Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 92, NWS Melbourne, FL

July 1, 2011Indian River County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 1, 2011, 4:57 PM EDT for Indian River County, Florida. It was in force for 48 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 1, 2011, 4:57 PM EDT (20:57 UTC)
Expired
Jul 1, 2011, 5:45 PM EDT
In force
48 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Indian River County, FL

The radar

The Melbourne radar (KMLB), 53 km from the middle of the area, began a volume at 21:00 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, 9.0 hours before the alert went out and 88 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 2011-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 312 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 2011-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
312 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
-10 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.

625 
WUUS52 KMLB 012057
SVRMLB
FLC061-012145-
/O.NEW.KMLB.SV.W.0092.110701T2057Z-110701T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
457 PM EDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN INDIAN RIVER COUNTY IN FLORIDA

* UNTIL 545 PM EDT.

* AT 455 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR VERO BEACH SOUTH. THIS
  STORM WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  SOUTH BEACH...WINTER BEACH...WABASSO...VERO BEACH HIGHLANDS...VERO
  BEACH...INDIAN RIVER SHORES AND GIFFORD

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 2756 8035 2761 8036 2756 8035 2757 8054
      2770 8059 2778 8044 2771 8040 2775 8040
      2778 8043 2779 8042 2779 8041 2768 8035
      2769 8035 2763 8035 2756 8032
TIME...MOT...LOC 2057Z 231DEG 1KT 2764 8047

$$



BRAGAW
2 follow-up statements
923 
WWUS52 KMLB 012122
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
522 PM EDT FRI JUL 1 2011

FLC061-012145-
/O.CON.KMLB.SV.W.0092.000000T0000Z-110701T2145Z/
INDIAN RIVER-
522 PM EDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN INDIAN RIVER COUNTY...

AT 520 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR PINE TREE PARK...OR
NEAR VERO BEACH SOUTH. THIS STORM WAS NEARLY STATIONARY.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VERO 
BEACH HIGHLANDS...ORCHID...WINTER BEACH...WABASSO BEACH...WABASSO... 
VERO BEACH...JAYCEE BEACH...INDIAN RIVER SHORES...GIFFORD AND DIXIE 
HEIGHTS.

LAT...LON 2756 8035 2761 8036 2756 8035 2757 8054
      2770 8059 2778 8044 2771 8040 2775 8040
      2778 8043 2779 8042 2779 8041 2768 8035
      2769 8035 2763 8035 2756 8032
TIME...MOT...LOC 2121Z 231DEG 1KT 2764 8046

$$



BRAGAW
273 
WWUS52 KMLB 012144
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
544 PM EDT FRI JUL 1 2011

FLC061-012155-
/O.EXP.KMLB.SV.W.0092.000000T0000Z-110701T2145Z/
INDIAN RIVER-
544 PM EDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN INDIAN RIVER
COUNTY HAS EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND EXITED
THE WARNING AREA...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 2756 8035 2761 8036 2756 8035 2757 8054
      2770 8059 2778 8044 2771 8040 2775 8040
      2778 8043 2779 8042 2779 8041 2768 8035
      2769 8035 2763 8035 2756 8032
TIME...MOT...LOC 2145Z 231DEG 1KT 2764 8045

$$



BRAGAW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 3:25 PM EDTSpecial Weather StatementMLBBrevard50 min
Jul 1, 5:16 PM EDTSpecial Marine WarningMLB89 min
Jul 1, 5:18 PM EDTSevere Thunderstorm WarningMLBSaint Lucie42 min
Jul 1, 5:42 PM EDTSpecial Weather StatementMLBOkeechobee63 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011

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.