Alert archive / Alaska / Flash Flood Warnings in 2007
Flash Flood Warning 2, NWS Fairbanks, AK
NWS Fairbanks, AK issued this flash flood warning at Apr 24, 2007, 6:57 AM AKDT. It was in force for 19 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
- Apr 24, 2007, 6:57 AM AKDT (14:57 UTC)
- Expired
- Apr 25, 2007, 1:30 AM AKDT
- In force
- 19 hr
- Issued by
- NWS Fairbanks, AK
- Area
- Counties, with a storm outline in the text
- Flood severity
- None
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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
Point Barrow, (PBRW), launched 12:00Z, 3.0 hours before the alert went out and 240 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGAK59 PAFG 241959 FFWAFG AKZ205-242030- /T.NEW.PAFG.FF.W.0001.070424T1957Z-070424T2030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED TEST...FLASH FLOOD WARNING...TEST NATIONAL WEATHER SERVICE FAIRBANKS AK 1157 AM ADT TUE APR 24 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... THE NATIONAL WEATHER SERVICE IN FAIRBANKS HAS ISSUED A * THIS IS A TEST MESSAGE. FLASH FLOOD WARNING FOR IVOTUK CREEK * UNTIL 1230 PM ADT * THIS IS A TEST MESSAGE. AT 1154 AM ADT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * THIS IS A TEST MESSAGE. THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER THE IVOTUK HILLS. THIS IS A TEST MESSAGE. 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. THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 6917 15885 6917 15834 6935 15834 6935 15885 $$ EWP
1 follow-up statement
000 WGAK79 PAFG 242020 FFSAFG TEST...FLASH FLOOD STATEMENT...TEST NATIONAL WEATHER SERVICE FAIRBANKS AK 1220 PM ADT TUE APR 24 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... AKZ205-242030- /T.CAN.PAFG.FF.W.0001.000000T0000Z-070424T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHWESTERN BROOKS RANGE AK- 1220 PM ADT TUE APR 24 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR IVOTUK CREEK... THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 6917 15885 6917 15834 6935 15834 6935 15885 $$ EWP
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 Fairbanks, AK wrote its last area forecast discussion before this flash flood warning went out at Apr 24, 12:36 AM AKDT, 6 hours 21 minutes earlier.
Area forecast discussion, Apr 24, 12:36 AM AKDT, 6 hours 21 minutes before
NORTHERN ALASKA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FAIRBANKS AK 536 AM ADT TUE APR 24 2007 .DISCUSSION... WEAK FLOW PATTERN ALOFT PERSISTING OVER THE FORECAST AREAS FOR THE NEXT WEEK. LITTLE TEMPERATURE CHANGE IS EXPECTED IN THE LOWER LEVELS. 12Z SURFACE MAP SHOWING WEAK TROUGH BETHEL-30 S TANANA- FAIRBANKS-EAGLE AND WEAK RIDGING OVER THE EASTERN NORTH GULF COAST. GRADIENT ACROSS THE ALASKA RANGE IS WEAK BUT PROBABLY ENOUGH FOR SOUTH WINDS GUSTING TO 15 MPH IN ALASKA RANGE PASSES DEVELOPING BY MID DAY. SATELLITE LOOP PICKING UP WEAK VORT CENTER NORTH OF PAOR...THIS FEATURE WILL LIKELY PRODUCE SCATTERED RAIN SHOWERS OVER THAT AREA TODAY. ELSEWHERE IN THE INTERIOR...WEAK INSTABILITY WITH ISOLATED AFTERNOON AND EVENING SHOWERS TODAY AND AGAIN WEDNESDAY. THE INSTABILITY IS EXPECTED TO SPREAD TO MUCH OF THE WEST COAST WEDNESDAY...CONTINUING THURSDAY. NORTHEAST WINDS TYPICALLY 10-20 MPH ARE EXPECTED TO DEVELOP OVER MUCH OF THE INTERIOR AS THE TROUGH NOW OVER THE CENTRAL INTERIOR DISSIPATES AND THE WIND FLOW BECOMES MORE ORGANIZED BETWEEN HIGH PRESSURE OVER THE ARCTIC AND A STRONG LOW PROGGED TO MOVE INTO THE GULF OF ALASKA. WINDS OVER THE ARCTIC COAST WILL REMAIN OUT THE EAST OR NORTHEAST AND INCREASE A LITTLE. CLOUDY CONDITIONS WITH SCATTERED FLURRIES AND AREAS OF FOG WILL CONTINUE. COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE && .FIRE WEATHER... MAX TEMPERATURES AND MIN RH TODAY EXPECTED TO BE SIMILAR TO CONDITIONS EXPERIENCED YESTERDAY. LITTLE CHANGE IS EXPECTED WEDNESDAY. WINDS WILL HAVE TO BE WATCHED THURSDAY AS SOME SITES MAY GUST TO AROUND 25 MPH. && .HYDROLOGY... NONE. && .AFG WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING FOR AKZ223-AKZ225. BRISK WIND ADVISORY FOR PKZ210-PKZ230-PKZ235-PKZ240-PKZ245. && RF APR 07
The office that day
Everything else NWS Fairbanks, AK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:42 PM AKDT | Brisk Wind Advisory | AFG | 11 hr | |
| Apr 24, 8:39 AM AKDT | Heavy Freezing Spray Warning | AFG | 32 hr |
Nearby
Flash Flood Warnings in Alaska, 2007Every flash flood warning in 2007
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.