Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 232, NWS Gray, ME
NWS Gray, ME issued this severe thunderstorm warning at Sep 27, 2007, 9:26 AM EDT for Strafford County, New Hampshire. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 27, 2007, 9:26 AM EDT (13:26 UTC)
- Expired
- Sep 27, 2007, 10:00 AM EDT
- In force
- 34 min
- Issued by
- NWS Gray, ME
- Area
- Counties, with a storm outline in the text
County Strafford County, NH
The radar
The Portland,ME radar (KGYX), 91 km from the middle of the area, began a volume at 13:29 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
Albany, NY (KALY), launched 12:00Z, 1.4 hours before the alert went out and 238 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
- 924 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Sep 27, 2:39 AM EDT, 6 hours 47 minutes earlier.
Area forecast discussion, Sep 27, 2:39 AM EDT, 6 hours 47 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 239 AM EDT THU SEP 27 2007 .SYNOPSIS... A WEAK FRONT HAS STALLED OVER CENTRAL SECTIONS OF THE FORECAST AREA. SEVERAL WEAK WAVES OF LOW PRESSURE WILL MOVE ALONG THE FRONT TODAY INTO FRIDAY. BY LATE FRIDAY A COLD FRONT WILL SWEEP ACROSS THE AREA. HIGH PRESSURE WILL BUILD ACROSS THE AREA ON SATURDAY...THEN CREST OVER THE REGION ON SUNDAY. A RETURN SOUTHWESTERLY FLOW WILL DEVELOP ON THE BACK SIDE OF THE HIGH LATE MONDAY INTO WEDNESDAY. && .NEAR TERM /THROUGH TODAY/... A TROPICAL LIGHT SLY FLOW WILL CONTINUE OVER THE AREA TODAY AS A STALLED WEAK FRONT GRADUALLY BECOMES WASHED OUT. SEVERAL WEAK WAVES OF LOW PRES WILL MOVE ALONG THE WASHED OUT FRONT PRODUCING BANDS OF SHOWERS AND SCATTERED TSTMS AT TIMES. TEMPS WILL BE NOT AS WARM AS YESTERDAY DUE TO THE CLOUDS AND SHWRS BUT DEWPOINTS WILL REMAIN HIGH ALLOWING HUMIDITIES TO REMAIN HIGH. WINDS WILL REMAIN LIGHT. POPS WILL BE HIGH. && .SHORT TERM /TONIGHT/... A CONTINUED TROPICAL REGIME IS EXPECTED TONIGHT ON THE LIGHT SOUTHERLY FLOW. THE AIR MASS WILL REMAIN UNSTABLE AS THE LONG WAVE TROF APPROACHES FROM THE WEST. VERY HIGH POPS MAKES SENSE WITH SHOWERS AND SCATTERED TSTMS CONTINUING. AREAS OF FOG WILL ALSO DEVELOP DUE TO THE LIGHT FLOW AND CONDITIONS CLOSE TO SATURATION IN THE LOW LEVELS. TEMPS WILL ONCE AGAIN BE MILD AND IT WILL FEEL MORE LIKE A SUMMER EVENING DUE TO THE HIGH HUMIDITIES. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... PRECIPITATION WILL BECOME MORE STRATIFORM AS LOW PRESSURE MOVES NORTHEAST THROUGH THE REGION...AND TAPER OFF AS THE LOW HEADS TO THE GULF OF SAINT LAWRENCE LATE FRIDAY. EXPECT ABOUT THREE QUARTERS OF AN INCH OF RAIN IN THE HILLS AND CLOSER TO A QUARTER NEAR THE COAST. A FEW SHOWERS WILL LINGER IN THE MOUNTAINS THROUGH EARLY SATURDAY AS COLD AIR STARTS ADVECTING ON BRISK NORTHWESTERLY WINDS. REMAINING FAIRLY COOL THROUGH THE WEEKEND WITH HIGHS IN THE 60S...BUT LOWS DIPPING TO THE 30S TO LOWER 40S SATURDAY NIGHT. THINGS START WARMING UP AGAIN FOR THE BEGINNING OF NEXT WEEK AS THE HIGH MOVES OFFSHORE. LITTLE CHANGE THROUGH WEDNESDAY EXCEPT FOR A WEAK SHORT WAVE THAT COULD TRIGGER A FEW SHOWERS IN NORTHERN AREAS TUESDAY NIGHT. && .AVIATION /06Z THURSDAY THROUGH MONDAY/... SHORT TERM...VFR CONDITIONS WILL GRADUALLY DETERIORATE TO MVFR AND IFR CONDITIONS TODAY AS SHOWERS AND TSTMS DEVELOP. IN THE MORNING SOME AREAS OF FOG IN SOME LOW LYING AREAS WILL CREATE LIFR CONDS INTO THE MID MORNING HOURS. BY LATER TODAY AND TONIGHT ALL AREAS SHOULD BE MVFR TO IFR IN SHOWERS AND AREAS OF FOG WITH EVEN A FEW TSTMS PSBL. LONG TERM...CONTINUED MVFR TO IFR IN RAIN AND FOG FRIDAY BUT IMPROVING TO VFR BY THE END OF THE DAY. BRISK NORTHWESTERLY BREEZES DEVELOPING FRIDAY NIGHT AND SATURDAY. && .MARINE... SHORT TERM...A LIGHT SOUTHERLY TROPICAL FLOW WILL CONTINUE TODAY AND TONIGHT. SEAS TO REMAIN IN THE 2-4 FT RANGE. CONDITIONS WILL REMAIN BELOW SCA CRITERIA. TROPICAL SHOWERS AND AREAS OF FOG WILL REDUCE VSBYS AT TIMES...ESPECIALLY TONIGHT. LONG TERM...CONDITIONS COULD APPROACH SCA CRITERIA IN COLD AIR ADVECTION FRIDAY NIGHT INTO SATURDAY. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. &&
Hazardous weather outlook, Sep 27, 6:12 AM EDT, 3 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 612 AM EDT THU SEP 27 2007 ANZ150-MEZ007>009-012>014-018>028-NHZ001>010-013-014-281015- STONINGTON ME TO MERRIMACK RIVER MA OUT TO 25 NM-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-NORTHERN COOS-SOUTHERN COOS- NORTHERN GRAFTON-NORTHERN CARROLL-SOUTHERN GRAFTON-SOUTHERN CARROLL- SULLIVAN-MERRIMACK-BELKNAP-STRAFFORD-INTERIOR ROCKINGHAM- COASTAL ROCKINGHAM- 612 AM EDT THU SEP 27 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE...NORTHERN NEW HAMPSHIRE...SOUTHEASTERN NEW HAMPSHIRE AND THE COASTAL WATERS FROM STONINGTON ME TO THE MERRIMACK RIVER MA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. WEAK IMPULSES WILL MOVE ALONG A STALLED FRONT ACROSS CENTRAL MAINE AND BRING AREAS OF SHOWERS AND A FEW THUNDERSTORMS. A STRONGER LOW WILL BRING A MORE WIDESPREAD STEADY RAIN TONIGHT INTO FRIDAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, Sep 27, 7:28 AM EDT, 1 hour 58 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 |
|---|---|---|---|---|
| Sep 27, 8:15 AM EDT | Severe Thunderstorm Warning | GYX | York | 45 min |
| Sep 27, 8:46 AM EDT | Special Marine Warning | GYX | 59 min | |
| Sep 27, 10:18 AM EDT | Severe Thunderstorm Warning | GYX | York | 42 min |
| Sep 27, 10:48 AM EDT | Special Marine Warning | GYX | 57 min | |
| Sep 27, 3:29 PM EDT | Severe Thunderstorm Warning | GYX | Oxford | 31 min |
| Sep 27, 5:02 PM EDT | Severe Thunderstorm Warning | GYX | Oxford | 28 min |
| Sep 27, 5:32 PM EDT | Severe Thunderstorm Warning | GYX | Franklin | 43 min |
| Sep 27, 6:20 PM EDT | Severe Thunderstorm Warning | GYX | Franklin, Somerset | 40 min |
| Sep 27, 2:50 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 40 min |
| Sep 27, 2:52 PM EDT | Severe Thunderstorm Warning | GYX | Coos | 38 min |
| Sep 27, 3:25 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack, Sullivan | 35 min |
| Sep 27, 3:41 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Grafton | 34 min |
| Sep 27, 4:01 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 44 min |
| Sep 27, 4:15 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Grafton | 45 min |
| Sep 27, 4:18 PM EDT | Severe Thunderstorm Warning | GYX | Coos | 42 min |
| Sep 27, 4:43 PM EDT | Severe Thunderstorm Warning | GYX | Carroll | 47 min |
| Sep 27, 4:57 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 48 min |
Nearby
Severe Thunderstorm Warnings in New Hampshire, 2007Every severe thunderstorm 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; radar from the NEXRAD Level II archive.