Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 39, NWS Tampa Bay, FL

March 12, 1993Sumter County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Mar 12, 1993, 11:54 PM EST for Sumter County, Florida. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Mar 12, 1993, 11:54 PM EST (04:54 UTC)
Expired
Mar 13, 1993, 12:55 AM EST
In force
61 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Sumter County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 4.9 hours before the alert went out and 116 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-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 1993-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 645 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 00:00Z on 1993-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
645 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1480 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Mar 12, 9:39 PM EST, 2 hours 15 minutes before
FLZ006-008>021-130335-

SPECIAL WEATHER STATEMENT AND MARINE WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
935 PM EST FRI MARCH 12 1993

... TORNADO WATCH IN EFFECT FOR LEVY COUNTY AND THE ADJACENT COASTAL
    WATERS UNTIL 4 AM EST...

AT 930 PM EST... RADAR INDICATED A LINE OF STRONG THUNDERSTORMS FROM 100
MILES WEST OF BAYPORT... TO 120 MILES OFFSHORE OF VENICE. THE LINE WAS
MOVING EAST AT 65 TO 70 MILES AN HOUR. THESE DANGEROUS THUNDERSTORMS
WILL BE APPROACHING THE COASTAL WATERS OF WEST FLORIDA BY 1030 PM.

DUE TO THE RAPID MOVEMENT OF THESE STORMS... BOATERS SHOULD SEEK SAFE
HARBOR IMMEDIATELY AND PLAN TO STAY IN PORT FOR TONIGHT AND SATURDAY.

rELSEWHERE... A LARGE AREA OF RAIN WAS OVER THE NORTHEAST GULF FROM NEAR
APALACHEE BAY... TO NEAR CEDAR KEY.

THIS ACTIVITY WAS MOVING NORTH AT 40 TO 45 MILES AN HOUR.
Local storm report, Mar 12, 11:50 PM EST, 4 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL
1147 PM EST FRI MAR 12 1993

DATE   TIME       LOCATION/EVENT
3/12   2338 EST   LEVY COUNTY, CHIEFLAND
                  TORANDO, SEVERAL HOUESE BLOWN DOWN RESIDENTS TRAPPED
                  INSIDE AT THIS TIME. REPORTED BY COUNTY EOC.
Local storm report, Mar 12, 11:54 PM EST, 0 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL
1152 PM EST FRI MAR 12 1993

DATE   TIME       LOCATION/EVENT
3/12   2358 EST   SARASOTA COUNTY, SARASOTA
                  WIND GUSTS TO 58 MPH R"EPORTED AT EOC.

3/12   2345 EST   MANATEE COUNTY, BRADENTON
                  WIND DAMAGE, POWER LINES BLOWN DOWN.
                  REPRTED BY COUNTY EM.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 12, 10:50 PM ESTSevere Thunderstorm WarningTBWCitrus, Hernando, Levy115 min
Mar 12, 10:50 PM ESTSevere Thunderstorm WarningTBWHillsborough, Pasco, Pinellas115 min
Mar 12, 10:50 PM ESTSevere Thunderstorm WarningTBWManatee115 min
Mar 12, 11:22 PM ESTSevere Thunderstorm WarningTBWSarasota101 min
Mar 12, 11:38 PM ESTTornado WarningTBWPasco, Pinellas37 min
Mar 12, 11:54 PM ESTSevere Thunderstorm WarningTBWPolk2 hr
Mar 13, 12:08 AM ESTTornado WarningTBWHillsborough52 min
Mar 13, 12:23 AM ESTSevere Thunderstorm WarningTBWCharlotte, DeSoto, Lee2 hr
Mar 13, 12:23 AM ESTSevere Thunderstorm WarningTBWHardee2 hr
Mar 13, 12:43 AM ESTTornado WarningTBWManatee47 min
Mar 13, 1:34 AM ESTSevere Thunderstorm WarningTBWHighlands116 min
Mar 13, 1:37 AM ESTSevere Thunderstorm WarningTBWSarasota2 hr
Mar 13, 1:52 AM ESTSevere Thunderstorm WarningTBWPolk2 hr
Mar 13, 2:31 AM ESTSevere Thunderstorm WarningTBWCharlotte, DeSoto, Lee119 min
Mar 13, 3:30 AM ESTSevere Thunderstorm WarningTBWHighlands60 min
Mar 13, 3:56 AM ESTTornado WarningTBWSarasota34 min

Nearby

Severe Thunderstorm Warnings in Florida, 1993Every severe thunderstorm warning in 1993

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.