Alert archive / Vermont / Flash Flood Warnings in 1998

Flash Flood Warning 99, NWS Burlington, VT

June 27, 1998Washington County, Vermont

NWS Burlington, VT issued this flash flood warning at Jun 27, 1998, 5:53 AM EDT for Washington County, Vermont. It was in force for 4 hr. 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 27, 1998, 5:53 AM EDT (09:53 UTC)
Expired: Jun 27, 1998, 10:00 AM EDT
In force: 4 hr
Issued by: NWS Burlington, VT
Area: Whole counties

County Washington County, VT

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 9.9 hours before the alert went out and 193 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: 1 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 456 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 87 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 
TTAA00 KBTV 270954
FFWBTV
VTC001-017-023-027-271355-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
553 AM EDT SAT JUN 27 1998

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN ADDISON COUNTY IN WEST CENTRAL VERMONT
  SOUTHERN WASHINGTON COUNTY IN NORTH CENTRAL VERMONT
  EXTREME WESTERN ORANGE COUNTY IN EAST CENTRAL VERMONT
  EXTREME NORTHWESTERN WINDSOR COUNTY IN SOUTHEASTERN VERMONT
  
* UNTIL 1000 AM EDT.

* AT 545 AM...RAIN CONTINUES TO FALL OVER THE WARNING AREA.  MAJOR
  FLOODING CONTINUES WITH PEOPLE STRANDED IN TREES AND AT LEAST ONE
  VEHICLE IN THE MAD RIVER NEAR WARREN.  RAIN WILL CONTINUE THROUGH
  THE MORNING WITH AN ADDITIONAL ONE TO TWO INCHES POSSIBLE THROUGH
  NOON.

DO NOT DRIVE OVER WATER COVERED ROADWAYS. THE WATER MAY HAVE
ERODED THE ROADBED MAKING IT UNSAFE TO CROSS. IF YOUR VEHICLE
STALLS...ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. RAPIDLY
RISING WATER MAY ENGULF THE VEHICLE AND SWEEP IT AWAY.

MCGILL

&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this flash flood warning went out at Jun 27, 2:10 AM EDT, 3 hours 43 minutes earlier.

Area forecast discussion, Jun 27, 2:10 AM EDT, 3 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
210 AM EDT SAT JUN 27 1998

TWO AREAS OF MOD-HVY RA AND TSRA. AREAL MVMT IS SLOW AND 88D EST .75
TO 1.00 PER ONE HOUR FEW PLACES. 3 HR PCPN NR 1.50. WUD LEAVE FFA
THRU MORNING. CNTRL VT AND NE NY ARE MAIN CONCERN ATTM. LWR DWPTS
STILL WL N NEAR QUEBEC CITY.

NTRANS SFC ANAL SHOWS STG SFC MSTR CONVC IN NE NY ASSOC WITH WK SFC
LO. SAT PIX DOES SHOW ENHANCE TOPS MOVG E BUT MDLS (INCL RUC2) GIVE
1/2 TO 1 IN RA IN NRN VT THRU 15Z. VOT MAX DPCTD TO MOV SE ACRS CWA
THRU 18Z. MDLS SIMILAR THRU 18Z BUT AFTERWARDS ETA CONSISTENT FM
OTHER RUNS SHOW A WK SFC TROF LINGERS JUST N. ALSO ETA VERY SLOW IN
BRINGING LESS HUMID AIR INTO NRN NY/W VT. IN FACT PWS NOW NR 1.75
AND STILL AT 1 IN BY 12Z SUN. CAPES LESS THAN 500/LIS -2 TDA. STILL
PSBL FOR TSRA.

TNGT SFC RDG TRIES TO BUILD TO FA. HARD TO IGNORE ETA LLVL AND MID
MSTR. BST WORDING MAY BE VRBL CLDY OR P/C. ETA GIVES LGT PCPN. DWPTS
NVR GET BLO THE LOW 60S IN ST. LAW VLY. CHC POP MAY BE NEEDED BUT
BOTH FWC/FAN ARE ZERO

SUN MDL DIFF CONT. H5 HGTS RISE AS TROF PULLS AWAY. ETA HAS CAPES
OVR 1000 J/KG IN NRN NY WHILE NGM IS STABLE. SFC HI MVS EAST ON BOTH
ETA/NGM AS WAA STARTS IN NW NY. CHC POPS AGN MAY BE NEEDED THERE THO
AIRMASS IS FCST TO BE DRIER THAN ITS BEEN FOR AWHILE. MSTR MAY ONLY
BE SUFF FOR ISOLD ACTVTY.

MDLS FCST TEMPS CONT TO DIFFER. ETA 2M TMPS RNG FM 70 TO 80 TDA AND
TMRW FM E TO W. PLEASE RMV EDITORIAL NOTES IN FCST. KMSS HI YDA WAS
79 SO COOLER DOES NOT CUT IT.

TARDY

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 27, 2:09 AM EDT	Flash Flood Warning	BTV	Addison, Orange, Washington	4 hr
Jun 27, 3:24 AM EDT	Flash Flood Warning	BTV	Windsor	3 hr
Jun 27, 5:12 AM EDT	Flash Flood Warning	BTV	Orange	4 hr
Jun 27, 5:53 AM EDT	Flash Flood Warning	BTV	Addison, Orange, Windsor	4 hr
Jun 27, 6:10 AM EDT	Flash Flood Warning	BTV	Chittenden, Lamoille	3 hr
Jun 27, 9:11 AM EDT	Flash Flood Warning	BTV	Orange	6 hr
Jun 27, 9:51 AM EDT	Flash Flood Warning	BTV	Addison, Washington	5 hr
Jun 27, 9:51 AM EDT	Flash Flood Warning	BTV	Windsor	5 hr
Jun 27, 3:20 PM EDT	Flash Flood Warning	BTV	Windsor	5 hr

Nearby

Flash Flood Warnings in Vermont, 1998 Every flash flood warning in 1998

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.