Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 91, NWS Gray, ME
NWS Gray, ME issued this severe thunderstorm warning at Jul 23, 2020, 5:25 PM EDT for Hillsborough County, Merrimack County, New Hampshire. It was in force for 50 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
- Jul 23, 2020, 5:25 PM EDT (21:25 UTC)
- Expired
- Jul 23, 2020, 6:15 PM EDT
- In force
- 50 min
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hillsborough County, NH, Merrimack County, NH
The radar
The Boston radar (KBOX), 136 km from the middle of the area, began a volume at 21:26 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 23, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 9.4 hours before the alert went out and 145 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
- 734 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 4:13 PM EDT | Special Weather Statement | GYX | Franklin | 32 min |
| Jul 23, 6:05 PM EDT | Special Weather Statement | GYX | Somerset | 25 min |
| Jul 22, 8:03 PM EDT | Special Weather Statement | GYX | Cheshire | 57 min |
| Jul 22, 9:05 PM EDT | Areal Flood Advisory | GYX | Cheshire | 3 hr |
| Jul 22, 10:16 PM EDT | Flash Flood Warning | GYX | Cheshire | 3 hr |
| Jul 22, 11:03 PM EDT | Special Weather Statement | GYX | Hillsborough, Rockingham | 57 min |
| Jul 22, 11:07 PM EDT | Areal Flood Advisory | GYX | Hillsborough, Merrimack, Rockingham | 113 min |
| Jul 23, 12:01 PM EDT | Special Weather Statement | GYX | Cheshire | 44 min |
| Jul 23, 12:30 PM EDT | Special Weather Statement | GYX | Cheshire | 30 min |
| Jul 23, 1:15 PM EDT | Areal Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 23, 1:15 PM EDT | Special Weather Statement | GYX | Hillsborough | 30 min |
| Jul 23, 1:39 PM EDT | Special Weather Statement | GYX | Rockingham | 36 min |
| Jul 23, 2:09 PM EDT | Special Weather Statement | GYX | Rockingham | 36 min |
| Jul 23, 2:10 PM EDT | Special Weather Statement | GYX | Hillsborough | 35 min |
| Jul 23, 2:15 PM EDT | Areal Flood Advisory | GYX | Rockingham | 3 hr |
| Jul 23, 3:24 PM EDT | Special Weather Statement | GYX | Strafford | 36 min |
| Jul 23, 4:40 PM EDT | Special Weather Statement | GYX | Strafford | 35 min |
| Jul 23, 4:41 PM EDT | Special Weather Statement | GYX | Sullivan | 34 min |
| Jul 23, 4:50 PM EDT | Special Weather Statement | GYX | Merrimack | 25 min |
| Jul 23, 5:09 PM EDT | Special Weather Statement | GYX | Merrimack | 36 min |
| Jul 23, 5:47 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Merrimack, Rockingham | 43 min |
| Jul 23, 5:54 PM EDT | Special Weather Statement | GYX | Cheshire | 36 min |
| Jul 23, 6:27 PM EDT | Special Weather Statement | GYX | Cheshire | 33 min |
| Jul 23, 6:47 PM EDT | Special Weather Statement | GYX | Grafton | 28 min |
| Jul 23, 6:54 PM EDT | Special Weather Statement | GYX | Hillsborough | 36 min |
Nearby
Severe Thunderstorm Warnings in New Hampshire, 2020Every severe thunderstorm warning in 2020
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.