Alert archive / Alaska / Flash Flood Warnings in 2005

Flash Flood Warning 2, NWS Fairbanks, AK

July 1, 2005

NWS Fairbanks, AK issued this flash flood warning at Jul 1, 2005, 2:38 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 1, 2005, 2:38 PM AKDT (22:38 UTC)
Expired: Jul 2, 2005, 11:45 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, 10.6 hours before the alert went out and 60 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: 91 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 719 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 4 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 020343
FFWAFG
AKZ220-222-224-020645-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FAIRBANKS AK
738 PM ADT FRI JUL 1 2005

THE NATIONAL WEATHER SERVICE IN FAIRBANKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MIDDLE TANANA VALLEY AREA OF ALASKA
  THIS INCLUDES THE CITIES OF...SOURDOUGH CAMP...FOX...CHENA HOT
  SPRINGS...CHATANIKA
  UPPER TANANA VALLEY AND THE FORTYMILE COUNTRY AREA OF ALASKA
  YUKON FLATS AND SURROUNDING UPLANDS AREA OF ALASKA
  THIS INCLUDES THE CITIES OF...TWELVEMILE SUMMIT...EAGLE SUMMIT

* UNTIL 1045 PM ADT

* AT 737 PM ADT...THE PUBLIC REPORTED FLASH FLOODING FROM A   
THUNDERSTORM OVER THE WARNED AREA. THE CHATANIKA RIVER AT THE
STEESE HIGHWAY BRIDGE HAS COME UP RAPIDLY SINCE FRIDAY MORNING
AND IS WITHIN A FOOT OF FLOOD STAGE. RAINFALL AT AUTOMATIC
GAGES IN THE AREA IS FROM ONE TO TWO INCHES IN THE LAST 24 HOURS.

* THE FAIRBANKS WEATHER RADAR INDICATES HEAVY SHOWERS MOVING
THROUGH THE AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NOME CREEK
  CAMPGROUND AND HAYSTACK MOUNTAIN.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...AND SOME ROADS...

IN AREAS THAT WERE BURNED OVER IN 2004...THERE MAY BE DEBRIS AND
MUD FLOWS DOWN HILL SIDES. THIS PARTICULARLY AFFECTS THE STEESE
HIGHWAY UP BY 12 MILE SUMMIT AND EAGLE SUMMIT.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
FAIRBANKS.

LAT...LON 6495 14805 6487 14483 6564 14504 6538 14802

$$

TF JUL 05

1 follow-up statement

000 
WGAK79 PAFG 020656
FFSAFG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FAIRBANKS AK
1045 PM ADT FRI JUL 1 2005

AKZ220-222-224-020704-
YUKON FLATS AND SURROUNDING UPLANDS AK-MIDDLE TANANA VALLEY AK-
UPPER TANANA VALLEY AND THE FORTYMILE COUNTRY AK-
1045 PM ADT FRI JUL 1 2005

...THE FLASH FLOOD WARNING FOR UPPER TANANA VALLEY AND THE
FORTYMILE COUNTRY...MIDDLE TANANA VALLEY AND YUKON FLATS AND 
SURROUNDING UPLANDS EXPIRES AT 1045 PM ADT...

NATIONAL WEATHER SERVICE RADAR INIDICATES THAT SHOWERS OVER
THE STEESE HIGHWAY REGION HAVE DIMINISHED RAPIDLY DURING THE
PAST HOUR. AUTOMATIC RAIN GAUGES ARE STILL REPORTING RAINFALL
OVER THE AREA...BUT IT HAS DIMINISHED CONSIDERABLY.

SCATTERED SHOWERS...SOME OF THEM HEAVY BUT BRIEF...CAN BE
EXPECTED OVER THE AREA FOR THE REST OF THE NIGHT. THE
STATION AT NENANA REPORTED OVER ONE INCH OF RAIN BETWEEN
8 PM AND 9 PM. THE RAIN HAS ALREADY ENDED THERE.

LAT...LON 6495 14805 6487 14483 6564 14504 6538 14802

$$

TF JUL 05

Nearby

Flash Flood Warnings in Alaska, 2005 Every flash flood warning in 2005

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.