Preview: automated baseline. Built automatically from federal data and not yet checked by hand. Check every figure against your own records before you use it in a plan.

Strafford County, NH

Risk-assessment baseline packet. County area 33017. Release 2026-10, data as of 2026-09-28.

Download the packet

PDF: PDF, for printing and reading. Word: Word document, tables ready to paste into a plan. Excel: Excel workbook, one sheet per section, full tables. JSON: Packet data (JSON), for analysts. Full packet as a web page. File manifest (checksums, source versions).

Plan clock

No county-level plan row in FEMA data

Map group: Absent from FEMA plan data.

What changed since your last plan

No county-level plan row in FEMA data, so there is no approval date to count from.

Plan status for every jurisdiction in the plan

13 jurisdictions. Each row is that jurisdiction's own plan clock. Notes include other approved plans FEMA lists for the same jurisdiction.

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Dover cityCityApproved, expires 2031-04-27Multi-Hazard Mitigation Plan Update City of Dover, NH 2026 (FEMA plan 111671)2026-04-282031-04-271,672
Rochester cityCityApproved, expires 2030-08-20Multi-Hazard Mitigation Plan Update, Rochester, NH (FEMA plan 110722)2025-08-212030-08-201,422
Somersworth cityCityApproved, expires 2027-02-16Multi-Hazard Mitigation Plan Update 2021, City of Somersworth, NH (FEMA plan 108123)2022-02-172027-02-16141
Barrington townTownApproved, expires 2029-02-19Multi-Hazard Mitigation Plan Update 2024, Town of Barrington, NH (FEMA plan 108725)2024-02-202029-02-19875
Durham townTownApproved, expires 2029-04-18Multi-Hazard Mitigation Plan Update 2024, Town of Durham, NH (FEMA plan 108845)2024-04-192029-04-18933
Farmington townTownApproved, expires 2031-05-07Multi-Hazard Mitigation Plan Update, Town of Farmington, NH 2026 (FEMA plan 111665)2026-05-082031-05-071,682
Lee townTownApproved, expires 2029-06-12Town of Lee, NH Hazard Mitigation Plan Update 2023 (FEMA plan 109380)2024-06-132029-06-12988
Madbury townTownApproved, expires 2030-06-10Multi-Hazard Mitigation Plan Update 2025 Town of Madbury, NH (FEMA plan 110785)2025-06-112030-06-101,351
Middleton townTownApproved, expires 2030-01-21Multi-Hazard Mitigation Plan Update 2024, Town of Middleton, NH (FEMA plan 110200)2025-01-222030-01-211,211
Milton townTownApproved, expires 2030-01-21Multi-Hazard Mitigation Plan Update 2023, Town of Milton, NH (FEMA plan 109367)2025-01-222030-01-211,211
New Durham townTownApproved, expires 2027-06-15Multi-Hazard Mitigation Plan Update 2022 Town of New Durham, NH (FEMA plan 108348)2022-06-162027-06-15260
Rollinsford townTownApproved, expires 2027-01-19Multi-Hazard Mitigation Plan Update 2022, Town of Rollinsford, NH (FEMA plan 108052)2022-01-202027-01-19113
Strafford townTownApproved, expires 2030-06-222024 Multi-Hazard Mitigation Plan Update Town of Strafford, NH (FEMA plan 110316)2025-06-232030-06-221,363

State plan status and tribal plans in this state: see the state page.

What the packet contains

Sections in FEMA checklist order. Each heading names the review item its tables support; whether the item is satisfied is decided by the plan and its reviewers. Full tables are in the downloads above.

Supports B1-a Hazards

16 of the 18 National Risk Index hazards apply here; omission evidence is shown only where NRI rates a hazard "Not Applicable", no federal declaration names it and Storm Events has no record of it since 1996.

Highest expected annual loss (NRI, modeled): Inland Flooding, Earthquake and Hurricane.

Also check locally (not covered by NRI): dam failure (incl. upstream dams), levee failure, flash flood as its own subtype, ice jams, debris flows, erosion (riverine and coastal), land subsidence and sinkholes and expansive soils.

Check your state hazard mitigation plan's hazard list for this county; explain any hazard you drop.

Supports B1-b Location

  • Avalanche, Earthquake, Hurricane, Landslide, Tornado, Tsunami, Volcanic Activity and Wildfire: Census tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.
  • Coastal Flooding and Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.
  • Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather: Affects the whole planning area; national data do not distinguish locations within the county. Confirm locally.

Supports B1-c Extent

Storm Events records for 14 of 20 hazard groups, with the scale, observed range and worst recorded event for each; the others say local data required.

  • Hail: 2.5 in hail, 2015-07-19
  • Thunderstorm Wind: 70 kt (81 mph) estimated gust, Thunderstorm Wind, 2018-07-28, 8 direct injuries; same speed and measurement basis also recorded on 2002-08-05
  • Tornado: F2 tornado, 1981-06-22, 8.7 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 40 yd wide, $2,500,000 property; crops not recorded (1981 dollars)

Supports B1-d Previous occurrences

25 federal declaration rows for this area (19 counted incidents), each with type, dates and county Public Assistance dollars.

No county-level plan row in FEMA data, so there is no approval date to count from.

1 statewide declaration listed separately.

Hazards with no recorded events are stated as such (5 of 18).

Storm Events history: 552 records (notable ones in the PDF, all of them in the Excel file).

Supports B1-e Probability

FEMA annualized frequency (modeled) for each hazard, with a descriptor from a scale defined in the packet.

  • Highly likely: Coastal Flooding, Hail, Lightning and Winter Weather
  • Likely: Cold Wave, Drought, Hurricane, Inland Flooding, Landslide and Strong Wind
  • Possible: Heat Wave, Ice Storm and Tornado

Historical frequency by intensity band (tornado, hail, wind): 9 bands from Storm Events.

Supports B1-f Variation across the planning area

Range of census tract risk scores within the area for 18 hazards (30 tracts; rated tracts only).

13 member jurisdictions: plan clock, repeat-flood count, Public Assistance dollars and event records naming the place (starter, confirm locally).

Supports B2-a, B2-b Assets and impacts

Local data required

County-level starter. The plan must describe impacts for each participant and its own assets.

No county-level plan row in FEMA data, so there is no approval date to count from.

Checklist of what to gather locally: Critical facilities and lifelines per hazard; A problem statement per participant per hazard; Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a); Future assets.

Supports B2-a Context

Population 130,861; building value $22,309,294,228 and agriculture value $13,492,057 (total, not at risk).

National Risk Index rating Relatively Low; social vulnerability Very Low; community resilience Relatively High.

Supports B2-c Repetitive loss

Repetitive-loss properties, FMA definition (44 CFR 77.2): 1 repetitive loss, 2 severe repetitive loss. NFIP insurance definition: 14 and 2.

Mitigated 1; insured 6; NFIP data as of 2026-08-02. Counts by occupancy and for each member community are in the packet.

Releases

Monthly releases are planned (not yet running); files for a release never change. Earlier releases will be listed here with what changed between them. All releases.

Cite this

Hazard Plain (2026). Strafford County, NH: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; County area 33017). Preview: automated baseline. https://hazardplain.org/nh/33017/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Source citations for the plan's bibliography (8)

How this packet is built, its sources and its limits