AND OTHER DEBRIS NEAR INTERSECTION OF E E WILLIAMSON RD AND MARKHAM WOODS RD. IN LONGWOOD
Feb 12, 5:50 PM ESTTSTM WND DMGLongwood, FLWFTV BROADCAST MEDIA RELAYED AN IMAGE VIA SOCIAL MEDIA OF A LARGE TREE DOWN IN LONGWOOD. TIME ESTIMATED VIA RADAR.
Feb 12, 6:08 PM ESTTSTM WND DMG2 Ssw Saint Cloud, FLAFTER EXAMINING PHOTOS AND INFORMATION PROVIDED BY EMERGENCY MANAGEMENT OFFICIALS AND WSR-88D RADAR DATA...IT HAS BEEN DETERMINED THAT STRAIGHT LINE WESTERLY WINDS OF 60-75 MPH PRODUCED THE DAMAGE IN SAINT CLOUD WEDNESDAY EVENING. THE DAMAGING WINDS OCCURRED A

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 12, 3:06 PM ESTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.4 hours before the alert went out and 68 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-pSkew-T log-p diagram, Cape Canaveral, FL at 12:00Z on 2014-02-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2014-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1180 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

306 
WUUS52 KMLB 122223
SVRMLB
FLC009-069-095-117-127-122315-
/O.NEW.KMLB.SV.W.0003.140212T2223Z-140212T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
523 PM EST WED FEB 12 2014

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BREVARD COUNTY IN FLORIDA
  EASTERN LAKE COUNTY IN FLORIDA
  ORANGE COUNTY IN FLORIDA
  SEMINOLE COUNTY IN FLORIDA
  VOLUSIA COUNTY IN FLORIDA

* UNTIL 615 PM EST.

* AT 520 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND   
DAMAGING WINDS IN EXCESS OF 60 MPH FROM CLERMONT TO TAVARES. THESE 
STORMS STORM WERE MOVING EAST AT 45 TO 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED 
TO...  ORLANDO...APOPKA...OAK RIDGE...PINE HILLS...MOUNT 
PLYMOUTH...WINDEREMERE...LOCKHART...PINE CASTLE...FOREST CITY... AND 
WEKIWA SPRINGS STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

&&

LAT...LON 2897 8177 2896 8166 2905 8166 2927 8102
      2908 8093 2907 8090 2903 8089 2868 8064
      2867 8066 2871 8070 2874 8071 2881 8078
      2885 8078 2885 8081 2870 8071 2867 8067
      2835 8136 2836 8183
TIME...MOT...LOC 2220Z 251DEG 46KT 2872 8162

$$


15
1 follow-up statement
118 
WWUS52 KMLB 122238
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
538 PM EST WED FEB 12 2014

FLC009-069-095-117-127-122315-
/O.CON.KMLB.SV.W.0003.000000T0000Z-140212T2315Z/
SEMINOLE-ORANGE-LAKE-BREVARD-VOLUSIA-
538 PM EST WED FEB 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EST
FOR VOLUSIA...NORTHWESTERN BREVARD...EASTERN LAKE...ORANGE AND
SEMINOLE COUNTIES...

AT 534 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR MOUNT DORA...MOVING EAST AT 45 MPH.

A PUBLIC REPORT OF QUARTER SIZE HAIL WAS RECEIVED FROM MOUNT DORA AT 
530 PM.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
MOUNT PLYMOUTH...CASSIA...DE BARY...ORANGE CITY...DELTONA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EST
WEDNESDAY EVENING FOR EASTERN FLORIDA.

&&

LAT...LON 2897 8177 2896 8166 2905 8166 2927 8102
      2908 8093 2907 8090 2903 8089 2868 8064
      2867 8066 2871 8070 2874 8071 2881 8078
      2885 8078 2885 8081 2870 8071 2867 8067
      2835 8136 2836 8183
TIME...MOT...LOC 2235Z 249DEG 40KT 2883 8154

$$


15

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 12, 4:11 AM ESTSmall Craft AdvisoryMLB48 hr
Feb 12, 4:11 AM ESTSmall Craft Advisory for WindsMLB42 hr
Feb 12, 4:00 PM ESTSpecial Weather StatementMLBLake90 min
Feb 12, 4:43 PM ESTSevere Thunderstorm WarningMLBLake, Orange62 min
Feb 12, 5:14 PM ESTSpecial Marine WarningMLB2 hr
Feb 12, 5:22 PM ESTSpecial Weather StatementMLBMartin, Saint Lucie38 min
Feb 12, 5:35 PM ESTSevere Thunderstorm WarningMLBSaint Lucie40 min
Feb 12, 5:45 PM ESTSpecial Weather StatementMLBOsceola60 min
Feb 12, 5:49 PM ESTSevere Thunderstorm WarningMLBOsceola41 min
Feb 12, 6:06 PM ESTSevere Thunderstorm WarningMLBMartin, Saint Lucie39 min
Feb 12, 6:14 PM ESTSpecial Marine WarningMLB2 hr
Feb 12, 6:15 PM ESTSevere Thunderstorm WarningMLBBrevard, Orange, Osceola, Seminole, Volusia60 min
Feb 12, 6:32 PM ESTSpecial Weather StatementMLBIndian River, Okeechobee58 min
Feb 12, 6:54 PM ESTSevere Thunderstorm WarningMLBBrevard, Indian River, Okeechobee, Osceola51 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014Every severe thunderstorm warning in 2014

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.