Storm Mode: Flash flooding: Pennsylvania

0 warnings total · 0 tornado warnings · 0 alerts including watches and advisories

Current alert feed · checked 16:04Z

Warnings in area

0 of 0 alerts

No active alerts reported by the current feed in this monitoring area.

Watched places

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Map

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked 16:04Z. Data: NOAA/NWS, NOAA/SPC.

Agency warning geometry · no observed imagery displayed

North ↑

Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

Alert outlines: NOAA/NWS; cell points/observed segments: IEM/NEXRAD. A warning polygon is not a tornado footprint.

Lightning activity — GOES GLM

Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.

Public event region Aggregation interval Show density on map

Cached lightning observations have not loaded. An empty map is not zero lightning.

Cached lightning source details and text readings

Snow analysis — NOHRSC

Source-rendered snow depth and snow water equivalent for the lower 48. History changes this snow picture only; warnings and radar keep their own clocks.

Snow field Retained picture Show snow on the map

Stored snow depth · footprint valid 2026-10-18 06:00:00 UTC, picture retrieved 2026-10-18 12:23:04.796 UTC.

No NOHRSC picture displayed on the interactive map.

0 - 0.39 in
0.39 - 2.0 in
2.0 - 3.9 in
3.9 - 9.8 in
9.8 - 20 in
20 - 39 in
39 - 59 in
59 - 98 in
98 - 197 in
197 - 295 in
295 - 394 in
394 - 787 in

NOHRSC snow analysis for the lower 48; see the adjacent source legend and time qualification — NOAA/NWS/NOHRSC’s original picture and legend. No station or address value is inferred.

NOHRSC footprint times are metadata; pixel analysis time is not independently verified. Snow-depth pixels have previously differed from the footprint time. This is modeled/assimilated snow analysis, not a measurement at a place. Unshaded and no-data areas do not establish zero snow.

Snow pictures, retained history and source provenance

Change time or forecast product

Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)

Radar-derived cells (0) · current

Collector checked 16:03Z; feed generated 16:03Z. Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

Station and river observations (40)

Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

K22N · K22N · current · 15:55Z
K2G9 · K2G9 · current · 15:35Z
KAGC · KAGC · current · 15:53Z
KAOO · KAOO · current · 15:53Z
KAVP · KAVP · current · 15:54Z
KBFD · KBFD · current · 15:53Z
KBTP · KBTP · current · 15:56Z
KBVI · KBVI · current · 15:55Z
KCKZ · KCKZ · current · 15:55Z
KDUJ · KDUJ · current · 15:53Z
KDYL · KDYL · current · 15:54Z
KFIG · KFIG · current · 15:54Z
KGKJ · KGKJ · current · 15:53Z
KHMZ · KHMZ · current · 15:35Z
KHZL · KHZL · current · 15:55Z
KIDI · KIDI · current · 15:55Z
KJST · KJST · current · 15:54Z
KLBE · KLBE · current · 15:48Z
KLNS · KLNS · current · 15:53Z
KLOM · KLOM · current · 15:35Z
KMDT · KMDT · current · 15:56Z
KMPO · KMPO · current · 15:53Z
KN38 · KN38 · current · 15:55Z
KN79 · KN79 · current · 15:55Z
KOQN · KOQN · current · 15:55Z
KPJC · KPJC · current · 15:55Z
KPNE · KPNE · current · 15:54Z
KPTW · KPTW · current · 15:54Z
KRVL · KRVL · current · 15:55Z
KSEG · KSEG · current · 15:53Z
KTHV · KTHV · current · 15:53Z
KUCP · KUCP · current · 15:56Z
KUKT · KUKT · current · 15:55Z
KUNV · KUNV · current · 15:53Z
KVVS · KVVS · current · 15:35Z
KXLL · KXLL · current · 15:35Z
KZER · KZER · current · 15:35Z
BDRN4 · Burlington (IN MLLW) · unavailable · no observed reading; forecast context only
PHBP1 · USCG Station Washington Street (IN MLLW) · unavailable · no observed reading; forecast context only
PHDP1 · Philadelphia near 30th Street · unavailable · no observed reading; forecast context only

Showing 40 of 40 listed sources. All surface stations and retained trends · All supported gauges and forecasts

Selected details

Surface station KUNV

current · Observed 2026-10-18 15:53:00 UTC · wind 3 kt · temperature 11 °C.

Station KUNV · -77.8401, 40.8534 (longitude, latitude).

Source checked 2026-10-18 16:00:05.270Z · current.

Station observations, not an address forecast or cyclone maximum wind. Maintenance-flagged, old and implausible reports are excluded by the existing parser; this is not independent NWS quality control.

Retained observations: 39; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-17 16:53:00 UTC.

Observed sustained wind · 39 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Temperature, dew point and pressure trends

Observed temperature · 39 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Observed dew point · 39 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

Observed sea-level pressure: no readable observations.

Observed reports as a table (39)

Observed (UTC)	Wind / gust (kt)	From (° true)	Temperature / dew point (°C)	Pressure (mb)	Visibility (mi)
2026-10-17 16:53:00 UTC	8 / Not reported	340	10 / 0	Not reported	10 or more
2026-10-17 17:53:00 UTC	13 / 18	20	10 / 2	Not reported	10 or more
2026-10-17 18:53:00 UTC	13 / 18	10	11 / -2	Not reported	10 or more
2026-10-17 19:53:00 UTC	10 / Not reported	360	11 / -2	Not reported	10 or more
2026-10-17 20:53:00 UTC	5 / Not reported	330	11 / -3	Not reported	10 or more
2026-10-17 21:53:00 UTC	7 / Not reported	340	10 / -3	Not reported	10 or more
2026-10-17 22:53:00 UTC	6 / Not reported	340	8 / -3	Not reported	10 or more
2026-10-17 23:53:00 UTC	4 / Not reported	350	7 / -2	Not reported	10 or more
2026-10-18 00:53:00 UTC	4 / Not reported	340	6 / -2	Not reported	10 or more
2026-10-18 01:53:00 UTC	3 / Not reported	320	6 / -2	Not reported	10 or more
2026-10-18 02:15:00 UTC	1 / Not reported	Variable	3 / 0	Not reported	10 or more
2026-10-18 02:35:00 UTC	1 / Not reported	310	4 / -1	Not reported	10 or more
2026-10-18 02:55:00 UTC	3 / Not reported	310	4 / -1	Not reported	10 or more
2026-10-18 03:15:00 UTC	0 / Not reported	Calm	4 / 0	Not reported	10 or more
2026-10-18 03:35:00 UTC	3 / Not reported	180	3 / 0	Not reported	10 or more
2026-10-18 03:55:00 UTC	0 / Not reported	Calm	2 / 0	Not reported	10 or more
2026-10-18 04:15:00 UTC	0 / Not reported	Calm	2 / 0	Not reported	10 or more
2026-10-18 04:35:00 UTC	3 / Not reported	10	3 / 0	Not reported	10 or more
2026-10-18 04:55:00 UTC	0 / Not reported	Calm	3 / 0	Not reported	10 or more
2026-10-18 05:15:00 UTC	1 / Not reported	300	2 / 0	Not reported	10 or more
2026-10-18 05:35:00 UTC	2 / Not reported	300	2 / 0	Not reported	10 or more
2026-10-18 05:55:00 UTC	3 / Not reported	320	2 / 0	Not reported	10 or more
2026-10-18 06:15:00 UTC	2 / Not reported	180	2 / 0	Not reported	10 or more
2026-10-18 06:35:00 UTC	2 / Not reported	160	1 / 0	Not reported	10 or more
2026-10-18 06:54:00 UTC	2 / Not reported	200	1 / 0	Not reported	10 or more
2026-10-18 07:17:00 UTC	0 / Not reported	Calm	1 / 0	Not reported	10 or more
2026-10-18 07:35:00 UTC	1 / Not reported	140	1 / 0	Not reported	10 or more
2026-10-18 07:55:00 UTC	0 / Not reported	Calm	1 / 0	Not reported	10 or more
2026-10-18 08:15:00 UTC	2 / Not reported	180	0 / 0	Not reported	10 or more
2026-10-18 08:35:00 UTC	1 / Not reported	310	1 / 0	Not reported	10 or more
2026-10-18 08:55:00 UTC	0 / Not reported	Calm	0 / 0	Not reported	10 or more
2026-10-18 09:15:00 UTC	1 / Not reported	10	1 / 0	Not reported	10 or more
2026-10-18 09:53:00 UTC	0 / Not reported	Calm	0 / 0	Not reported	10 or more
2026-10-18 10:53:00 UTC	0 / Not reported	Calm	-1 / -1	Not reported	10 or more
2026-10-18 11:53:00 UTC	0 / Not reported	Calm	0 / 0	Not reported	10 or more
2026-10-18 12:53:00 UTC	0 / Not reported	Calm	2 / 1	Not reported	10 or more
2026-10-18 13:53:00 UTC	0 / Not reported	Calm	4 / 1	Not reported	10 or more
2026-10-18 14:53:00 UTC	0 / Not reported	Calm	8 / 2	Not reported	10 or more
2026-10-18 15:53:00 UTC	3 / Not reported	Variable	11 / 3	Not reported	10 or more

Capture times, quality and provenance

Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.

Observed 2026-10-17 16:53:00 UTC, captured 2026-10-17 17:00:06.696Z; source body SHA-256 b8be3a3f9dbb0f9d47f7f7d56c511352303f71121022093aee1718b59882e480.
Observed 2026-10-17 17:53:00 UTC, captured 2026-10-17 18:00:07.907Z; source body SHA-256 87f841dd0eda299799ecfa27669c14712906e9b7f2462af1e9aaebc60f5a4644.
Observed 2026-10-17 18:53:00 UTC, captured 2026-10-17 19:00:06.492Z; source body SHA-256 9b92790a99ac0e8c2777442829b2a9236f72d6e831b8d9a0836ca29a9d3acbba.
Observed 2026-10-17 19:53:00 UTC, captured 2026-10-17 20:00:08.337Z; source body SHA-256 b75985c438912b2da4a26e309fc2fbabef235be8a13c5848c5c5d64297850019.
Observed 2026-10-17 20:53:00 UTC, captured 2026-10-17 21:00:07.279Z; source body SHA-256 79c0cc8ae6d502baffa56263b2daf4c86fd1628f11d5a529402c527d0ff32fe1.
Observed 2026-10-17 21:53:00 UTC, captured 2026-10-17 22:00:07.362Z; source body SHA-256 f1fa85855e007d5d5b85e6dbf4575f6d6bfe58fd5c9a7bb6d9e9cc636ec4c3b2.
Observed 2026-10-17 22:53:00 UTC, captured 2026-10-17 23:00:07.092Z; source body SHA-256 2ee1214ad66de98865565d92f21f7f5094d6b2e4ef4f09839341a5e6cd89b61b.
Observed 2026-10-17 23:53:00 UTC, captured 2026-10-18 00:00:09.347Z; source body SHA-256 fe50c177f37463edb2970e7df309ca8243c740fe7f3ba6344704878ab6922ee2.
Observed 2026-10-18 00:53:00 UTC, captured 2026-10-18 01:00:10.019Z; source body SHA-256 949eb463d93270208adccd66994771bf859674b804d78a93f2b1e78571af9b73.
Observed 2026-10-18 01:53:00 UTC, captured 2026-10-18 02:00:07.747Z; source body SHA-256 2a808d30ef24af292625f66ac29ed87d3497f0029e7978811a5214db4d4e391c.
Observed 2026-10-18 02:15:00 UTC, captured 2026-10-18 02:30:10.380Z; source body SHA-256 15a6245beadfd0a8ce6f77aaf2ff42b204b4a2e411aaa89ef6925de72a6b13f9.
Observed 2026-10-18 02:35:00 UTC, captured 2026-10-18 02:45:10.655Z; source body SHA-256 f7c5501ef4bfeeb31f4ebf98fffb35a41d8f1ea4c93568cacb717917c0a2b2c2.
Observed 2026-10-18 02:55:00 UTC, captured 2026-10-18 03:15:10.023Z; source body SHA-256 286048f59de6ba9e40cefa7baf3b30600d840a609330ffdd3c5421c3e015acde.
Observed 2026-10-18 03:15:00 UTC, captured 2026-10-18 03:30:08.591Z; source body SHA-256 5672bdaa00d8e7c67de8856281c396b4883e06cda834c224faa3a626ff6d1bf9.
Observed 2026-10-18 03:35:00 UTC, captured 2026-10-18 03:45:09.489Z; source body SHA-256 ff30b281581e6086665a9b0170982c399149dc2307f678d1c04532064fc0aa5d.
Observed 2026-10-18 03:55:00 UTC, captured 2026-10-18 04:15:10.808Z; source body SHA-256 3208f6bb3bd857b2dec6e5a4113a661211834775509581ca2d816ebbf9290282.
Observed 2026-10-18 04:15:00 UTC, captured 2026-10-18 04:30:08.115Z; source body SHA-256 b945d1dd8082b8fdac9fb06097591ce9e84170b10dcdd2e4fdd962f2b9d6fbb7.
Observed 2026-10-18 04:35:00 UTC, captured 2026-10-18 04:45:08.397Z; source body SHA-256 1981ebf0c9644e8e79c2b29009ee99216868277aa873dc9b808b83c662479d81.
Observed 2026-10-18 04:55:00 UTC, captured 2026-10-18 05:15:08.294Z; source body SHA-256 57652e3f3058d24864856efeb99784611227e7184ee8800c86e3726c5b8f0231.
Observed 2026-10-18 05:15:00 UTC, captured 2026-10-18 05:30:07.030Z; source body SHA-256 846c18882078fc94390c507105ede603df0a14abac3dfdc9e7f73c6b87a50126.
Observed 2026-10-18 05:35:00 UTC, captured 2026-10-18 05:45:07.433Z; source body SHA-256 0768cb322d2c5bf6958ddb7ce2a53d243bd969b5fea1047d24b71a6a5b41a886.
Observed 2026-10-18 05:55:00 UTC, captured 2026-10-18 06:15:09.754Z; source body SHA-256 d6f3e8bcbd73123bac653833e25613be22b44ed899976dd1627107027cbfeb90.
Observed 2026-10-18 06:15:00 UTC, captured 2026-10-18 06:30:07.583Z; source body SHA-256 9ab6462e67c4eb5bc9bba4861248e2cbbd9c65288df1942a8f6764fe2c578731.
Observed 2026-10-18 06:35:00 UTC, captured 2026-10-18 06:45:08.757Z; source body SHA-256 d4711d6703b86d9ea514fec4b95bcb3555271ef53e955aeb3ccf01ed7e9bb620.
Observed 2026-10-18 06:54:00 UTC, captured 2026-10-18 07:15:08.677Z; source body SHA-256 faedea1b22dd965e600368b0420535bdc8168cf37050ce6169b899861ed12bb6.
Observed 2026-10-18 07:17:00 UTC, captured 2026-10-18 07:30:06.796Z; source body SHA-256 74b102d64c1c868841354fbe7a693afba78dbac9ebb7f03d8570e756b2c2130f.
Observed 2026-10-18 07:35:00 UTC, captured 2026-10-18 07:45:08.639Z; source body SHA-256 9a7c7093b2467d1caafe5fbf37862b14188b33d6d26d7dd98ffea259aca6468d.
Observed 2026-10-18 07:55:00 UTC, captured 2026-10-18 08:15:10.046Z; source body SHA-256 c105473f85541105b2b2ba713894a297f735b802f44ac710a7f6895b8e510ef4.
Observed 2026-10-18 08:15:00 UTC, captured 2026-10-18 08:30:07.963Z; source body SHA-256 abda48cfec1b2ae69e44a795568c94dd13b85c9cda6ffbd700d6cc1ad8e661af.
Observed 2026-10-18 08:35:00 UTC, captured 2026-10-18 08:45:08.723Z; source body SHA-256 b94480e0282948857cb50e32abb0929b9c8b46e37658fe5c106712311ab0bc33.
Observed 2026-10-18 08:55:00 UTC, captured 2026-10-18 09:15:09.950Z; source body SHA-256 38ceee19f00ccb01570c5d4cc642842509bbe62ff24e8bdbec40a5abbd00e862.
Observed 2026-10-18 09:15:00 UTC, captured 2026-10-18 09:30:07.695Z; source body SHA-256 a58900ae1657c840a58570bc15d806cba8e5821b7206d1f20bbfe60247d2272e.
Observed 2026-10-18 09:53:00 UTC, captured 2026-10-18 10:00:08.135Z; source body SHA-256 7088f7a20b608392c60688c0c6cc24bb874f518a9d855a8f279a1656aa963b5f.
Observed 2026-10-18 10:53:00 UTC, captured 2026-10-18 11:00:09.217Z; source body SHA-256 4c9aeddeccab4a18ef736d7fde43bbf68e646f4e3dd3672a819a2d3d41e31ffb.
Observed 2026-10-18 11:53:00 UTC, captured 2026-10-18 12:00:08.069Z; source body SHA-256 99d8a01a4181fd6dc5a6f38379f01ddc13eb1176afbc54835f8b9e2d8864e444.
Observed 2026-10-18 12:53:00 UTC, captured 2026-10-18 13:00:08.827Z; source body SHA-256 099a919970c81c196850e485719d2befbfd218b45455920c630e4665158be4f6.
Observed 2026-10-18 13:53:00 UTC, captured 2026-10-18 14:00:06.781Z; source body SHA-256 d5bb4158d51e4be8ae455671d404663bf3c089899145baea8f175a4f02ee691b.
Observed 2026-10-18 14:53:00 UTC, captured 2026-10-18 15:00:07.750Z; source body SHA-256 fb3f3094c11b10dd11208847ba057d3a914f9c474065557688b031827858eed4.
Observed 2026-10-18 15:53:00 UTC, captured 2026-10-18 16:00:07.010Z; source body SHA-256 1a64a07f010d8deb579f76e936259499ecd9299f0a3027594b291930b1b61c4d.

Values use the decoded station report. Null means not reported, never zero. Gust is kept separate from sustained wind.

Observation source page · Cached readings as JSON · Official source

Recent source changes

ero-day1 · source-revision · 15:51ZRecorded 2026-10-18T16:00:08.403Z
ero-discussion · source-revision · 15:57ZRecorded 2026-10-18T16:00:08.403Z
metars · source-revision · 16:00ZRecorded 2026-10-18T16:00:07.010Z
hrrr · source-revision · 15:00ZRecorded 2026-10-18T16:00:07.010Z
radar-alerts · source-revision · 16:00ZRecorded 2026-10-18T16:00:06.984Z
radar-alerts · source-revision · 15:56ZRecorded 2026-10-18T15:56:04.120Z
office-afd · source-revision · 15:55ZRecorded 2026-10-18T15:55:05.465Z
radar-alerts · source-revision · 15:46ZRecorded 2026-10-18T15:46:03.211Z

Recording coverage and limits

warnings: retained from 2026-10-17T16:04:34.115Z through 2026-10-18T16:04:03.209Z
outlooks: retained from 2026-10-17T16:04:34.115Z through 2026-10-18T16:00:08.403Z
hydro: retained from 2026-10-17T16:04:34.115Z through 2026-10-18T15:55:05.132Z
analysis: retained from 2026-10-17T16:04:34.115Z through 2026-10-18T16:00:07.010Z
winter: retained from 2026-10-17T16:04:34.115Z through 2026-10-18T15:53:04.501Z

Source-message history is not recorded imagery replay. Recorded radar/satellite imagery is not available in this view.

Checks every minute; each layer keeps its own time.

Spotlight: Flash-flood risk, Day 1

1 of 4

Flash-flood risk, Day 1

Marginal

WPC’s excessive rainfall outlook, 16:00Z to 19 Oct 12:00Z, issued 15:51Z: a chance of flash flooding, in four categories. Data: NOAA/WPC.

River gauges in flood

0 major · 0 moderate · 1 minor · 1 at action stage

minor USCG Station Washington Street (IN MLLW) PHBP1, forecast

NWS’s gauges at flood stage or above in the area, worst first, each with its forecast hydrograph on Rain & rivers. Data: NOAA/NWPS.

Rain expected and rain that fell

WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.

Open Rain & rivers

Data: NOAA/WPC, NOAA/NSSL MRMS.

Radar

NOAA’s radar for the area, loaded by your browser as on the Radar page.

Open the radar

Live tiles; the radar keeps no last-good copy.

What changed, last 60 minutes

since 16:04Z, when this server began watching this area

15:51ZWPC excessive rainfall outlook issued

The products’ own words and times, and what is no longer in force since the last read. Never written by AI.

Monitoring area, legacy alert summary and selection rules

Area: Pennsylvania (NWS states: PA)
Hazards: Flash flood warnings, watches and advisories, and the forecasts for them
Window: In force now, with the next days of SPC’s and WPC’s products
Made by: This address: anyone can make one, and nothing is stored. Change the area or hazards

An area you chose, not a storm’s footprint: everything here is in force in this area, never “from this storm”.

In force in this area

No warning, watch or advisory for these hazards is in force in this area.

NWS’s alerts checked 16:04Z: a successful check, so this is none in force, not “can’t tell”.

Sources

NWS warnings and SPC watches checked 16:04Z
NWS watches and advisories checked 16:04Z
WPC excessive rainfall checked 16:00Z
NWPS river gauges checked 15:55Z
Radar live tiles, no last-good copy

Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.