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Emergency Information => Weather Info => Topic started by: ThreatWebInternal on June 12, 2025, 06:13:06 PM

Title: [Alert]WCO issues Area Hydrological Discussion (AHD) at Jun 7, 5:59 AM CDT
Post by: ThreatWebInternal on June 12, 2025, 06:13:06 PM
WCO issues Area Hydrological Discussion (AHD) at Jun 7, 5:59 AM CDT

363 
AGUS74 KWCO 071102
AHDNWC

Area Hydrological Discussion #110 - EXPERIMENTAL
NWS National Water Center - Tuscaloosa, AL
559 AM CDT Sat Jun 07 2025

POTENTIAL IMPACTS...Flash, urban, and small stream flooding
WHERE...Northeast Pennsylvania, southern New York, western
Connecticut, western Massachusetts, southern Vermont, and southern
New Hampshire
WHEN...Through this afternoon

FORECAST RAINFALL AND ANTECEDENT CONDITIONS...
QPF...1 - 2.5" (HRRR)
Rain Rates...1 - 1.5"/hr (HRRR)
Soil Moisture...55 - 75% RSM (0 - 10 cm, NASA SPoRT)
Streamflows...Normal to Above Normal (USGS)

DISCUSSION...
Moderate rainfall will bring flash, urban, and small stream flooding
to the area of concern through this afternoon. Soils are wet from
recent rainfall, which may limit infiltration capacity, leading to
runoff issues. Streamflows are generally above normal, suggesting
that channel capacity is limited to handle excess runoff and lead to
isolated out-of-bank rises. Areas of steep terrain may help to
enhance rainfall rates. Urban areas will be particularly vulnerable
to flooding impacts. The NWM Short-Range Forecast continues to
highlight the area for rapid-onset flooding, with the greatest
consistency across southern New York. Lower annual-exceedance
probabilities are rather isolated, but some reaches are signalling
from to 10-2%. Given these signals from the NWM, flooding impacts
should remain isolated.

GRAPHICAL REPRESENTATION weather.gov/owp/operations-ahd

Additional National Water Center products are available at
weather.gov/owp/operations

//JAW

ATTN...WFO...BTV...BOX...BGM...ALY...OKX...PHI...GYX
ATTN...RFC...RHA...TAR...WPC

Source: WCO issues Area Hydrological Discussion (AHD) at Jun 7, 5:59 AM CDT (https://mesonet.agron.iastate.edu/p.php?pid=202506071059-KWCO-AGUS74-AHDNWC)

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