Alert archive / Hawaii / Flash Flood Warnings in 2015
Flash Flood Warning 49, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Sep 16, 2015, 1:57 PM HST for Hawaii County, Hawaii. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 16, 2015, 1:57 PM HST (23:57 UTC)
- Expired
- Sep 16, 2015, 4:45 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
- Flood severity
- None
County Hawaii County, HI
The radar
The South Shore radar (PHWA), 27 km from the middle of the area, began a volume at 23:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 16, 2:52 PM HST | FLASH FLOOD | 1 Se Kailua-Kona, HI | HUALALAI ROAD FROM QUEEN KAAHUMANU HWY TO HIENALOLI RD AND KUAKINI HWY AT ONIONI ST HAVE BEEN CLOSED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Hilo, (PITO), launched 12:00Z, 12.0 hours before the alert went out and 90 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
- 116 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 812 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
697
WGHW50 PHFO 162357
FFWHFO
HIC001-170245-
/O.NEW.PHFO.FF.W.0049.150916T2357Z-150917T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
157 PM HST WED SEP 16 2015
THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A
* FLASH FLOOD WARNING FOR...
THE ISLAND OF HAWAII IN HAWAII COUNTY
* UNTIL 445 PM HST
* AT 150 PM HST...RADAR SHOWED HEAVY RAIN OVER THE SLOPES OF THE
NORTH AND SOUTH KONA DISTRICTS WITH RATES OF 1 TO 3 INCHES PER
HOUR. THE RAINFALL IS OCCURRING OVER AREAS SATURATED BY PREVIOUS
RAINFALL. NORMALLY DRY DRAINAGES AND STREAM CHANNELS WILL FLOW
QUICKLY. RUNOFF MAY RESULT IN THE CLOSING OF ROADS IN THE
AREA...ESPECIALLY NEAR WAIAHA...HOLUALOA AND HONALO. AVOID
UNNECESSARY TRAVEL.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...
KAILUA-KONA...CAPTAIN COOK...HONAUNAU...PAHALA...KAWA FLATS...
NAALEHU...KEALAKEKUA...KAINALIU...WAIKOLOA AND PUUANAHULU.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING IN
STREAMS...ROADS AND LOW LYING AREAS. MOVE TO HIGHER GROUND NOW.
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 445 PM HST IF HEAVY RAIN
PERSISTS.
THIS FLASH FLOOD WARNING REPLACES THE PREVIOUSLY ISSUED ADVISORY THAT
WAS IN EFFECT FOR PORTIONS OF THE ISLAND OF HAWAII IN HAWAII COUNTY.
LAT...LON 1897 15572 1904 15588 1910 15592 1936 15589
1959 15597 1973 15606 1995 15587 1985 15548
1927 15530 1913 15551 1908 15556 1904 15556
1891 15568
$$
KODAMA2 follow-up statements
979
WGHW70 PHFO 170107
FFSHFO
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
307 PM HST WED SEP 16 2015
HIC001-170245-
/O.CON.PHFO.FF.W.0049.000000T0000Z-150917T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAWAII HI-
307 PM HST WED SEP 16 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM HST FOR THE
ISLAND OF HAWAII IN HAWAII COUNTY...
AT 252 PM HST...SOCIAL MEDIA REPORTS INDICATED THAT HUALALAI ROAD
FROM QUEEN KAAHUMANU HIGHWAY TO HIENALOLI ROAD...AND KUAKINI HIGHWAY
AT ONIONI STREET HAVE BEEN CLOSED DUE TO FLOODING. RAINFALL HAS
EASED FOR NOW OVER THE KONA SLOPES BUT HEAVY RAIN IS NOW OCCURRING
NEAR WAIKOLOA...WOOD VALLEY AND PAHALA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...KAILUA-
KONA...CAPTAIN COOK...HONAUNAU...PAHALA...KAWA FLATS...
NAALEHU...KEALAKEKUA...KAINALIU...WAIKOLOA AND PUUANAHULU.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING IN
STREAMS...ROADS AND LOW LYING AREAS. MOVE TO HIGHER GROUND NOW.
DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT.
TURN AROUND...DON/T DROWN.
&&
THIS WARNING MAY NEED TO BE EXTENDED BEYOND 445 PM HST IF HEAVY RAIN
PERSISTS.
LAT...LON 1897 15572 1904 15588 1910 15592 1936 15589
1959 15597 1973 15606 1995 15587 1985 15548
1927 15530 1913 15551 1908 15556 1904 15556
1891 15568
$$
KODAMA135
WGHW70 PHFO 170240
FFSHFO
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
440 PM HST WED SEP 16 2015
HIC001-170248-
/O.EXP.PHFO.FF.W.0049.000000T0000Z-150917T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAWAII HI-
440 PM HST WED SEP 16 2015
...THE FLASH FLOOD WARNING FOR THE ISLAND OF HAWAII IN HAWAII COUNTY
WILL EXPIRE AT 445 PM HST...
WEATHER RADAR SHOWED THAT HEAVY RAIN IN KONA HAS ENDED AND THE
RAINFALL IN THE KAU DISTRICT IS DIMINISHING. PORTIONS OF HUALALAI
ROAD AND KUAKINI HIGHWAY REMAIN CLOSED DUE TO FLOOD DEBRIS.
LAT...LON 1897 15572 1904 15588 1910 15592 1936 15589
1959 15597 1973 15606 1995 15587 1985 15548
1927 15530 1913 15551 1908 15556 1904 15556
1891 15568
$$
KODAMAThe office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 2:43 PM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Sep 15, 2:51 PM HST | Areal Flood Advisory | HFO | Hawaii | 3 hr |
| Sep 15, 3:41 PM HST | Flash Flood Warning | HFO | Hawaii | 6 hr |
| Sep 15, 9:15 PM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
| Sep 16, 12:18 PM HST | Areal Flood Advisory | HFO | Hawaii | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2015Every flash flood warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.