Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 72, NWS Melbourne, FL

July 22, 20124 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 22, 2012, 4:04 PM EDT for 4 counties in Florida. It was in force for 56 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: Jul 22, 2012, 4:04 PM EDT (20:04 UTC)
Expired: Jul 22, 2012, 5:00 PM EDT
In force: 56 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Orange County, FL, Osceola County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 67 km from the middle of the area, began a volume at 20:06 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
Jul 22, 4:39 PM EDT	TSTM WND GST 55	Sanford Airport, FL	KSFB ASOS AT SANFORD AIRPORT MEASURED A THUNDERSTORM WIND GUST OF 48 KT/55 MPH.

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, 8.1 hours before the alert went out and 50 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: 765 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1288 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -6 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.

163 
WUUS52 KMLB 222004
SVRMLB
FLC095-097-117-127-222100-
/O.NEW.KMLB.SV.W.0072.120722T2004Z-120722T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
404 PM EDT SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ORANGE COUNTY IN FLORIDA
  NORTHERN OSCEOLA COUNTY IN FLORIDA
  SEMINOLE COUNTY IN FLORIDA
  SOUTHEASTERN VOLUSIA COUNTY IN FLORIDA

* UNTIL 500 PM EDT.

* AT 357 PM 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 15 MILES SOUTHEAST OF OAK HILL TO 8 MILES EAST OF CHRISTMAS TO
  7 MILES SOUTHWEST OF HOLOPAW...MOVING NORTHWEST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... 
HARMONY...SAINT CLOUD...UNION PARK...ORLANDO INTERNATIONAL 
AIRPORT...NEW SMYRNA BEACH...WINTER 
SPRINGS...ORLANDO...MIDWAY...WINTER   PARK...SANFORD...  
MAITLAND...DELTONA...PORT ORANGE...SOUTH DAYTONA

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 2879 8074 2881 8078 2885 8079 2885 8081
      2879 8079 2879 8098 2871 8096 2861 8097
      2859 8094 2854 8094 2852 8091 2848 8089
      2804 8088 2809 8145 2834 8139 2899 8136
      2920 8100
TIME...MOT...LOC 2002Z 155DEG 43KT 2877 8071 2858 8092
          2812 8117

$$

SEDLOCK

3 follow-up statements

972 
WWUS52 KMLB 222032
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
432 PM EDT SUN JUL 22 2012

FLC095-097-117-127-222100-
/O.CON.KMLB.SV.W.0072.000000T0000Z-120722T2100Z/
SEMINOLE-ORANGE-OSCEOLA-VOLUSIA-
432 PM EDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHEASTERN VOLUSIA...NORTH CENTRAL OSCEOLA...EASTERN ORANGE AND
SEMINOLE COUNTIES...

AT 430 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM EDGEWATER TO FARMTON TO SANFORD AIRPORT TO WINTER PARK
TO OSCEOLA ASTROS COMPLEX...MOVING NORTHWEST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PINE
CASTLE...CASSELBERRY...EDGEWOOD...MIDWAY...ORLANDO...FERN PARK...
MAITLAND...LAKE ASHBY...LONGWOOD...NEW SMYRNA BEACH...LAKE 
MARY...LAKE MONROE...DELTONA...SOUTH DAYTONA

LAT...LON 2920 8100 2879 8074 2881 8078 2885 8079
      2885 8081 2879 8079 2879 8098 2872 8096
      2861 8097 2859 8094 2854 8094 2852 8091
      2840 8103 2823 8112 2807 8102 2809 8145
      2832 8139 2899 8136
TIME...MOT...LOC 2031Z 155DEG 43KT 2899 8085 2889 8109
          2878 8124 2861 8136 2828 8140

$$

SEDLOCK

474 
WWUS52 KMLB 222051
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
451 PM EDT SUN JUL 22 2012

FLC097-222101-
/O.CAN.KMLB.SV.W.0072.000000T0000Z-120722T2100Z/
OSCEOLA-
451 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL OSCEOLA COUNTY
IS CANCELLED...

LAT...LON 2920 8100 2879 8074 2881 8078 2885 8078
      2885 8079 2885 8081 2879 8079 2879 8102
      2878 8105 2875 8108 2866 8105 2866 8110
      2862 8107 2835 8137 2835 8139 2899 8136
TIME...MOT...LOC 2051Z 155DEG 43KT 2911 8110 2896 8126
          2885 8141 2868 8153 2835 8157

$$

FLC095-117-127-222100-
/O.CON.KMLB.SV.W.0072.000000T0000Z-120722T2100Z/
SEMINOLE-ORANGE-VOLUSIA-
451 PM EDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHEASTERN VOLUSIA...CENTRAL ORANGE AND SEMINOLE COUNTIES...

AT 450 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SPRUCE CREEK TO CASSADAGA TO HIGH BANKS TO 10 MILES 
WEST OF MAITLAND TO 14 MILES SOUTHWEST OF PINE CASTLE...MOVING 
NORTHWEST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BLAKE...BLUE SPRING STATE PARK...FATIO...DE LAND SOUTHWEST AND DELAND
SOUTHWEST

LAT...LON 2920 8100 2879 8074 2881 8078 2885 8078
      2885 8079 2885 8081 2879 8079 2879 8102
      2878 8105 2875 8108 2866 8105 2866 8110
      2862 8107 2835 8137 2835 8139 2899 8136
TIME...MOT...LOC 2051Z 155DEG 43KT 2911 8110 2896 8126
          2885 8141 2868 8153 2835 8157

$$

SEDLOCK

375 
WWUS52 KMLB 222101
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
501 PM EDT SUN JUL 22 2012

FLC095-117-127-222115-
/O.EXP.KMLB.SV.W.0072.000000T0000Z-120722T2100Z/
SEMINOLE-ORANGE-VOLUSIA-
501 PM EDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VOLUSIA...CENTRAL
ORANGE AND SEMINOLE COUNTIES WILL EXPIRE AT 500 PM EDT...

THE SEVERE STORMS THAT PROMPTED THE WARNING HAD WEAKENED...THOUGH 
WERE STILL CAPABLE OF STRONG WINDS OF 45 TO 55 MPH ACROSS SOUTHEAST 
VOLUSIA COUNTY...ORANGE COUNTY AND SEMINOLE COUNTY.

LAT...LON 2920 8100 2879 8074 2881 8078 2885 8078
      2885 8079 2885 8081 2879 8079 2879 8102
      2878 8105 2875 8108 2866 8105 2866 8110
      2862 8107 2835 8137 2835 8139 2899 8136
TIME...MOT...LOC 2059Z 155DEG 43KT 2920 8115 2905 8131
          2894 8146 2877 8158 2844 8162

$$

SEDLOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 2:24 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	51 min
Jul 22, 2:39 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Saint Lucie	52 min
Jul 22, 2:46 PM EDT	Special Marine Warning	MLB		89 min
Jul 22, 2:51 PM EDT	Special Marine Warning	MLB		84 min
Jul 22, 2:57 PM EDT	Special Weather Statement	MLB	Brevard	63 min
Jul 22, 3:06 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	54 min
Jul 22, 3:09 PM EDT	Special Weather Statement	MLB	Okeechobee	51 min
Jul 22, 3:34 PM EDT	Special Weather Statement	MLB	Osceola	41 min
Jul 22, 3:36 PM EDT	Special Weather Statement	MLB	Brevard	54 min
Jul 22, 3:50 PM EDT	Special Marine Warning	MLB		115 min
Jul 22, 3:57 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	5 min
Jul 22, 4:16 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	26 min
Jul 22, 4:36 PM EDT	Special Weather Statement	MLB	Lake	84 min
Jul 22, 5:05 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	34 min
Jul 22, 5:15 PM EDT	Special Weather Statement	MLB	Lake, Volusia	90 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every severe thunderstorm warning in 2012

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.