Alert archive / Florida / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 29, NWS Tampa Bay, FL

July 22, 2002Hillsborough County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 22, 2002, 2:11 PM EDT for Hillsborough County, Florida. It was in force for 34 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, 2002, 2:11 PM EDT (18:11 UTC)
Expired: Jul 22, 2002, 2:45 PM EDT
In force: 34 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Hillsborough County, FL

The radar

The Tampa radar (KTBW), 23 km from the middle of the area, began a volume at 18:12 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

Tampa Bay, FL (KTBW), launched 12:00Z, 6.2 hours before the alert went out and 23 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: 1118 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

878 
WUUS52 KTBW 221811
SVRTBW
FLC057-221845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
211 PM EDT MON JUL 22 2002

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HILLSBOROUGH COUNTY IN FLORIDA.

* UNTIL 245 PM EDT.

* AT 211 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHEASTERN
  HILLSBOROUGH COUNTY...MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  HILLSBOROUGH RIVER STATE PARK.

SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND
HAIL THE SIZE OF DIMES OR LARGER. MOVE TO A PLACE OF SAFETY.

$$


13

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, 9:45 AM EDT, 4 hours 26 minutes earlier.

Area forecast discussion, Jul 22, 9:45 AM EDT, 4 hours 26 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
945 AM EDT MON JUL 22 2002

CURRENTLY...ANOTHER ACTIVE MORNING OVER THE NE GULF WITH WIDESPREAD
CONVECTION...WHICH IS JUST SAGGING INTO LEVY COUNTY. IL-DEFINED SFC
RIDGE AXIS SEEMS TO HAVE MOVED TEMPORARILY A LITTLE NORTH INTO NCENT
FL...ALLOWING FOR SE LOW LEVEL FLOW ACROSS THE FA THIS MORNING. 12Z
SOUNDING A LITTLE LESS MOIST AND UNSTABLE FROM YESTERDAY WITH PW
JUST UNDER 1.9 INCHES...AND MODIFIED CAPE OF 3000 J/KG. WITH LOW
LEVEL SE FLOW...WINDS VEER FROM SE TO W SFC TO 650 MB...BUT SPEEDS
ARE LIGHT.

--REST OF TODAY--
WITH LARGE AREA OF CONVECTION APPROACHING THE NE FA...MAY NEED TO
BUMP POPS UP TO CATEGORICAL...ESPECIALLY GIVEN TREND OF WIDESPREAD
RAINFALL IN THIS REGION LAST FEW DAYS. VEERING WIND PROFILE THIS
MORNING MAY ALSO PROVIDE FAVORABLE CONDITIONS FOR SPOUT FORMATION
THROUGH THE MORNING...BEFORE FLOW VEERS AROUND TO DEEPER SW.

OTHER THAN POSSIBLY RAISING POPS OVER THE N FA...REST OF FCST LOOKS
ON TRACK.

--MARINE--
SOME COSMETIC CLEAN UP...OTHERWISE FCST LOOKS FINE. MAY ADD MENTION
OF HIGHER WINDS AND SEAS WITH TSTMS OVER THE NORTHERN WATERS.

.TBW...NONE.

MORALES

Nearby

Severe Thunderstorm Warnings in Florida, 2002 Every severe thunderstorm warning in 2002

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.