Alert archive / Hawaii / Flash Flood Warnings in 2021
Flash Flood Warning 36, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Mar 29, 2021, 9:53 AM HST for Kauai County, Hawaii. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2021, 9:53 AM HST (19:53 UTC)
- Expired
- Mar 29, 2021, 11:56 AM HST
- In force
- 2 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
- Flood severity
- None
County Kauai County, HI
The nearest sounding before it
Lihue, (PHLI), launched 12:00Z, 7.9 hours before the alert went out and 18 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.
- Mixed-layer CAPE
- 36 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
918
WGHW50 PHFO 291953
FFWHFO
HIC007-292245-
/O.NEW.PHFO.FF.W.0036.210329T1953Z-210329T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Honolulu HI
953 AM HST Mon Mar 29 2021
The National Weather Service in Honolulu has issued a
* Flash Flood Warning for...
The island of Kauai in Kauai County
* Until 1245 PM HST.
* At 953 AM HST, river gages remain high and, with unsettled weather
expected across Kauai through this afternoon, flooding may affect
any part of the island.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Gauges.
IMPACT...Flooding in drainages, streams, rivers, roads,
properties, and other low-lying areas. Public road
closures possible in some areas. Landslides are
possible in steep terrain.
* This warning includes the enter island of Kauai.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
&&
This warning may need to be extended beyond 1245 PM HST if flooding
persists.
LAT...LON 2206 15980 2216 15974 2224 15958 2222 15952
2225 15949 2224 15943 2225 15940 2222 15933
2216 15930 2215 15928 2205 15932 2196 15932
2195 15934 2193 15934 2187 15941 2186 15950
2188 15962 2194 15968 2198 15978
FLASH FLOOD...RADAR INDICATED
$$
LAU1 follow-up statement
493
WGHW70 PHFO 292156
FFSHFO
Flash Flood Statement
National Weather Service Honolulu HI
1156 AM HST Mon Mar 29 2021
HIC007-292206-
/O.CAN.PHFO.FF.W.0036.000000T0000Z-210329T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kauai HI-
1156 AM HST Mon Mar 29 2021
...FLASH FLOOD WARNING IS CANCELLED FOR THE ISLAND OF KAUAI IN KAUAI
COUNTY...
Flooding is no longer expected to pose a threat.
LAT...LON 2206 15980 2216 15974 2224 15958 2222 15952
2225 15949 2224 15943 2225 15940 2222 15933
2216 15930 2215 15928 2205 15932 2196 15932
2195 15934 2193 15934 2187 15941 2186 15950
2188 15962 2194 15968 2198 15978
$$
LAUThe office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 5:15 PM HST | Wind Advisory | HFO | Hawaii | 22 hr |
| Mar 28, 7:06 PM HST | Winter Weather Advisory | HFO | Hawaii | 32 hr |
| Mar 29, 8:54 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Mar 29, 12:32 PM HST | Flash Flood Watch | HFO | Kauai | 20 hr |
Nearby
Flash Flood Warnings in Hawaii, 2021Every flash flood warning in 2021
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.