Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 73, NWS Melbourne, FL

June 17, 2011Lake County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 17, 2011, 6:48 PM EDT for Lake County, Orange County, Florida. It was in force for 57 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: Jun 17, 2011, 6:48 PM EDT (22:48 UTC)
Expired: Jun 17, 2011, 7:45 PM EDT
In force: 57 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Lake County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 115 km from the middle of the area, began a volume at 22:51 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, 10.8 hours before the alert went out and 113 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.

838 
WUUS52 KMLB 172248
SVRMLB
FLC069-095-172345-
/O.NEW.KMLB.SV.W.0073.110617T2248Z-110617T2345Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAKE COUNTY IN FLORIDA
  WESTERN ORANGE COUNTY IN FLORIDA

* UNTIL 745 PM EDT.

* AT 642 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   
  TAVARES...AND MOVING NORTHEAST AT 10 MPH. ADDITIONAL STRONG STORMS 
  ARE DEVELOPING ALONG THE SEA BREEZE COLLISION INSIDE THE WARNING   
  AREA.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  ZELLWOOD...APOPKA...MOUNT DORA...EUSTIS...WEKIWA SPRINGS STATE
  PARK...MOUNT PLYMOUTH...PAISLEY AND 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.

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 2875 8188 2903 8156 2886 8137 2883 8141
      2875 8141 2860 8152 2834 8164 2834 8195
TIME...MOT...LOC 2246Z 226DEG 9KT 2876 8172

$$

BOWEN

1 follow-up statement

430 
WWUS52 KMLB 172346
SVSMLB

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

FLC069-095-172356-
/O.EXP.KMLB.SV.W.0073.000000T0000Z-110617T2345Z/
ORANGE-LAKE-
746 PM EDT FRI JUN 17 2011

...THE SEVERE THUNDERSTORM WARNING FOR LAKE AND WESTERN ORANGE
COUNTIES HAS EXPIRED...

THE SEVERE STORMS THAT PROMPTED THE WARNING HAD WEAKENED...THUS THE 
WARNING HAS BEEN ALLOWED TO EXPIRE. A SPECIAL WEATHER STATEMENT 
REMAINS IN EFFECT FOR SOUTHERN LAKE COUNTY AND WESTERN ORANGE COUNTY.

LAT...LON 2875 8188 2903 8156 2886 8137 2883 8141
      2875 8141 2860 8152 2834 8164 2834 8195
TIME...MOT...LOC 2248Z 226DEG 9KT 2876 8172

$$

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, 6:36 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	54 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.