Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 45, NWS Melbourne, FL

May 27, 2011Lake County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 27, 2011, 6:43 PM EDT for Lake County, Florida. It was in force for 47 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: May 27, 2011, 6:43 PM EDT (22:43 UTC)
Expired: May 27, 2011, 7:30 PM EDT
In force: 47 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Lake County, FL

The radar

The Melbourne radar (KMLB), 129 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 120 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: 309 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 30 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.

635 
WUUS52 KMLB 272243
SVRMLB
FLC069-272330-
/O.NEW.KMLB.SV.W.0045.110527T2243Z-110527T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
643 PM EDT FRI MAY 27 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 730 PM EDT.

* AT 639 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
  EUSTIS...AND MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  MOUNT DORA...PAISLEY...MOUNT PLYMOUTH 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.

&&

LAT...LON 2897 8179 2896 8166 2900 8166 2905 8148
      2886 8136 2884 8140 2878 8157 2878 8165
      2876 8166 2873 8181 2896 8182
TIME...MOT...LOC 2243Z 258DEG 10KT 2884 8170

$$
BOWEN

1 follow-up statement

234 
WWUS52 KMLB 272319
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
719 PM EDT FRI MAY 27 2011

FLC069-272330-
/O.CON.KMLB.SV.W.0045.000000T0000Z-110527T2330Z/
LAKE-
719 PM EDT FRI MAY 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR CENTRAL LAKE COUNTY...

AT 714 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 MOUNT DORA...MOVING EAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PAISLEY...MOUNT PLYMOUTH...LAKE KATHRYN HEIGHTS AND CASSIA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE NATIONAL WEATHER SERVICE HAS RECEIVED MULTIPLE REPORTS OF 
PEA-SIZED HAIL WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 2897 8179 2896 8166 2900 8166 2905 8148
      2886 8136 2884 8140 2878 8157 2878 8165
      2876 8166 2873 8181 2896 8182
TIME...MOT...LOC 2318Z 258DEG 10KT 2886 8159

$$
BOWEN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 9:49 PM EDT	Areal Flood Advisory	MLB	Lake	56 min
May 27, 1:36 PM EDT	Special Weather Statement	MLB	Indian River	39 min
May 27, 3:04 PM EDT	Special Weather Statement	MLB	Okeechobee	41 min
May 27, 4:04 PM EDT	Special Weather Statement	MLB	Seminole	41 min
May 27, 5:29 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	40 min
May 27, 6:06 PM EDT	Severe Thunderstorm Warning	MLB	Lake	39 min
May 27, 7:06 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	39 min
May 27, 7:30 PM EDT	Areal Flood Advisory	MLB	Lake, Orange	2 hr

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.