Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 16, NWS Tampa Bay, FL

July 22, 2018Citrus County, Levy County, Sumter County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 22, 2018, 7:15 PM EDT for Citrus County, Levy County, Sumter County, Florida. It was in force for 30 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: Jul 22, 2018, 7:15 PM EDT (23:15 UTC)
Expired: Jul 22, 2018, 7:45 PM EDT
In force: 30 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Citrus County, FL, Levy County, FL, Sumter County, FL

The radar

The Tampa radar (KTBW), 138 km from the middle of the area, began a volume at 23:17 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 22, 11:15 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 11.3 hours before the alert went out and 188 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: 2402 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 848 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.1

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 Jul 22, 2:55 PM EDT, 4 hours 20 minutes earlier.

Area forecast discussion, Jul 22, 2:55 PM EDT, 4 hours 20 minutes before

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Hazardous weather outlook, Jul 22, 4:58 AM EDT, 14 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Tampa Bay Ruskin FL
458 AM EDT Sun Jul 22 2018

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-
873-876-221300-
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-
458 AM EDT Sun Jul 22 2018

This Hazardous Weather Outlook is for West Central And Southwest
Florida.

.DAY ONE...Today and Tonight.

...THUNDERSTORM IMPACT...
A strong upper storm system will move south across the northern
Gulf of Mexico later today. This is expected to generate a complex
of southward moving thunderstorms. A few of the storms may become
strong to severe with the main concern being locally damaging
wind gusts. Small hail, frequent lightning, and torrential rain
leading to possible flooding will also be a concern.

...RIP CURRENT IMPACT...
High surf will produce rip currents along area beaches.

...MARINE IMPACTS...
Breezy west to southwest winds around 20 knots will generate
increasing waves and make for dangerous boating conditions today
into tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

...THUNDERSTORM IMPACT...
An active weather pattern will continue into next week with repeat
rounds of showers and thunderstorms each day. A few storms may
become marginally severe Monday afternoon and evening over inland
areas with small hail and gusty winds. Otherwise, more typical
summer thunderstorms are expected with a daily threat of heavy
rain, gusty winds, and lightning with any storm.

...RIP CURRENT IMPACT...
Rip currents will remain likely along area beaches in response to
breezy onshore winds and increased surf.

...MARINE IMPACTS...
Periods of cautionary to near advisory level winds will remain
possible through at least Monday evening as a tight pressure
gradient remains over the waters. This will continue to support
winds 15 to 20 knots and increased seas.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

Austin

In the hours before

Special weather statement, Jul 22, 3:41 PM EDT, 3 hours 34 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
341 PM EDT SUN JUL 22 2018

FLZ239-222030-
Inland Levy-
341 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL LEVY COUNTY...

At 340 PM EDT, a strong thunderstorm was located near Williston
Highlands, or 9 miles south of Bronson, moving east at 25 mph.

Wind gusts up to 50 mph and dime size hail are possible with this
storm.

Locations impacted include...
Williston, Williston Highlands, Williston Municipal Airport, East
Bronson and Lebanon.

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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northern Florida.

LAT...LON 2922 8240 2922 8253 2917 8254 2917 8269
      2927 8276 2941 8269 2949 8246 2948 8241
TIME...MOT...LOC 1940Z 271DEG 22KT 2932 8261

TBW

Special weather statement, Jul 22, 4:43 PM EDT, 2 hours 32 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
443 PM EDT SUN JUL 22 2018

FLZ239-222130-
Inland Levy-
443 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN LEVY COUNTY...

At 443 PM EDT, a strong thunderstorm was located near Andrews, or
near Chiefland, moving southeast at 25 mph.

Wind gusts up to 50 mph and dime size hail are possible with this
storm.

Locations impacted include...
Williston, Chiefland, Bronson, Williston Highlands, East Bronson,
Andrews, Williston Municipal Airport, Manattee Road and Manatee
Springs State Park.

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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northern Florida.

LAT...LON 2958 8285 2958 8278 2956 8275 2957 8266
      2954 8265 2954 8256 2948 8255 2948 8241
      2922 8240 2922 8253 2918 8254 2950 8299
      2952 8298 2952 8297 2954 8298 2956 8295
      2958 8294 2959 8286
TIME...MOT...LOC 2043Z 320DEG 23KT 2954 8283

TBW

Special weather statement, Jul 22, 5:15 PM EDT, 2 hours before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
515 PM EDT SUN JUL 22 2018

FLZ139-239-222145-
Coastal Levy-Inland Levy-
515 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN LEVY COUNTY...

At 514 PM EDT, a strong thunderstorm was located 16 miles south of
Chiefland, moving east at 30 mph.

Wind gusts up to 50 mph are possible with this storm.

Locations impacted include...
Williston Highlands, Otter Creek and Lebanon.

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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 2936 8290 2928 8242 2922 8244 2921 8254
      2904 8254 2904 8256 2918 8297
TIME...MOT...LOC 2114Z 285DEG 25KT 2924 8281

TBW

Special weather statement, Jul 22, 6:17 PM EDT, 58 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
617 PM EDT SUN JUL 22 2018

FLZ043-142-239-242-222300-
Coastal Citrus-Inland Citrus-Sumter-Inland Levy-
617 PM EDT SUN JUL 22 2018

...A STRONG THUNDERSTORM WILL AFFECT CITRUS...NORTHERN SUMTER AND
SOUTHEASTERN LEVY COUNTIES...

At 616 PM EDT, a strong thunderstorm was located 7 miles northwest of
Black Diamond, or 8 miles northwest of Beverly Hills, moving
southeast at 35 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Inverness, Wildwood, Bushnell, Homosassa Springs, Beverly Hills,
Inverness Airport, Crystal River Airport, Black Diamond, Inverness
Highlands South, Inverness Highlands North, Homosassa, Hernando,
Sugarmill Woods, Lake Panasoffkee, Inglis, Coleman, Arbor Lakes,
Lecanto, Citronelle and Leisure Acres.

LAT...LON 2893 8278 2902 8273 2903 8269 2902 8264
      2911 8267 2914 8266 2910 8253 2904 8253
      2905 8246 2900 8236 2896 8231 2896 8215
      2889 8195 2885 8195 2857 8212 2864 8226
      2866 8227 2867 8227 2867 8232 2888 8279
TIME...MOT...LOC 2216Z 293DEG 37KT 2898 8258

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 4:21 AM EDT	Small Craft Advisory	TBW		18 hr
Jul 22, 3:41 PM EDT	Special Weather Statement	TBW	Levy	49 min
Jul 22, 4:43 PM EDT	Special Weather Statement	TBW	Levy	47 min
Jul 22, 5:15 PM EDT	Special Weather Statement	TBW	Levy	30 min
Jul 22, 6:17 PM EDT	Special Weather Statement	TBW	Citrus, Sumter	43 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning in 2018

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.