Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 104, NWS Melbourne, FL

July 22, 2008Indian River County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 22, 2008, 12:33 PM EDT for Indian River County, Florida. It was in force for 42 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: Jul 22, 2008, 12:33 PM EDT (16:33 UTC)
Expired: Jul 22, 2008, 1:15 PM EDT
In force: 42 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Indian River County, FL

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.6 hours before the alert went out and 93 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: 1875 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 3 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.

000 
WUUS52 KMLB 221633
SVRMLB
FLC061-221715-
/O.NEW.KMLB.SV.W.0104.080722T1633Z-080722T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1233 PM EDT TUE JUL 22 2008

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL INDIAN RIVER COUNTY IN FLORIDA.

* UNTIL 115 PM EDT

* AT 1232 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM INDIAN RIVER SHORES TO SOUTH
  BEACH...OR ALONG A LINE EXTENDING FROM INDIAN RIVER SHORES TO VERO
  BEACH...AND MOVING NORTHEAST AT 8 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JAYCEE PARK...JAYCEE BEACH AND FLORALTON BEACH

QUARTER INCH HAIL HAS ALREADY BEEN REPORTED WITH THIS CELL.

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 2759 8035 2761 8036 2759 8036 2758 8037
      2770 8040 2771 8039 2772 8036 2769 8036
      2766 8034 2763 8035 2759 8033
TIME...MOT...LOC 1633Z 224DEG 7KT 2769 8034 2764 8034

$$

2 follow-up statements

000 
WWUS52 KMLB 221653
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1253 PM EDT TUE JUL 22 2008

FLC061-221715-
/O.CON.KMLB.SV.W.0104.000000T0000Z-080722T1715Z/
INDIAN RIVER FL-
1253 PM EDT TUE JUL 22 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR EAST CENTRAL INDIAN RIVER COUNTY...

AT 1253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM JAYCEE PARK TO SOUTH BEACH 
...OR ALONG A LINE EXTENDING FROM INDIAN RIVER SHORES TO VERO BEACH 
SOUTH. THE STORMS WERE MOVING SLOWLY NORTHEAST AS THEY EXPANDED IN 
COVERAGE. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
FLORALTON BEACH.

LAT...LON 2759 8035 2761 8036 2759 8036 2758 8037
      2770 8040 2771 8039 2772 8036 2769 8036
      2766 8034 2763 8035 2759 8033
TIME...MOT...LOC 1653Z 224DEG 7KT 2768 8033 2761 8037

$$

000 
WWUS52 KMLB 221715
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
115 PM EDT TUE JUL 22 2008

FLC061-221722-
/O.EXP.KMLB.SV.W.0104.000000T0000Z-080722T1715Z/
INDIAN RIVER FL-
115 PM EDT TUE JUL 22 2008

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL INDIAN RIVER 
COUNTY EXPIRED AT 115 PM EDT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORMS 
THAT PROMPTED THE WARNING HAD WEAKENED AND WERE NO LONGER CAPABLE
OF PRODUCING DAMAGING WINDS OR LARGE HAIL. THUS THE WARNING HAS BEEN 
ALLOWED TO EXPIRE.

LAT...LON 2759 8035 2761 8036 2759 8036 2758 8037
      2770 8040 2771 8039 2772 8036 2769 8036
      2766 8034 2763 8035 2759 8033
TIME...MOT...LOC 1712Z 224DEG 7KT 2771 8030 2764 8034

$$


CRISTALDI

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 22, 9:45 AM EDT, 2 hours 48 minutes earlier.

Area forecast discussion, Jul 22, 9:45 AM EDT, 2 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
945 AM EDT TUE JUL 22 2008

.DISCUSSION...

CURRENT...SFC OBS SHOW A BIT OF AN UNUSUAL ORIENTATION TO THE SFC/
LOW LEVEL RIDGE...WHICH NOW APPEARS TO BE ORIENTED FROM AROUND THE
TAMPA BAY AREA SEWD TO NR LK OKEE AND THEN NR SUA/PBI. WITH THE
RIDGE AXIS PRETTY MUCH SOUTH OF THE AREA...SFC WINDS ARE GENERALLY
LIGHT SSW-SW ACROSS THE ENTIRE CWA. WINDS FROM ABOUT 1-2KM OFF THE
DECK UP INTO THE MID LEVELS REMAIN NW/WNW...OWING TO THE WEAK MID
LVL TROUGH ALONG/OFFSHORE THE EAST COAST OF FL. H50 TEMPS HAVE
COOLED A GOOD 1-2C OVER THE AREA OVER MON...WHICH HAS STEEPENED
LOW TO MID LVL LAPSE RATES...AND REDUCED THE VOTD TO THE L-M50S.
PWATS ACROSS THE AREA ARE AVGING 1.8 GIVE OR TAKE. 10Z XMR RAOB
SHOWED 2.2 OWING TO SATURATED CONDS FROM ABOUT 860-560MB...WHICH
IM NOT BUYING INTO...UNLESS THE 15Z RAOB CONFIRMS THIS (DOUBTFUL
CONSIDERING NEITHER THE GOES OR CIRA TPW PRODUCTS SHOW SUCH HIGH
VALUES).

TODAY...OVERALL EXPECT SCT STORM COVERAGE AGAIN TODAY...INITIALLY
JUST SOME ISOLD ACTIVITY ALONG THE ECSB AND NR INLAND LAKES...BUT
COVERAGE SHOULD INCREASE AS ADDITIONAL MESO BDRY INTERACTIONS OCCUR
AS THE SEA BREEZE PUSHES INTO THE INTR. EXPECT A SLGTLY HIGHER SVR
THREAT TODAY THAN MONDAY (WHICH HAD A FEW STRONG-SVR STORMS AS WELL)
AND WILL UPGRADE THREATS SOME IN HWO/G-HWO PRODUCT SUITE. PLAN TO
INCREASE POPS BY 10% OVER THE INTR.

&&

.AVIATION...VFR THROUGH AROUND 18Z...THEN SLOW INCREASE IN CVRG OF
TSRA PRODUCING CIG/VSBY REDUCTIONS THROUGH 00Z. BETTER CHC FOR TS
AT INTERIOR TAF SITES...VCTS AT EAST COAST LOCATIONS UNLESS CONDS
WARRANT AN AMD.

&&

.MARINE...LGT S-SW FLOW AOB 10KT...BCMG ONSHORE NR THE COAST DUE TO
ECSB CIRC. SEAS 1-2FT NR SHORE AND 2-3FT OFFSHORE.

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.
&&

CRISTALDI/PENDERGRAST

Hazardous weather outlook, Jul 22, 10:00 AM EDT, 2 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
1000 AM EDT TUE JUL 22 2008

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-222100-
COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE
OUT 20 NM-
COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN
INLET OUT 20 NM-
COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM-
WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO
60 NM OFFSHORE-
WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO
60 NM OFFSHORE-
WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE-
INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA-
SOUTHERN LAKE-NORTHERN BREVARD-
1000 AM EDT TUE JUL 22 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
THUNDERSTORM DEVELOPMENT WILL BEGIN BY EARLY THIS AFTERNOON
ALONG EAST COAST SEA BREEZE AS IT DRIFTS INLAND. THE GREATEST
CHANCE FOR STORMS WILL BE OVER THE INTERIOR SECTIONS LATE THIS
AFTERNOON AS COLLISIONS OCCUR WITH THE EAST AND WEST COAST SEA
BREEZE BOUNDARIES.

LATEST UPPER AIR SOUNDING DATA INDICATES MID LEVEL TEMPERATURES
HAVE COOLED BY A COUPLED OF DEGREES...WHICH WILL ENHANCE THE THREAT
FOR DAMAGING WIND GUSTS AND COIN SIZED HAIL WITH THE MORE INTENSE
STORMS THAT DEVELOP FROM MID AND LATE AFTERNOON INTO EARLY EVENING.
STORMS WILL ALSO BE CAPABLE OF PRODUCING DANGEROUS CLOUD TO GROUND
LIGHTNING STRIKES AND HEAVY DOWNPOURS DUE TO SLOW STORM MOVEMENT.
MOVE INDOORS AT THE FIRST SIGN OF A THUNDERSTORM.

...RIP CURRENT IMPACT...
PERSISTENT LONG PERIOD OCEAN SWELLS WILL PRODUCE A MODERATE RISK
FOR RIP CURRENTS AGAIN TODAY. REMEMBER TO SWIM WITHIN SIGHT OF A
LIFEGUARD AND NEVER SWIM ALONE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...
SUFFICIENT MOISTURE AND INSTABILITY WILL EXIST FOR SCATTERED
AFTERNOON SHOWERS AND STORMS EACH DAY INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER...AND REPORT ANY
STORMS WITH STRONG WINDS OR HAIL TO THE NATIONAL WEATHER SERVICE
IN MELBOURNE.

GLITTO/CRISTALDI

In the hours before

Special weather statement, Jul 22, 12:26 PM EDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1226 PM EDT TUE JUL 22 2008

FLZ054-221715-
INDIAN RIVER-
1226 PM EDT TUE JUL 22 2008

...STRONG THUNDERSTORMS AFFECTING SOUTHEASTERN INDIAN RIVER COUNTY...

AT 1226 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG STORM OVER INDIAN RIVER SHORES TO VERO EBACH...MOVING
NORTHEAST AT 10 MPH.

LOCATIONS IN THE PATH OF THIS STRONG STORM INCLUDE VERO BEACH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO
BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK
SHELTER INDOORS UNTIL THE STORM PASSES.

A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE
POSSIBLE IN LOCALIZED AREAS.

JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 9:01 PM EDT	Areal Flood Advisory	MLB	Volusia	119 min
Jul 22, 12:29 PM EDT	Special Marine Warning	MLB		61 min
Jul 22, 1:29 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	28 min
Jul 22, 2:19 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	56 min
Jul 22, 3:41 PM EDT	Areal Flood Advisory	MLB	Brevard	94 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.