Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 63, NWS Melbourne, FL

July 5, 2012Lake County, Orange County, Seminole County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 5, 2012, 7:23 PM EDT for Lake County, Orange County, Seminole County, Florida. It was in force for 21 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 5, 2012, 7:23 PM EDT (23:23 UTC)
Expired
Jul 5, 2012, 7:44 PM EDT
In force
21 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Lake County, FL, Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 111 km from the middle of the area, began a volume at 23:25 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 11.4 hours before the alert went out and 100 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 2012-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 33 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
33 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1305 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
5 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.

402 
WUUS52 KMLB 052323
SVRMLB
FLC069-095-117-060000-
/O.NEW.KMLB.SV.W.0063.120705T2323Z-120706T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
723 PM EDT THU JUL 5 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 800 PM EDT.

* AT 720 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WEKIWA SPRINGS STATE PARK...OR NEAR MOUNT PLYMOUTH...AND MOVING
  NORTH AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  CASSIA

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 2891 8159 2887 8136 2886 8135 2885 8135
      2884 8133 2864 8141 2870 8159
TIME...MOT...LOC 2322Z 187DEG 9KT 2876 8149

$$


WEITLICH
2 follow-up statements
713 
WWUS52 KMLB 052335
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
735 PM EDT THU JUL 5 2012

FLC069-095-117-060000-
/O.CON.KMLB.SV.W.0063.000000T0000Z-120706T0000Z/
SEMINOLE-ORANGE-LAKE-
735 PM EDT THU JUL 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR EAST CENTRAL LAKE...NORTHWESTERN ORANGE AND NORTHWESTERN SEMINOLE
COUNTIES...

AT 729 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ROCK SPRINGS...OR NEAR MOUNT PLYMOUTH...MOVING NORTH AT 
5 TO 10 MPH.

LAT...LON 2887 8136 2886 8135 2885 8136 2884 8133
      2869 8140 2873 8159 2891 8159
TIME...MOT...LOC 2335Z 180DEG 7KT 2878 8150

$$


WEITLICH
189 
WWUS52 KMLB 052344
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
744 PM EDT THU JUL 5 2012

FLC069-095-117-052354-
/O.CAN.KMLB.SV.W.0063.000000T0000Z-120706T0000Z/
SEMINOLE-ORANGE-LAKE-
744 PM EDT THU JUL 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LAKE...
NORTHWESTERN ORANGE AND NORTHWESTERN SEMINOLE COUNTIES IS
CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A
RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND
DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.

LAT...LON 2887 8136 2886 8135 2885 8136 2884 8133
      2869 8140 2873 8159 2891 8159
TIME...MOT...LOC 2344Z 180DEG 7KT 2880 8150

$$


WEITLICH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 2:35 PM EDTSpecial Weather StatementMLBOkeechobee55 min
Jul 5, 4:42 PM EDTSpecial Weather StatementMLBVolusia48 min
Jul 5, 6:59 PM EDTSpecial Weather StatementMLBLake46 min
Jul 5, 7:19 PM EDTSpecial Weather StatementMLBLake41 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.