Alert archive / Alaska / Flash Flood Warnings in 2004

Flash Flood Warning 3, NWS Fairbanks, AK

July 20, 2004

NWS Fairbanks, AK issued this flash flood warning at Jul 20, 2004, 12:30 PM AKDT. It was in force for 21 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: Jul 20, 2004, 12:30 PM AKDT (20:30 UTC)
Expired: Jul 21, 2004, 9:30 AM AKDT
In force: 21 hr
Issued by: NWS Fairbanks, AK
Area: Counties, with a storm outline in the text

The nearest sounding before it

Fairbanks, (PFAI), launched 12:00Z, 8.5 hours before the alert went out and 93 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: 31 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1425 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 30 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 
WGAK59 PAFG 210243 RRA
FFWAFG
AKZ220-222-224-210200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FAIRBANKS AK
530 PM ADT TUE JUL 20 2004

THE NATIONAL WEATHER SERVICE IN FAIRBANKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MIDDLE TANANA VALLEY AREA
  UPPER TANANA VALLEY AND
  YUKON FLATS AND SURROUNDING UPLANDS AREA OF ALASKA
  THIS INCLUDES THE CITY OF TWELVEMILE SUMMIT

* UNTIL 830 PM ADT

* AT 525 PM ADT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 14 MILES SOUTH OF TWELVEMILE
  SUMMIT...OR ABOUT 11 MILES NORTH OF CHENA HOT SPRINGS. THE STORM
  PRODUCING FLASH FLOODING WAS NEARLY STATIONARY.

* THE STORM PRODUCING FLASH FLOODING WILL AFFECT PORTIONS OF THE  
  BOUNDARY AND WOLF CREEK FIRE COMPLEXES REMAINING OVER MAINLY 
  UNPOPULATED AREAS. FIRE CREWS SHOULD TAKE PRECAUTIONS TO SECURE 
  EQUIPMENT AND MOVE TO HIGHER GROUND.

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.

LAT...LON 6512 14636 6516 14563 6544 14563 6538 14651

$$

RF/AT JUL 04

1 follow-up statement

000 
WGAK79 PAFG 210430
FFSAFG
AKZ220-222-224-210435-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FAIRBANKS AK
830 PM ADT TUE JUL 20 2004

THE FLASH FLOOD WARNING FOR AREAS ALONG AND NEAR THE
STEESE HIGHWAY FROM THE SOURDOUGH CAMP AREA TO TWELVE
MILE SUMMIT IS CANCELED. HEAVY RAINS IN THE AREA ENDED
AROUND 7 PM AND WATER LEVELS IN SMALL STREAMS HAVE
LIKELY RETURNED TO BELOW BANK FULL. THERE IS NO
FURTHER DANGER OF FLASH FLOODING.

THIS IS THE LAST STATEMENT WITH THIS FLASH FLOOD WARNING.

$$

RF JUL 04

Nearby

Flash Flood Warnings in Alaska, 2004 Every flash flood warning in 2004

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.