Alert archive / New Hampshire / Flash Flood Warnings in 2008
Flash Flood Warning 10, NWS Gray, ME
NWS Gray, ME issued this flash flood warning at Aug 10, 2008, 4:58 PM EDT for Belknap County, New Hampshire. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2008, 4:58 PM EDT (20:58 UTC)
- Expired
- Aug 10, 2008, 8:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Flood severity
- None
County Belknap County, NH
The radar
The Portland,ME radar (KGYX), 103 km from the middle of the area, began a volume at 20:59 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.
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 9.0 hours before the alert went out and 102 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
- 820 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Gray, ME wrote its last area forecast discussion before this flash flood warning went out at Aug 10, 2:44 PM EDT, 2 hours 14 minutes earlier.
Area forecast discussion, Aug 10, 2:44 PM EDT, 2 hours 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 244 PM EDT SUN AUG 10 2008 .SYNOPSIS... LOW PRESSURE CENTERED NEAR LAKE HURON WILL DIVE SOUTHEAST AND REFORM ALONG THE NEW JERSEY COAST EARLY MONDAY MORNING. THIS LOW WILL MOVE THROUGH THE GULF OF MAINE TUESDAY AND INTO THE CANADIAN MARITIMES WHERE IT WILL REMAIN NEARLY STATIONARY INTO FRIDAY. HIGH PRESSURE WILL CREST OVER THE AREA FRIDAY AND SATURDAY. LOW PRESSURE WILL APPROACH THE AREA SUNDAY. && .NEAR TERM /THROUGH TONIGHT/... CONVECTION FIRING ACROSS THE REGION THIS AFTERNOON...MUCH AS EXPECTED. STORM MOTION HAS BEEN VERY SLOW...AROUND 10KTS. THIS IS PRODUCING A SIGNIFICANT FLASH FLOODING THREAT. WILL EXTEND THE FLASH FLOOD WATCH FOR NH THROUGH MIDNIGHT. && .SHORT TERM /MONDAY/... MODELS CONTINUE TO HAVE PROBLEMS HANDLING THE SYSTEM FOR MONDAY. ALL ARE PRODUCING PRECIPITATION...BUT AMOUNTS AND TIMING VARY A BIT. POPS ARE EXPECTED TO BE PRETTY HIGH...WITH LOW CONFIDENCE IN QPF AMOUNTS. && .LONG TERM /MONDAY NIGHT THROUGH SUNDAY/... SLOW-MOVING LOW PRESSURE WILL CROSS THE AREA MONDAY NIGHT AND TUESDAY...THEN MOVES OFF INTO THE MARITIMES TUESDAY NIGHT AND WEDNESDAY. ANOTHER LOW WILL PASS WELL OFFSHORE THURSDAY AND THURSDAY NIGHT. OTHERWISE...AN UPPER LEVEL LOW WILL MAINTAIN UNSETTLED WEATHER AND THE PROSPECT OF A FEW SHOWERS ACROSS THE AREA EACH DAY. THE UPPER TROUGH WILL STICK AROUND FOR THE BALANCE OF THE PERIOD WITH UNSETTLED WEATHER AND TEMPERATURES NEAR OR BELOW NORMAL. NUMERICALS DIFFER ON TIMING OF INDIVIDUAL IMPULSES BUT IT SEEMS SAFE TO SAY THAT WE CAN EXPECT AT LEAST SOME PRECIPITATION ACROSS THE AREA EACH DAY. SLOW-MOVING LOW PRESSURE TRAVERSES THE AREA MONDAY NIGHT AND TUESDAY BRINGING A MORE ORGANIZED PRECIPITATION EVENT. THIS LOW MOVES OFF INTO THE MARITIMES TUESDAY NIGHT. WE FIND OURSELF WITH SOME WEAK RIDGING ON WEDNESDAY...BUT NOT ENOUGH TO PRECLUDE A FEW SHOWERS GIVEN THE LINGERING MOISTURE AND CYCLONIC FLOW. A SECOND SURFACE LOW PASSES WELL OFFSHORE THURSDAY AND THURSDAY NIGHT AND IT APPEARS WELL MISS THE HEAVIER PRECIPITATION WITH THIS DISTURBANCE. HOWEVER...THE CYCLONIC FLOW AND LINGERING MOISTURE ACROSS THE REGION WILL STILL RESULT IN A FEW SHOWERS FROM THURSDAY INTO THE UPCOMING WEEKEND. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... SHORT TERM...EXPECT SHOWERS AND THUNDERSTORMS TO AFFECT THE REGION THIS AFTERNOON AND EVENING. SKIES SHOULD CLEAR BRIEFLY BEFORE FOG/STRATUS FORM UP AND GENERATE IFR/LIFR CONDITIONS. LONG TERM...EXPECT MOSTLY MVFR/IFR MONDAY NIGHT THROUGH TUESDAY MORNING IN SHOWERS AND FOG. TUESDAY EXPECT IMPROVEMENT TO VFR WITH BRIEF MVFR CONDITIONS IN AFTN SHRA/TSRA. TUESDAY NIGHT AND WED NIGHT EXPECT IFR IN FOG. WED AND THU EXPECT VFR EXCEPT MVFR IN SHRA. && .MARINE... SHORT TERM...NO PROBLEMS EXPECTED. LONG TERM...WE MAY BRIEFLY APPROACH SCA WINDS AND SEAS MONDAY NIGHT AND EARLY TUESDAY AS SURFACE LOW DEVELOPS THEN TRACKS JUST TO THE SOUTH OF THE WATERS. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...FLASH FLOOD WATCH UNTIL MIDNIGHT EDT TONIGHT FOR NHZ001>009. MARINE...NONE. && SYNOPSIS...POHL NEAR TERM...POHL SHORT TERM...POHL LONG TERM...POHL/SCHWIBS AVIATION...POHL/SCHWIBS MARINE...POHL/SCHWIBS
Hazardous weather outlook, Aug 10, 3:08 PM EDT, 1 hour 50 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 308 PM EDT SUN AUG 10 2008 ANZ150>154-111915- STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY- PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY- CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM- 308 PM EDT SUN AUG 10 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. MEZ007>009-012>014-018>028-NHZ010-013-014-111915- NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD- SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK- INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO- COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO- STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM- 308 PM EDT SUN AUG 10 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE. .DAY ONE...THIS AFTERNOON AND TONIGHT SLOW MOVING SHOWERS AND THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HEAVY RAIN IS POSSIBLE MONDAY. FLOOD WATCHES MAY BE NEEDED. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN THEIR REPORTS. NHZ001>009-111915- NORTHERN COOS-SOUTHERN COOS-NORTHERN GRAFTON-NORTHERN CARROLL- SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP- 308 PM EDT SUN AUG 10 2008 ...FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW HAMPSHIRE AND NORTHERN NEW HAMPSHIRE. .DAY ONE...THIS AFTERNOON AND TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. SLOW MOVING SHOWERS AND THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HEAVY RAIN IS POSSIBLE MONDAY. FLOOD WATCHES MAY BE NEEDED. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO CALL OR RADIO IN THEIR REPORTS.
In the hours before
Local storm report, Aug 10, 4:07 PM EDT, 51 minutes before
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</html>Local storm report, Aug 10, 4:42 PM EDT, 16 minutes before
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</html>The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:50 AM EDT | Flash Flood Watch | GYX | Franklin, Oxford | 20 hr |
| Aug 10, 2:06 PM EDT | Severe Thunderstorm Warning | GYX | York | 39 min |
| Aug 10, 2:44 PM EDT | Areal Flood Advisory | GYX | Franklin, Somerset | 3 hr |
| Aug 10, 2:44 PM EDT | Severe Thunderstorm Warning | GYX | York | 46 min |
| Aug 10, 7:50 PM EDT | Areal Flood Advisory | GYX | Franklin, Oxford | 3 hr |
| Aug 10, 1:12 PM EDT | Areal Flood Advisory | GYX | Belknap | 3 hr |
| Aug 10, 2:30 PM EDT | Severe Thunderstorm Warning | GYX | Grafton | 45 min |
| Aug 10, 3:04 PM EDT | Flash Flood Warning | GYX | Grafton | 4 hr |
| Aug 10, 3:32 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack | 58 min |
| Aug 10, 3:49 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 56 min |
| Aug 10, 3:54 PM EDT | Severe Thunderstorm Warning | GYX | Grafton | 36 min |
| Aug 10, 4:00 PM EDT | Areal Flood Advisory | GYX | Merrimack | 3 hr |
| Aug 10, 4:23 PM EDT | Areal Flood Advisory | GYX | Rockingham | 3 hr |
| Aug 10, 4:29 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 61 min |
| Aug 10, 4:35 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll | 55 min |
| Aug 10, 4:50 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Grafton, Merrimack | 70 min |
| Aug 10, 5:15 PM EDT | Severe Thunderstorm Warning | GYX | Carroll, Grafton | 60 min |
| Aug 10, 5:39 PM EDT | Areal Flood Advisory | GYX | Grafton | 3 hr |
| Aug 10, 5:41 PM EDT | Severe Thunderstorm Warning | GYX | Grafton, Merrimack | 64 min |
| Aug 10, 6:21 PM EDT | Areal Flood Advisory | GYX | Carroll | 3 hr |
| Aug 10, 6:30 PM EDT | Severe Thunderstorm Warning | GYX | Carroll, Coos, Grafton | 60 min |
| Aug 10, 7:01 PM EDT | Flash Flood Warning | GYX | Grafton, Merrimack | 3 hr |
| Aug 10, 7:32 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Grafton | 3 hr |
| Aug 10, 7:44 PM EDT | Flash Flood Warning | GYX | Carroll | 2 hr |
Nearby
Flash Flood Warnings in New Hampshire, 2008Every flash flood warning in 2008
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; radar from the NEXRAD Level II archive.