Alert archive / Florida / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 21, NWS Melbourne, FL

April 26, 2010Indian River County, Martin County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 26, 2010, 3:07 AM EDT for Indian River County, Martin County, Saint Lucie County, Florida. It was in force for 23 min. 3 reports 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: Apr 26, 2010, 3:07 AM EDT (07:07 UTC)
Expired: Apr 26, 2010, 3:30 AM EDT
In force: 23 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Indian River County, FL, Martin County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 76 km from the middle of the area, began a volume at 07:08 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
Apr 26, 3:15 AM EDT	TSTM WND DMG	Vero Beach, FL	STRONG WINDS BLEW ARM OF A CRANE INTO POWER LINES, TAKING THEM DOWN. EVENT OCCURRED AT A FLORIDA DOT CONSTRUCTION SITE ON SOUTH SIDE OF VERO BEACH, SOUTH OF THE INTERSECTION OF 4TH STREET AND U.S. 1. REPORT FROM SCRIPPS TREASURE COAST NEWSPAPER.
Apr 26, 3:15 AM EDT	TSTM WND GST 50	Port Saint Lucie, FL	SPOTTER REPORT FROM SW PORT SAINT LUCIE BLVD AND SW PAAR DRIVE.
Apr 26, 3:19 AM EDT	TSTM WND DMG	Vero Beach, FL	TREE ON HOUSE - DAMAGE TO ROOF

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 25, 11:28 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 7.1 hours before the alert went out and 111 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: 1294 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

465 
WUUS52 KMLB 260707
SVRMLB
FLC061-085-111-260730-
/O.NEW.KMLB.SV.W.0021.100426T0707Z-100426T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
307 AM EDT MON APR 26 2010

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN INDIAN RIVER COUNTY IN FLORIDA
  NORTHEASTERN MARTIN COUNTY IN FLORIDA
  ST. LUCIE COUNTY IN FLORIDA

* UNTIL 330 AM EDT.

* AT 303 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM INDIAN RIVER SHORES TO LAKEWOOD PARK TO 9 MILES WEST OF       
   SAINT LUCIE WEST...MOVING SOUTHEAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED       
  TO...SAINT LUCIE VILLAGE...FORT PIERCE...FORT PIERCE               
 INLET...INDIAN RIVER ESTATES...PLANT...WALTON...PALM CITY...JENSEN 
BEACH...STUART...PORT SALERNO AND HOBE SOUND BEACH

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT MONDAY MORNING FOR
EAST CENTRAL FLORIDA.

&&

LAT...LON 2725 8066 2763 8054 2778 8044 2771 8040
      2771 8039 2778 8043 2782 8042 2768 8035
      2769 8035 2762 8034 2754 8030 2744 8027
      2720 8016 2717 8016 2716 8019 2715 8015
      2708 8012
TIME...MOT...LOC 0706Z 312DEG 38KT 2772 8032 2753 8039
          2727 8051

$$


MOSES

1 follow-up statement

476 
WWUS52 KMLB 260734
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
334 AM EDT MON APR 26 2010

FLC061-085-111-260742-
/O.EXP.KMLB.SV.W.0021.000000T0000Z-100426T0730Z/
MARTIN-ST. LUCIE-INDIAN RIVER-
334 AM EDT MON APR 26 2010

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN INDIAN RIVER...ST.
LUCIE AND NORTHEASTERN MARTIN COUNTIES HAS EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAS MOVED OFFSHORE INTO 
THE ATLANTIC WATERS...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE. 
STRONG WINDS UP TO 55 MPH AND TORRENTIAL RAINFALL WILL STILL BE 
POSSIBLE IN SAINT LUCIE AND MARTIN COUNTIES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT MONDAY MORNING FOR
EAST CENTRAL FLORIDA.

LAT...LON 2725 8066 2763 8054 2778 8044 2771 8040
      2771 8039 2778 8043 2782 8042 2768 8035
      2769 8035 2762 8034 2754 8030 2744 8027
      2720 8016 2717 8016 2716 8019 2715 8015
      2708 8012
TIME...MOT...LOC 0707Z 312DEG 38KT 2771 8031 2752 8038
          2726 8050

$$


MOSES

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:30 PM EDT	Special Marine Warning	MLB		2 hr
Apr 25, 8:36 PM EDT	Special Weather Statement	MLB	Brevard, Osceola	39 min
Apr 25, 11:57 PM EDT	Areal Flood Advisory	MLB	Lake, Orange	93 min
Apr 26, 12:24 AM EDT	Special Weather Statement	MLB	Lake, Orange, Seminole	51 min
Apr 26, 1:19 AM EDT	Special Weather Statement	MLB	Brevard, Indian River, Osceola	56 min
Apr 26, 1:27 AM EDT	Special Marine Warning	MLB		2 hr
Apr 26, 2:23 AM EDT	Special Weather Statement	MLB	Indian River, Osceola	82 min
Apr 26, 2:29 AM EDT	Areal Flood Advisory	MLB	Brevard, Indian River, Osceola	2 hr
Apr 26, 3:12 AM EDT	Special Marine Warning	MLB		2 hr
Apr 26, 3:40 AM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	50 min
Apr 26, 2:21 PM EDT	Fire Weather Watch	MLB	Lake, Orange, Osceola, Seminole, Volusia	12 hr
Apr 26, 2:21 PM EDT	Fire Weather Watch	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	25 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2010 Every severe thunderstorm warning in 2010

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.