Alert archive / New Hampshire / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Gray, ME
NWS Gray, ME issued this flash flood warning at Jun 8, 2021, 3:14 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 2 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
- Jun 8, 2021, 3:14 PM EDT (19:14 UTC)
- Expired
- Jun 8, 2021, 5:27 PM EDT
- In force
- 2 hr
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cheshire County, NH, Hillsborough County, NH
The radar
The Boston radar (KBOX), 111 km from the middle of the area, began a volume at 19:18 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, 7.2 hours before the alert went out and 157 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
- 289 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
709
WGUS51 KGYX 081914
FFWGYX
NHC005-011-082215-
/O.NEW.KGYX.FF.W.0001.210608T1914Z-210608T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gray ME
314 PM EDT Tue Jun 8 2021
The National Weather Service in Gray has issued a
* Flash Flood Warning for...
Southeastern Cheshire County in southern New Hampshire...
Southwestern Hillsborough County in southern New Hampshire...
* Until 615 PM EDT.
* At 314 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 1.5 inches of rain have fallen. The expected rainfall rate
is 2 to 4 inches in the next 2 hours. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Jaffrey, Milford, Rindge, Fitzwilliam, Mason, New Ipswich, Temple,
Greenville, Sharon, and Wilton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 4280 7211 4282 7179 4281 7165 4271 7167
4272 7211
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...2-4 INCHES IN 2 HOURS
$$
MEC1 follow-up statement
149
WGUS71 KGYX 082127
FFSGYX
Flash Flood Statement
National Weather Service Gray ME
527 PM EDT Tue Jun 8 2021
NHC005-011-082137-
/O.CAN.KGYX.FF.W.0001.000000T0000Z-210608T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheshire NH-Hillsborough NH-
527 PM EDT Tue Jun 8 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN CHESHIRE AND
SOUTHWESTERN HILLSBOROUGH COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 1000 PM EDT for Portions
of southern New Hampshire.
LAT...LON 4280 7211 4282 7179 4281 7165 4271 7167
4272 7211
$$
TubbsThe office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 3:24 PM EDT | Flash Flood Watch | GYX | Cheshire, Hillsborough | 6 hr |
| Jun 8, 3:30 PM EDT | Flash Flood Warning | GYX | Hillsborough | 2 hr |
| Jun 8, 3:53 PM EDT | Flash Flood Warning | GYX | Cheshire | 5 hr |
| Jun 8, 4:52 PM EDT | Special Weather Statement | GYX | Strafford | 38 min |
| Jun 8, 4:53 PM EDT | Special Weather Statement | GYX | Cheshire | 37 min |
| Jun 8, 4:56 PM EDT | Special Weather Statement | GYX | Merrimack | 34 min |
| Jun 8, 5:15 PM EDT | Special Weather Statement | GYX | Cheshire | 45 min |
| Jun 8, 5:50 PM EDT | Areal Flood Advisory | GYX | Hillsborough | 3 hr |
| Jun 8, 6:24 PM EDT | Areal Flood Advisory | GYX | Merrimack, Rockingham, Strafford | 115 min |
Nearby
Flash Flood Warnings in New Hampshire, 2021Every flash flood warning in 2021
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.