Alert archive / North Dakota / Heat Advisories in 2021

Heat Advisory 2, NWS Grand Forks, ND

August 15, 2021Benson County, Eddy County, North Dakota

NWS Grand Forks, ND issued this heat advisory at Aug 15, 2021, 2:27 PM CDT for Benson County, Eddy County, North Dakota. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Aug 15, 2021, 2:27 PM CDT (19:27 UTC)
Expired
Aug 15, 2021, 7:00 PM CDT
In force
5 hr
Issued by
NWS Grand Forks, ND

Counties Benson County, ND, Eddy County, ND

The radar

The Minot AFB radar (KMBX), 140 km from the middle of the area, began a volume at 19:33 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.5 hours before the alert went out and 172 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, Bismarck Municip, ND at 12:00Z on 2021-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 901 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, Bismarck Municip, ND at 12:00Z on 2021-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
901 J/kg
Mixed-layer CIN
-333 J/kg
Mixed-layer LCL
1859 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

155 
WWUS73 KFGF 151927
NPWFGF

URGENT - WEATHER MESSAGE
National Weather Service Grand Forks ND
227 PM CDT Sun Aug 15 2021

NDZ014-024-160000-
/O.NEW.KFGF.HT.Y.0002.210815T1927Z-210816T0000Z/
Benson-Eddy-
Including the cities of Fort Totten, Maddock, Leeds, Minnewaukan,
and New Rockford
227 PM CDT Sun Aug 15 2021

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

* WHAT...Heat index values up to 103.

* WHERE...Benson and Eddy Counties.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

&&

$$
1 follow-up statement
196 
WWUS73 KFGF 152358
NPWFGF

URGENT - WEATHER MESSAGE
National Weather Service Grand Forks ND
658 PM CDT Sun Aug 15 2021

NDZ014-024-160100-
/O.EXP.KFGF.HT.Y.0002.000000T0000Z-210816T0000Z/
Benson-Eddy-
Including the cities of Fort Totten, Maddock, Leeds, Minnewaukan,
and New Rockford
658 PM CDT Sun Aug 15 2021

...HEAT ADVISORY WILL EXPIRE AT 7 PM CDT THIS EVENING...

Temperatures will continue to fall through the evening hours. 

$$

Nearby

Heat Advisories in North Dakota, 2021Every heat advisory in 2021

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.