Alert archive / Florida / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 27, NWS Melbourne, FL

March 30, 1996Seminole County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 30, 1996, 6:21 PM EST for Seminole County, Florida. It was in force for 54 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Mar 30, 1996, 6:21 PM EST (23:21 UTC)
Expired: Mar 30, 1996, 7:15 PM EST
In force: 54 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Seminole County, FL

The radar

The Melbourne radar (KMLB), 88 km from the middle of the area, began a volume at 23:21 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
Mar 30, 7:06 PM EST	Hail 1.75	Oviedo, FL
Mar 30, 7:22 PM EST	Thunderstorm Wind 58	Chuluota, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 11.4 hours before the alert went out and 77 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: 1188 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS01 KMLB 302321 RRA
SVRMLB
FLC117-310015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
621 PM EST SAT MAR 30 1996
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL FLORIDA
 
   ...SEMINOLE COUNTY
 
AT 618 PM...DOPPLER RADAR IN MELBOURNE SHOWED A SEVERE THUNDERSTORM
PRODUCING A TORNADO BETWEEN ZELLWOOD AND APOPKA MOVING INTO SEMINOLE
COUNTY. THE STORM WILL AFFECT AREAS FROM SANFORD SOUTH TO LAKE MARY
AND ALTAMONTE SPRINGS BETWEEN 630 AND 700 PM. PERSONS IN THE PATH OF
THE STORM SHOULD TAKE COVER IMMEDIATELY.
 
 
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 58 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE OR IN MOBILE HOMES SHOULD MOVE
INSIDE A STRONG BUILDING AND STAY AWAY FROM WINDOWS.

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 Mar 30, 2:47 PM EST, 3 hours 34 minutes earlier.

Area forecast discussion, Mar 30, 2:47 PM EST, 3 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
230 PM EST SAT MAR 30 1996

APPROACHING SHORT WAVE/UVV CENTER WILL CONTINUE TO ENHANCE TRW
COVERAGE AND INTENSITY THROUGH THE EVENING. FOCUS OF STRONGEST STORMS
AT THIS TIME IS ALONG BOUNDARY FROM TTS TO TBW AREA. THIS BOUNDARY
WILL LIFT NORTHWARD THIS EVENING AND WILL FOCUS RAIN/TRW CONCENTRATION
ACROSS NORTHERN THIRD OF STATE...HOWEVER TRW WILL ALSO OCCUR FARTHER
SOUTH NEAR OUTFLOW AND SEA BREEZE BOUNDARIES INTO THE EVENING. FEW
SEVERE STORMS LIKELY. AS SHORTWAVE PROGRESSES NE OF REGION BY SUNDAY
MORNING...DEEP MOISTURE WILL RAPIDLY DECREASE AND WINDS WILL BECOME
MORE WESTERLY...LEAVING BEST CHANCES FOR CONVECTION ACROSS
SOUTHERNMOST ZONES. ALTHOUGH TRW COVERAGE WILL BE MUCH LESS
SUNDAY...CONTINUATION OF COLD TEMPS ALOFT AND APPROACHING JET MAX MAY
ALLOW THE STORMS WHICH DO DEVELOP TO BECOME STRONG. MULTILAYERED
CLOUDS WILL HOLD DAYTIME HIGHS DOWN A BIT SUNDAY. THANKS FORF
COORDINATION TBW/JAX.

SPRATT

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 2:00 PM EST	Severe Thunderstorm Warning	MLB	Brevard	60 min
Mar 30, 2:58 PM EST	Severe Thunderstorm Warning	MLB	Brevard	62 min
Mar 30, 3:56 PM EST	Severe Thunderstorm Warning	MLB	Orange, Osceola	64 min
Mar 30, 4:11 PM EST	Severe Thunderstorm Warning	MLB	Brevard	64 min
Mar 30, 4:51 PM EST	Severe Thunderstorm Warning	MLB	Lake	69 min
Mar 30, 4:57 PM EST	Severe Thunderstorm Warning	MLB	Osceola	63 min
Mar 30, 5:12 PM EST	Severe Thunderstorm Warning	MLB	Brevard, Indian River, Okeechobee	63 min
Mar 30, 5:20 PM EST	Severe Thunderstorm Warning	MLB	Martin, Saint Lucie	55 min
Mar 30, 5:34 PM EST	Tornado Warning	MLB	Lake	26 min
Mar 30, 5:54 PM EST	Tornado Warning	MLB	Lake, Orange	36 min
Mar 30, 6:10 PM EST	Severe Thunderstorm Warning	MLB	Indian River	65 min
Mar 30, 6:25 PM EST	Tornado Warning	MLB	Seminole	50 min
Mar 30, 6:43 PM EST	Tornado Warning	MLB	Orange	32 min

Nearby

Severe Thunderstorm Warnings in Florida, 1996 Every severe thunderstorm warning in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.