Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 74, NWS Melbourne, FL

July 22, 2012Lake County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 22, 2012, 5:05 PM EDT for Lake County, Orange County, Florida. It was in force for 34 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
Jul 22, 2012, 5:05 PM EDT (21:05 UTC)
Expired
Jul 22, 2012, 5:39 PM EDT
In force
34 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Lake County, FL, Orange County, FL

The radar

The Tampa radar (KTBW), 116 km from the middle of the area, began a volume at 21:08 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 12:00Z, 9.1 hours before the alert went out and 116 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, Tampa Bay, FL at 12:00Z on 2012-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2174 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2012-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
2174 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
58 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.

836 
WUUS52 KMLB 222105
SVRMLB
FLC069-095-222200-
/O.NEW.KMLB.SV.W.0074.120722T2105Z-120722T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
505 PM EDT SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL LAKE COUNTY IN FLORIDA
  WEST CENTRAL ORANGE COUNTY IN FLORIDA

* UNTIL 600 PM EDT.

* AT 504 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR WINTER GARDEN...AND MOVING
  WEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  FERNDALE...LAKE LOUISA...CLERMONT...HOWEY IN THE HILLS...GROVELAND
  AND MASCOTTE

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 2878 8196 2865 8152 2840 8157 2841 8196
TIME...MOT...LOC 2105Z 099DEG 18KT 2855 8165

$$

SEDLOCK
2 follow-up statements
377 
WWUS52 KMLB 222120
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
520 PM EDT SUN JUL 22 2012

FLC095-222129-
/O.CAN.KMLB.SV.W.0074.000000T0000Z-120722T2200Z/
ORANGE-
520 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL ORANGE COUNTY IS 
CANCELLED...THOUGH STRONG WINDS OF 30 TO 40 MPH MAY LAST A BIT 
LONGER ALONG WITH HEAVY DOWNPOURS.

LAT...LON 2878 8196 2868 8166 2840 8166 2841 8196
TIME...MOT...LOC 2119Z 091DEG 23KT 2856 8176

$$

FLC069-222200-
/O.CON.KMLB.SV.W.0074.000000T0000Z-120722T2200Z/
LAKE-
520 PM EDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT 
FOR SOUTH-CENTRAL LAKE COUNTY...

AT 516 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR CLERMONT...OR NEAR
FERNDALE...MOVING WEST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GROVELAND...MASCOTTE AND OKAHUMPKA

LAT...LON 2878 8196 2868 8166 2840 8166 2841 8196
TIME...MOT...LOC 2119Z 091DEG 23KT 2856 8176

$$

SEDLOCK
678 
WWUS52 KMLB 222139
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
539 PM EDT SUN JUL 22 2012

FLC069-222149-
/O.CAN.KMLB.SV.W.0074.000000T0000Z-120722T2200Z/
LAKE-
539 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LAKE COUNTY IS
CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND EXITED 
THE WARNING AREA...THUS THE WARNING HAS BEEN CANCELLED. 
HOWEVER...GUSTY WINDS OF 30 TO 40 MPH...HEAVY RAINFALL AND 
OCCASIONAL LIGHTNING WILL STILL BE POSSIBLE THROUGH EARLY EVENING.

LAT...LON 2878 8196 2868 8166 2840 8166 2841 8196
TIME...MOT...LOC 2139Z 091DEG 23KT 2856 8191

$$

SEDLOCK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 2:24 PM EDTSpecial Weather StatementMLBMartin, Saint Lucie51 min
Jul 22, 2:39 PM EDTSevere Thunderstorm WarningMLBIndian River, Saint Lucie52 min
Jul 22, 2:46 PM EDTSpecial Marine WarningMLB89 min
Jul 22, 2:51 PM EDTSpecial Marine WarningMLB84 min
Jul 22, 2:57 PM EDTSpecial Weather StatementMLBBrevard63 min
Jul 22, 3:06 PM EDTSevere Thunderstorm WarningMLBBrevard54 min
Jul 22, 3:09 PM EDTSpecial Weather StatementMLBOkeechobee51 min
Jul 22, 3:34 PM EDTSpecial Weather StatementMLBOsceola41 min
Jul 22, 3:36 PM EDTSpecial Weather StatementMLBBrevard54 min
Jul 22, 3:50 PM EDTSpecial Marine WarningMLB115 min
Jul 22, 3:57 PM EDTSevere Thunderstorm WarningMLBBrevard5 min
Jul 22, 4:04 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola, Seminole, Volusia56 min
Jul 22, 4:16 PM EDTSevere Thunderstorm WarningMLBBrevard26 min
Jul 22, 4:36 PM EDTSpecial Weather StatementMLBLake84 min
Jul 22, 5:15 PM EDTSpecial Weather StatementMLBLake, Volusia90 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012

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.