Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 18, NWS Tampa Bay, FL

June 1, 2015Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 1, 2015, 5:31 PM EDT for Polk County, Florida. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 1, 2015, 5:31 PM EDT (21:31 UTC)
Expired: Jun 1, 2015, 6:15 PM EDT
In force: 44 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon

County Polk County, FL

The radar

The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 21:34 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.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.5 hours before the alert went out and 131 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: 1368 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 1, 2:55 PM EDT, 2 hours 36 minutes earlier.

Area forecast discussion, Jun 1, 2:55 PM EDT, 2 hours 36 minutes before

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Hazardous weather outlook, Jun 1, 3:42 AM EDT, 13 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
342 AM EDT MON JUN 1 2015

FLZ043-050-052-056-057-061-139-142-148-149-151-155-160-162-165-
239-242-248-249-251-255-260-262-265-GMZ830-836-850-853-856-870-
873-876-012100-
SUMTER-PINELLAS-POLK-HARDEE-HIGHLANDS-DESOTO-COASTAL LEVY-
COASTAL CITRUS-COASTAL HERNANDO-COASTAL PASCO-
COASTAL HILLSBOROUGH-COASTAL MANATEE-COASTAL SARASOTA-
COASTAL CHARLOTTE-COASTAL LEE-INLAND LEVY-INLAND CITRUS-
INLAND HERNANDO-INLAND PASCO-INLAND HILLSBOROUGH-INLAND MANATEE-
INLAND SARASOTA-INLAND CHARLOTTE-INLAND LEE-TAMPA BAY WATERS-
CHARLOTTE HARBOR AND PINE ISLAND SOUND-
COASTAL WATERS FROM TARPON SPRINGS TO SUWANNEE RIVER FL OUT 20 NM-
COASTAL WATERS FROM ENGLEWOOD TO TARPON SPRINGS FL OUT 20 NM-
COASTAL WATERS FROM BONITA BEACH TO ENGLEWOOD FL OUT 20 NM-
WATERS FROM TARPON SPRINGS TO SUWANNEE RIVER FL OUT 20 TO 60 NM-
WATERS FROM ENGLEWOOD TO TARPON SPRINGS FL OUT 20 TO 60 NM-
WATERS FROM BONITA BEACH TO ENGLEWOOD FL OUT 20 TO 60 NM-
342 AM EDT MON JUN 1 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
EVENING...AND PEAK IN INTENSITY AND COVERAGE EARLY THIS EVENING
ALONG THE I-75 CORRIDOR. THUNDERSTORMS THAT DEVELOP WILL BE
CAPABLE OF PRODUCING GUSTY WINDS...LOCALLY HEAVY RAINS... AND
FREQUENT DEADLY LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

...THUNDERSTORM IMPACT...
NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE REGION
ON TUESDAY. ALTHOUGH NO SIGNIFICANT SEVERE WEATHER IS
EXPECTED...THERE IS A THREAT FOR MORE REGIONAL HEAVY
RAINFALL...ALONG WITH FREQUENT LIGHTNING STRIKES.

THUNDERSTORMS BECOME MORE SCATTERED IN NATURE AGAIN DURING THE
MIDDLE AND LATER PORTION OF THE WEEK...MAINLY DURING THE AFTERNOON
AND EVENING HOURS...AND MAINLY ALONG AND EAST OF THE I-75
CORRIDOR.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD MONITOR THE WEATHER FOR DEVELOPING THUNDERSTORMS
LATER TODAY AND SELF ACTIVATE IF NEEDED.

MROCZKA

In the hours before

Special weather statement, Jun 1, 5:20 PM EDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA / RUSKIN FL
520 PM EDT MON JUN 1 2015

FLZ052-012145-
POLK-
520 PM EDT MON JUN 1 2015

...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL POLK COUNTY...

AT 519 PM EDT...A STRONG THUNDERSTORM WAS NEAR COMBEE SETTLEMENT...OR
NEAR LAKELAND. THE STORM WAS NEARLY STATIONARY.

WINDS IN EXCESS OF 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
LAKELAND...BARTOW...AUBURNDALE...MEDULLA...JAN PHYL VILLAGE...FUSSELS
CORNER...COMBEE SETTLEMENT...MULBERRY...BARTOW MUNICIPAL AIRPORT...
GIBSONIA...LAKELAND HIGHLANDS...CRYSTAL LAKE...HIGHLAND CITY AND
WINSTON.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 2789 8198 2814 8201 2816 8180 2789 8176
TIME...MOT...LOC 2119Z 259DEG 2KT 2801 8190

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 5:20 PM EDT	Special Weather Statement	TBW	Polk	25 min
Jun 1, 5:40 PM EDT	Special Weather Statement	TBW	Sumter	35 min
Jun 1, 6:27 PM EDT	Special Weather Statement	TBW	Highlands	48 min
Jun 1, 7:04 PM EDT	Special Weather Statement	TBW	Polk	26 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015 Every severe thunderstorm warning in 2015

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; radar from the NEXRAD Level II archive.