Alert archive / Hawaii / Flash Flood Warnings in 2013
Flash Flood Warning 26, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Jan 27, 2013, 7:03 PM HST for Honolulu County, Hawaii. It was in force for 3 hr. 5 reports 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
- Jan 27, 2013, 7:03 PM HST (05:03 UTC)
- Expired
- Jan 27, 2013, 10:00 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
- Flood severity
- None
County Honolulu County, HI
The radar
The Molokai radar (PHMO), 97 km from the middle of the area, began a volume at 05:05 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 |
|---|---|---|---|
| Jan 27, 8:00 PM HST | FLASH FLOOD | Hauula, HI | WATER EVACUATION - KAM HWY |
| Jan 27, 8:00 PM HST | FLASH FLOOD | Mililani Town, HI | WATER EVACUATION - WAIKALANI PLACE |
| Jan 27, 8:00 PM HST | FLASH FLOOD | Wahiawa, HI | 2 WATER EVACUATIONS IN WAHIAWA - LEILEHUA ST...WALEA ST |
| Jan 27, 9:00 PM HST | FLASH FLOOD | Hauula, HI | WATER EVACUATION - POKIWAI PL |
| Jan 27, 9:00 PM HST | FLASH FLOOD | Kaaawa, HI | STREAM BLOCKED |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this flash flood warning; the first came 57 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Lihue, (PHLI), launched 00:00Z, 5.1 hours before the alert went out and 147 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
- 197 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 507 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
910 WGHW50 PHFO 280503 FFWHFO HIC003-280800- /O.NEW.PHFO.FF.W.0026.130128T0503Z-130128T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 703 PM HST SUN JAN 27 2013 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU IN HONOLULU COUNTY * UNTIL 1000 PM HST * AT 656 PM HST...RADAR SHOWED HEAVY RAIN WITH RATES OF 2 TO 3 INCHES AN HOUR ACROSS CENTRAL AND WINDWARD OAHU. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAHIAWA...MILILANI...SCHOFIELD BARRACKS...HAUULA AND LAIE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS FLASH 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 FLASH FLOOD WARNING REPLACES THE FLOOD ADVISORY THAT WAS IN EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY. THIS WARNING MAY NEED TO BE EXTENDED BEYOND 1000 PM HST IF FLASH FLOODING PERSISTS. LAT...LON 2153 15811 2175 15796 2152 15781 2135 15809 $$ REYNES/WROE
3 follow-up statements
140 WGHW70 PHFO 280537 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 737 PM HST SUN JAN 27 2013 HIC003-280800- /O.CON.PHFO.FF.W.0026.000000T0000Z-130128T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HONOLULU HI- 737 PM HST SUN JAN 27 2013 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY UNTIL 1000 PM HST... RADAR AND RAIN GAGE DATA ARE INDICATING TORRENTIAL DOWNPOURS WITH RATES OF 3 INCHES PER HOUR OCCURRING IN THE MILILANI AND WAHIAWA AREA. RAINFALL THIS INTENSE CAN CREATE LIFE THREATENING SITUATIONS. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PUNALUU... LAIE...KAHUKU AND HAUULA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS FLASH FLOODING IS IMMINENT OR OCCURRING IN STREAMS...ROADS AND LOW LYING AREAS. MOVE TO HIGHER GROUND NOW. DO NOT CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR ON FOOT. TURN AROUND...DON/T DROWN. && THIS WARNING MAY NEED TO BE EXTENDED BEYOND 1000 PM HST IF FLASH FLOODING PERSISTS. LAT...LON 2153 15811 2175 15796 2152 15781 2135 15809 $$ REYNES/WROE
398 WGHW70 PHFO 280639 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 839 PM HST SUN JAN 27 2013 HIC003-280800- /O.CON.PHFO.FF.W.0026.000000T0000Z-130128T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HONOLULU HI- 839 PM HST SUN JAN 27 2013 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN HONOLULU COUNTY UNTIL 1000 PM HST... ALTHOUGH HEAVY SHOWERS ARE DIMINISHING ACROSS CENTRAL OAHU...STREAMS REMAIN HIGH...WITH THE PUNALUU STREAM IN PUNALUU AND THE OPAEULA STREAM FLOWING THROUGH CENTRAL OAHU AND THE NORTH SHORE CONTINUING TO SHOW RISES IN WATER LEVELS. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PUNALUU... LAIE...HAUULA...MILILANI...AND WAHIAWA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS FLASH 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 1000 PM HST IF FLASH FLOODING PERSISTS. LAT...LON 2153 15811 2175 15796 2152 15781 2135 15809 $$ WROE
236 WGHW70 PHFO 280754 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 954 PM HST SUN JAN 27 2013 HIC003-280759- /O.CAN.PHFO.FF.W.0026.000000T0000Z-130128T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HONOLULU HI- 954 PM HST SUN JAN 27 2013 ...THE FLASH FLOOD WARNING IS CANCELLED FOR THE ISLAND OF OAHU IN HONOLULU COUNTY... WEATHER RADAR AND RAIN GAGES SHOWED THAT THE HEAVY RAINS AROUND CENTRAL AND WINDWARD OAHU HAVE DIMINISHED. THUS THE FLASH FLOOD WARNING IS CANCELLED. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR OAHU AND MAUI COUNTY UNTIL MONDAY AFTERNOON. LAT...LON 2153 15811 2175 15796 2152 15781 2135 15809 $$ REYNES
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 Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Jan 27, 6:44 PM HST, 19 minutes earlier.
Area forecast discussion, Jan 27, 6:44 PM HST, 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 644 PM HST SUN JAN 27 2013 .UPDATE... INCREASED CHANCES FOR RAIN ALONG THE FRONT FOR TONIGHT AND MONDAY MORNING. THIS MOSTLY AFFECTED THE ISLANDS OF OAHU AND MOLOKAI AND SURROUNDING COASTAL WATERS. && .SYNOPSIS... A COLD FRONT HAS REACHED KAUAI AND WILL MOVE SLOWLY SOUTHEAST ACROSS THE ISLAND CHAIN TONIGHT AND MONDAY. RAINFALL MAY BE HEAVY ALONG AND AHEAD OF THE FRONT...WITH SHARPLY DECREASED RAINFALL EXPECTED AFTER FRONTAL PASSAGE. TRADE WINDS ARE EXPECTED TO RETURN BEGINNING ON TUESDAY...ALONG WITH DRIER CONDITIONS AND MAINLY WINDWARD AND MAUKA SHOWERS. && .PREV DISCUSSION.../ISSUED 330 PM HST SUN JAN 27 2013/ SATELLITE LOOP...RADAR AND A TIMELY ASCAT PASS SHOW THAT A WIND SHIFT LINE...LIKELY THE FRONT...HAS REACHED KAUAI AND IS ABOUT TO EMERGE INTO THE KAUAI CHANNEL LATE THIS AFTERNOON. A LINE OF HEAVY SHOWERS WRAPPING AROUND THE SOUTH AND EAST FACING SHORES OF KAUAI WHICH HAD APPEARED TO BE DRIFTING NORTH NOW APPEARS TO BE MOVING EASTWARD. IN CONTRAST...ANOTHER LINE OF HEAVY SHOWERS WITHIN THE KAUAI CHANNEL HALFWAY BETWEEN KAUAI AND OAHU IS STILL MOVING TOWARD THE NORTHEAST. EVEN MORE HEAVY SHOWERS ARE FORMING SOUTH THROUGH WEST OF OAHU...HEADED NORTHEASTWARD. GIVEN THIS EVIDENCE WE EXPECT HEAVY RAINFALL REMAINS POSSIBLE FOR KAUAI AND NIIHAU...BUT WE HAVE REMOVED THE THREAT OF THUNDERSTORMS FOR THOSE ISLANDS. BOUTS OF HEAVY SHOWERS...ALONG WITH A SLIGHT CHANCE OF THUNDERSTORMS...WILL SHIFT EAST TO THE KAUAI CHANNEL...OAHU AND POSSIBLY WESTERN MOLOKAI THIS EVENING AND OVERNIGHT. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR NIIHAU...KAUAI AND OAHU THROUGH MONDAY AFTERNOON. ENHANCED SHOWERS...SOME HEAVY...MAY ALSO OCCUR FARTHER SOUTHEAST DOWN THE ISLAND CHAIN...BUT THE LIKELIHOOD IS LOWER SINCE WE EXPECT THE FRONT TO GRADUALLY WEAKEN AS IT MOVES SOUTHEASTWARD. MODELS SHOW RESIDUAL SHOWERS MAY LINGER ACROSS MAUI COUNTY AND POSSIBLY THE BIG ISLAND THROUGH TUESDAY. MOST OF THE ENERGY ASSOCIATED WITH THE SUPPORTING UPPER TROUGH IS NORTH OF THE MAIN ISLANDS...BUT TEMPERATURES ALOFT ARE COLD ENOUGH AND INSTABILITY IS HIGH ENOUGH TO SUPPORT A SLIGHT CHANCE OF THUNDERSTORMS IN THE FORECAST THROUGH TONIGHT. IF THUNDERSTORMS OCCUR...THE MAIN THREAT WILL BE ACROSS OAHU...WESTERN MOLOKAI AND ADJACENT WATERS. AFTER TONIGHT...HEAVY RAINFALL IS STILL POSSIBLE FOR THE CENTRAL ISLANDS...BUT THE THREAT OF THUNDERSTORMS HAS BEEN REMOVED FROM THE FORECAST. MODELS DISAGREE ON THE SPEED OF THE FRONT ACROSS THE ISLANDS AND WHETHER OR NOT THE FRONT DISSIPATES NEAR MAUI OR PASSES BEYOND THE BIG ISLAND...SO OUR FORECAST MAY BE ADJUSTED FURTHER AS THIS EVENT UNFOLDS. WE CONTINUE TO FAVOR THE GFS SOLUTION GIVEN ITS SLIGHTLY BETTER INITIALIZATION AND RUN-TO-RUN CONSISTENCY. THE FRONT WILL WEAKEN AND EVENTUALLY DISSIPATE AS ITS PARENT LOW MOVES WELL AWAY FROM THE AREA BY LATE MONDAY AND INTO EARLY TUESDAY. HOWEVER...AS TRADE WINDS RETURN LATER IN THE WEEK...ENOUGH REMNANT MOISTURE WILL LINGER ACROSS THE MAIN HAWAIIAN ISLANDS TO FUEL WINDWARD AND MAUKA SHOWERS. SOME SNOW SHOWERS ARE POSSIBLE AT THE BIG ISLAND SUMMITS WITH COLD TEMPERATURES ALOFT MONDAY LATE AFTERNOON AND EVENING. && .AVIATION... MOST TAF SITES ARE PRESENTLY EXPERIENCING VFR CONDITIONS EXCEPT FOR PHLI WHERE THERE HAS BEEN OCNL MVFR AND IFR CONDITIONS ASSOCIATED WITH PASSING SHOWERS. AIRMET TANGO IS IN EFFECT FOR THE ENTIRE AREA FOR TEMPO MODERATE TURB BETWEEN FL300 AND FL400...AND BLW 090 FOR KAUAI AND OAHU. AIRMET SIERRA IS IN EFFECT FOR MOUNTAIN OBSC FOR KAUAI AND MAY NEED TO BE EXTENDED TO OAHU SHORTLY. AIRMET ZULU IS IN EFFECT FOR KAUAI AND ADJ WATERS FOR MOD RIME ICE INC IN PRECIPITATION LYR 125-180. && .MARINE... A FRONTAL PASSAGE WILL BRING CHOPPY CONDITIONS ACROSS THE LEEWARD WATERS AROUND THE SMALLER ISLANDS THROUGH LATE MONDAY. HEAVY RAINS AND THUNDERSTORMS ARE POSSIBLE ACROSS PORTIONS OF COASTAL WATERS OVERNIGHT TONIGHT. THERE IS ENOUGH ENERGY EXPECTED WITH THE NEXT NORTHWEST SWELL TO PROMPT ISSUANCE OF HIGH SURF WARNINGS FOR EXPOSED NORTH AND/OR WEST SHORES OF THE SMALLER ISLANDS...BEGINNING AT 6 PM HST TODAY AND LASTING THROUGH MONDAY AFTERNOON. HIGH SURF ADVISORIES ARE IN EFFECT SPECIFICALLY FOR WEST FACING SHORES OF OAHU AND THE BIG ISLAND FOR THE SAME TIME PERIOD. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH MONDAY AFTERNOON FOR NIIHAU-KAUAI-OAHU. HIGH SURF WARNING FROM 6 PM HST TODAY THROUGH 6 PM HST MONDAY FOR NORTH AND WEST FACING SHORES OF NIIHAU AND KAUAI...AND NORTH FACING SHORES OF OAHU MOLOKAI AND MAUI. HIGH SURF ADVISORY FROM 6 PM HST TODAY THROUGH 6 PM HST MONDAY FOR WEST FACING SHORES OF OAHU AND THE BIG ISLAND. && UPDATE...FOSTER DISCUSSION/MARINE...POWELL AVIATION...BURKE
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 27, 3:23 PM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Jan 27, 3:30 PM HST | Small Craft Advisory | HFO | 54 hr | |
| Jan 27, 4:05 PM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
| Jan 27, 6:32 PM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
| Jan 27, 7:16 PM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Jan 27, 8:21 PM HST | Special Marine Warning | HFO | 54 min | |
| Jan 27, 9:30 PM HST | Areal Flood Advisory | HFO | Honolulu | 75 min |
| Jan 27, 9:46 PM HST | Areal Flood Advisory | HFO | Kalawao | 4 hr |
| Jan 28, 8:55 AM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Jan 28, 9:20 AM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Jan 28, 9:35 AM HST | Flash Flood Warning | HFO | Kalawao | 3 hr |
| Jan 28, 10:14 AM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2013Every flash flood warning in 2013
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.