Alert archive / North Carolina / Flash Flood Watches in 2020

Flash Flood Watch 3, NWS Newport/Morehead City, NC

August 2, 202010 counties in North Carolina

NWS Newport/Morehead City, NC issued this flash flood watch at Aug 2, 2020, 3:06 AM EDT for 10 counties in North Carolina. It took effect at Aug 3, 2020, 2:00 PM EDT. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued
Aug 2, 2020, 3:06 AM EDT (07:06 UTC)
In effect from
Aug 3, 2020, 2:00 PM EDT
Expired
Aug 4, 2020, 6:56 AM EDT
In force
17 hr
Issued by
NWS Newport/Morehead City, NC
Flood severity
None

Counties Beaufort County, NC, Craven County, NC, Duplin County, NC, Greene County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Onslow County, NC, Pitt County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 73 km from the middle of the area, began a volume at 07:07 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

Newport, NC (KMHX), launched 00:00Z, 7.1 hours before the alert went out and 72 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.

Skew-T log-pSkew-T log-p diagram, Newport, NC at 00:00Z on 2020-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1690 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 00:00Z on 2020-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1690 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
871 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Newport/Morehead City, NC wrote its last area forecast discussion before this flash flood watch went out at Aug 2, 12:42 AM EDT, 2 hours 24 minutes earlier.

Area forecast discussion, Aug 2, 12:42 AM EDT, 2 hours 24 minutes before
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Hazardous weather outlook, Aug 1, 11:22 AM EDT, 15 hours 44 minutes before
Hazardous Weather Outlook
National Weather Service Newport/Morehead City NC
1122 AM EDT Sat Aug 1 2020

NCZ029-044>047-079>081-090>092-094-193-194-198-021530-
Martin-Pitt-Washington-Tyrrell-Mainland Dare-Greene-Beaufort-
Mainland Hyde-Duplin-Lenoir-Jones-Pamlico-Northern Craven-
Southern Craven-Inland Onslow-
1122 AM EDT Sat Aug 1 2020

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for eastern North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Tropical Cyclone Isaias is currently forecast to cross near or over
the region early next week. There is uncertainty on the track and
timing of Isaias but all residents should begin planning for
possible significant impacts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ195-196-199-204-205-021530-
West Carteret-East Carteret-Coastal Onslow-Ocracoke Island-
Hatteras Island-
1122 AM EDT Sat Aug 1 2020

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for eastern North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.
   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Tropical Cyclone Isaias is currently forecast to cross near or over
the region early next week. There is uncertainty on the track and
timing of Isaias but all residents should begin planning for
possible significant impacts.

Dangerous rip currents and rough surf will be likely through early
next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ203-021530-
Northern Outer Banks-
1122 AM EDT Sat Aug 1 2020

...MODERATE RIP CURRENT RISK IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for eastern North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Moderate Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Dangerous rip currents and rough surf will be likely through early
next week.

Tropical Cyclone Isaias is currently forecast to cross near or over
the region early next week. There is uncertainty on the track and
timing of Isaias but all residents should begin planning for
possible significant impacts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

Everything else NWS Newport/Morehead City, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 8:05 PM EDTBeach Hazards StatementMHXCarteret, Dare, Hyde, Onslow48 hr
Aug 2, 11:00 AM EDTTropical Storm WatchMHXBeaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more12 hr
Aug 2, 5:00 PM EDTStorm Surge WatchMHXBeaufort, Carteret, Craven, Dare, Hyde, Onslow and 1 more38 hr
Aug 2, 5:00 PM EDTTropical Storm WarningMHXBeaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more42 hr

Nearby

Flash Flood Watches in North Carolina, 2020Every flash flood watch 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.