Alert archive / Florida / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 55, NWS Jacksonville, FL

May 28, 2001Duval County, Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at May 28, 2001, 5:45 PM EDT for Duval County, Nassau County, Florida. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: May 28, 2001, 5:45 PM EDT (21:45 UTC)
Expired: May 28, 2001, 6:30 PM EDT
In force: 45 min
Issued by: NWS Jacksonville, FL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Duval County, FL, Nassau County, FL

What was reported inside it

Time	Report	Where	Remark
May 28, 6:06 PM EDT	Hail 0.75	Yulee, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.8 hours before the alert went out and 13 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1574 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KJAX 282145
SVRJAX
FLC031-089-282230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
545 PM EDT MON MAY 28 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DUVAL COUNTY IN NORTHEAST FLORIDA
  NASSAU COUNTY IN NORTHEAST FLORIDA

* UNTIL 630 PM EDT

* AT 545 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS NEAR
  CALLAHAN...MOVING EAST AT 15 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 630 PM EDT...
  CALLAHAN AND NASSAU VILLAGE-RATLIFF...
  JACKSONVILLE INTERNATIONAL...
  YULEE...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WIND IN EXCESS OF 60 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER.

LAT...LON 3065 8197 3043 8184 3051 8146 3068 8150
          3076 8174

$$

MOBBS

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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 28, 1:50 PM EDT, 3 hours 55 minutes earlier.

Area forecast discussion, May 28, 1:50 PM EDT, 3 hours 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
150 PM EDT MON MAY 28 2001

UPDATED ZONES TO INCREASE AFTERNOON POPS.

SOUTHWEST WINDS FROM THE GULF ARE PROVIDING LOW LEVEL MOISTURE
ACROSS THE AREA THIS AFTERNOON... MAINLY OVER THE FL PORTION OF THE
CWA. ANOTHER CLUSTER OF STORMS ARE DEVELOPING ACROSS SW GA AND THE
PANHANDLE.

WITH GOOD AREA OF CU AND A FEW TSTMS HAVE DEVELOPED ALONG THE GULF
COAST SEA BREEZE FRONT AND DRIFTED EASTWARD.

AT THIS TIME THE AREA OF CU AND TSTMS CONTINUES TO WEAKEN SOME WHAT
AS THEY MOVE INTO THE DRIER AIR. HOWEVER WITH AFTERNOON CAPE VALUES
ABOVE 4000... EXPECT A FEW STRONG STORMS TO PRODUCE SMALL HAIL AND
WIND GUSTS IN THE 40 MPH RANGE.

WITH WEAK HIGH PRESSURE REMAINING OVER THE GULF AND S FL... AND A
WEAK FRONT JUST NORTH OF THE AREA THROUGH THE FORECAST PERIOD. WE
MAY SEE A BRIEF RETURN TO OUR NORMAL AFTERNOON SUMMER-LIKE PATTERN.

ALSO WITH THE LOW LEVEL MOISTURE COMBINING WITH THE WILDFIRE
SMOKE... WE MAY NEED A SMOKE OR FOG ADVISORY TOMORROW MORNING.

MARINE...SEAS IN THE 2 TO 4 FOOT RANGE.

PRELIM
AMG 67/88/65/88 2434
SSI 69/86/69/85 2434
JAX 68/92/70/89 2434
GNV 68/92t/69/89 2434 22

.JAX...
FL...NONE.
GA...NONE.

JOHNSON

In the hours before

Special weather statement, May 28, 12:31 PM EDT, 5 hours 14 minutes before

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-282330-

NORTHEAST FLORIDA/SOUTHEAST GEORGIA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1231 PM EDT MON MAY 28 2001

SCATTERED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS NORTH
CENTRAL FLORIDA THIS MORNING...AND WILL CONTINUE TO DEVELOP ACROSS
NORTHEAST FLORIDA AND SOUTHEAST GEORGIA THIS AFTERNOON AND EVENING
AS SEABREEZES INTERACT WITH AN UPPER LEVEL DISTURBANCE MOVING IN
FROM THE NORTHWEST.

THESE THUNDERSTORMS WILL PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING...HEAVY DOWNPOURS...GUSTY WINDS TO 50 MPH AND SMALL HAIL.
MARINERS ARE URGED TO SEEK SAFE HARBOR IMMEDIATELY IF THREATENING
WEATHER APPROACHES. THE MAJORITY OF THESE STORMS ARE EXPECTED TO
REMAIN BELOW SEVERE LIMITS AND SPOTTER ACTIVATION IS NOT ANTICIPATED
AT THIS TIME.

AFTER SUNSET...LOW VISIBILITIES IN SMOKE FROM WILDFIRES MAY PRODUCE
HAZARDOUS DRIVING CONDITIONS ACROSS NORTHEAST FLORIDA AND SOUTHEAST
GEORGIA...ESPECIALLY NEAR THE INTERSECTIONS OF INTERSTATES 75 AND 10
NEAR LAKE CITY. USE EXTRA CAUTION AND ALLOW PLENTY OF TIME TO REACH
YOUR TRAVEL DESTINATIONS TONIGHT.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
JACKSONVILLE WEBSITE ON THE INTERNET AT WWW.SRH.NOAA.GOV/JAX.

HESS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 6:34 PM EDT	Severe Thunderstorm Warning	JAX	Duval	41 min

Nearby

Severe Thunderstorm Warnings in Florida, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.