Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 71, NWS Melbourne, FL

June 17, 2011Lake County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 17, 2011, 6:36 PM EDT for Lake County, Volusia County, Florida. It was in force for 54 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 17, 2011, 6:36 PM EDT (22:36 UTC)
Expired: Jun 17, 2011, 7:30 PM EDT
In force: 54 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Lake County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 115 km from the middle of the area, began a volume at 22:38 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 17, 7:30 PM EDT	TSTM WND GST 60	5 W Daytona Beach, FL	SPOTTER REPORTED ESTIMATED WINDS GUSTS OF 60 MPH NEAR INTERSECTION OF TOURNAMENT DRIVE AND LPGA BOULEVARD.

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, 10.6 hours before the alert went out and 97 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: 587 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1402 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -2 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.

676 
WUUS52 KMLB 172236
SVRMLB
FLC069-127-172330-
/O.NEW.KMLB.SV.W.0071.110617T2236Z-110617T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
636 PM EDT FRI JUN 17 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL LAKE COUNTY IN FLORIDA
  CENTRAL VOLUSIA COUNTY IN FLORIDA

* UNTIL 730 PM EDT.

* AT 633 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
  DELAND...AND MOVING NORTHEAST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  DE LAND...LAKE HELEN...DE LEON SPRINGS AND DELEON SPRINGS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 2912 8102 2884 8135 2887 8136 2883 8141
      2879 8141 2878 8142 2890 8160 2927 8127
      2927 8118
TIME...MOT...LOC 2236Z 227DEG 7KT 2905 8133

$$

BOWEN

1 follow-up statement

890 
WWUS52 KMLB 172315
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
715 PM EDT FRI JUN 17 2011

FLC069-127-172330-
/O.CON.KMLB.SV.W.0071.000000T0000Z-110617T2330Z/
LAKE-VOLUSIA-
715 PM EDT FRI JUN 17 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR CENTRAL VOLUSIA AND EAST CENTRAL LAKE COUNTIES...

AT 710 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STRONGEST STORM WAS 
LOCATED NEAR DAYTONA HIGHRIDGE ESTATES...OR 7 MILES WEST OF PORT 
ORANGE...MOVING NORTHEAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TIGER
BAY STATE FOREST

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 2912 8102 2884 8135 2887 8136 2883 8141
      2879 8141 2878 8142 2890 8160 2927 8127
      2927 8118
TIME...MOT...LOC 2314Z 227DEG 7KT 2911 8113

$$

BOWEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 2:55 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	50 min
Jun 17, 3:41 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	49 min
Jun 17, 3:47 PM EDT	Special Weather Statement	MLB	Okeechobee	58 min
Jun 17, 4:06 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	39 min
Jun 17, 4:14 PM EDT	Severe Thunderstorm Warning	MLB	Martin	31 min
Jun 17, 4:45 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	44 min
Jun 17, 5:15 PM EDT	Special Weather Statement	MLB	Orange	60 min
Jun 17, 5:49 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	56 min
Jun 17, 6:02 PM EDT	Severe Thunderstorm Warning	MLB	Seminole, Volusia	58 min
Jun 17, 6:11 PM EDT	Special Weather Statement	MLB	Lake	49 min
Jun 17, 6:48 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	57 min
Jun 17, 7:02 PM EDT	Special Marine Warning	MLB		118 min
Jun 17, 7:17 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	42 min
Jun 17, 7:32 PM EDT	Special Weather Statement	MLB	Volusia	43 min
Jun 17, 7:41 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	2 hr
Jun 17, 7:41 PM EDT	Special Weather Statement	MLB	Lake	49 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.