Alert archive / Alaska / Flash Flood Warnings in 2009

Flash Flood Warning 3, NWS Anchorage, AK

March 26, 2009

NWS Anchorage, AK issued this flash flood warning at Mar 26, 2009, 9:05 AM AKDT. It was in force for 9 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 26, 2009, 9:05 AM AKDT (17:05 UTC)
Expired: Mar 26, 2009, 6:00 PM AKDT
In force: 9 hr
Issued by: NWS Anchorage, AK
Area: Storm-based polygon

The nearest sounding before it

Anchorage Iap/Pt. Campbe, (PANC), launched 12:00Z, 5.1 hours before the alert went out and 145 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: 1116 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 369 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 
WGAK58 PAFC 261705
FFWAFC
AKZ145-262300-
/O.NEW.PAFC.FF.W.0003.090326T1705Z-090326T2300Z/
/00000.0..000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ANCHORAGE AK
905 AM AKDT THU MAR 26 2009

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DRIFT RIVER

* UNTIL 300 PM AKDT

* DUE TO THE ERUPTION OF REDOUBT VOLCANO.

THE ERUPTION OF REDOUBT VOLCANO CAN CAUSE MELTING SNOW AND ICE ON 
THE MOUNTAIN AND RESULT IN HIGH WATER AND FLASH FLOODING ALONG  
DRIFT RIVER DRAINING FROM THE MOUNTAIN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 6064 15246 6061 15217 6047 15236 6056 15249

$$

SEB

1 follow-up statement

000 
WGAK58 PAFC 262253
FFWAFC
AKZ145-270200-
/O.EXT.PAFC.FF.W.0003.000000T0000Z-090327T0200Z/
/00000.0.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ANCHORAGE AK
253 PM AKDT THU MAR 26 2009

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  DRIFT RIVER

* UNTIL 600 PM AKDT

* DUE TO THE ERUPTION OF REDOUBT VOLCANO.

THIS MORNINGS ERUPTIONS OF REDOUBT VOLCANO PRODUCED MELTING SNOW 
AND ICE ON THE MOUNTAIN. THIS HAS RESULTED IN HIGH WATER AND FLASH 
FLOODING ALONG DRIFT RIVER DRAINING FROM THE MOUNTAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 6064 15246 6061 15217 6047 15236 6056 15249

$$

SEB

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

Issued	Product	Office	Lasted
Mar 25, 4:00 PM AKDT	Gale Warning	AFC	60 hr
Mar 25, 4:00 PM AKDT	Gale Warning	AFC	12 hr
Mar 25, 4:00 PM AKDT	Small Craft Advisory	AFC	36 hr
Mar 25, 4:00 PM AKDT	Small Craft Advisory	AFC	48 hr
Mar 25, 5:05 PM AKDT	Gale Warning	AFC	11 hr
Mar 26, 4:00 AM AKDT	Brisk Wind Advisory	AFC	36 hr
Mar 26, 4:00 AM AKDT	Gale Warning	AFC	3 days
Mar 26, 4:00 AM AKDT	Gale Warning	AFC	24 hr
Mar 26, 4:00 AM AKDT	Small Craft Advisory	AFC	24 hr
Mar 26, 4:00 AM AKDT	Small Craft Advisory	AFC	36 hr
Mar 26, 4:00 AM AKDT	Small Craft Advisory	AFC
Mar 26, 4:00 AM AKDT	Heavy Freezing Spray Warning	AFC	4 days
Mar 26, 4:00 AM AKDT	Heavy Freezing Spray Warning	AFC
Mar 26, 8:45 AM AKDT	Small Craft Advisory	AFC	19 hr
Mar 26, 8:45 AM AKDT	Heavy Freezing Spray Warning	AFC	31 hr
Mar 26, 9:44 AM AKDT	Ashfall Advisory	AFC	8 hr

Nearby

Flash Flood Warnings in Alaska, 2009 Every flash flood warning in 2009

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.