Alert archive / Florida / Flash Flood Warnings in 2016

Flash Flood Warning 2, NWS Tampa Bay, FL

September 2, 2016Pasco County, Florida

NWS Tampa Bay, FL issued this flash flood warning at Sep 2, 2016, 5:30 PM EDT for Pasco County, Florida. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 2, 2016, 5:30 PM EDT (21:30 UTC)
Expired
Sep 2, 2016, 7:00 PM EDT
In force
90 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon
Flood severity
None

County Pasco County, FL

The radar

The Tampa radar (KTBW), 69 km from the middle of the area, began a volume at 21:29 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, 9.5 hours before the alert went out and 69 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 12:00Z on 2016-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 599 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2016-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.193958Sfc1 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
599 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
739 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.1

Open this sounding in Storm Lab

The text

As transmitted.

748 
WGUS52 KTBW 022130
FFWTBW
FLC101-022300-
/O.NEW.KTBW.FF.W.0002.160902T2130Z-160902T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA / RUSKIN FL
530 PM EDT FRI SEP 2 2016

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN PASCO COUNTY IN WEST CENTRAL FLORIDA...

* UNTIL 700 PM EDT

* AT 528 PM EDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED HEAVY RAIN
  ACROSS THE WARNED AREA WITH STALLED CARS AND WATER RESCUES
  OCCURRING ALONG US-19. UP TO THREE INCHES OF RAIN HAVE ALREADY
  FALLEN. FLASH FLOODING IS ALREADY OCCURRING ALONG US 19 NEAR NEW
  PORT RICHEY.

ADDITIONAL RAINFALL AMOUNTS OF AN INCH WILL BE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 2821 8276 2836 8272 2837 8264 2828 8260
      2820 8266

$$
1 follow-up statement
569 
WGUS72 KTBW 022157
FFSTBW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA / RUSKIN FL
557 PM EDT FRI SEP 2 2016

FLC101-022300-
/O.CON.KTBW.FF.W.0002.000000T0000Z-160902T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PASCO FL-
557 PM EDT FRI SEP 2 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
WESTERN PASCO COUNTY...

AT 550 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
SHOW HEAVY RAINFALL MOVING ACROSS THE WARNING AREA. EMERGENCY MANAGEMENT
HAS REPORTED FLASH FLOODING ALONG US-19 IN WESTERN PASCO COUNTY...WITH
STALLED VEHICLES AND WATER RESCUES FROM VEHICLES UNDERWAY.

RADAR ESTIMATES OF 3 TO 4 INCHES OF RAIN HAVE ALREADY FALLEN ACROSS THE
WARNED AREA IN THE PAST 2 HOURS. HEAVY RAINFALL WITH AN ADDITIONAL 1 TO 3
INCHES OF ACCUMULATION ARE POSSIBLE THROUGH 8 PM EDT. THE ADDITIONAL 
RAINFALL OVER ALREADY SATURATED SOIL WILL FURTHER AGGRAVATE THE ONGOING
FLOODING SITUATION.

MOTORISTS ARE URGED NOT TO DRIVE ACROSS FLOODED ROADWAYS...AND RISK
BECOMING STALLED OR SWEPT AWAY. IT IS OFTEN DIFFICULT TO DETERMINE
THE DEPTH OF FLOODWATERS...AND MOST FLOOD DEATHS OCCUR IN VEHICLES.
REMEMBER...TURN AROUND DON'T DROWN!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 2821 8276 2836 8272 2837 8264 2828 8260
      2820 8266

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 4:24 AM EDTAreal Flood WarningTBWPasco3 hr
Sep 2, 1:29 PM EDTSpecial Weather StatementTBWLee61 min
Sep 2, 5:18 PM EDTAreal Flood AdvisoryTBWPasco87 min
Sep 2, 6:56 PM EDTAreal Flood WarningTBWPasco109 min

Nearby

Flash Flood Warnings in Florida, 2016Every flash flood warning in 2016

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.