Flash Flood Warning 13, NWS Cheyenne, WY

Issued

Jun 22, 2023, 5:10 PM MDT (23:10 UTC)

Expired

Jun 22, 2023, 10:15 PM MDT

In force

5 hr

Issued by

NWS Cheyenne, WY

Area

Storm-based polygon

Flood severity

None

Counties Laramie County, WY, Platte County, WY

The Cheyenne radar (KCYS), 63 km from the middle of the area, began a volume at 23:10 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

094 
WGUS55 KCYS 222310
FFWCYS
WYC021-031-230215-
/O.NEW.KCYS.FF.W.0013.230622T2310Z-230623T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cheyenne WY
510 PM MDT Thu Jun 22 2023

The National Weather Service in Cheyenne has issued a

* Flash Flood Warning for...
  North Central Laramie County in southeastern Wyoming...
  Southeastern Platte County in southeastern Wyoming...

* Until 815 PM MDT.

* At 510 PM MDT, local law enforcement reported thunderstorms 
  producing heavy rain in Chugwater. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Chugwater and Slater.

This includes the following highways...
	Interstate 25 in Wyoming between mile markers 42 and 59.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain. 
Arroyos, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4180 10503 4181 10479 4177 10466 4164 10466
      4157 10488 4162 10502

FLASH FLOOD...OBSERVED

$$

Natoli

239 
WGUS55 KCYS 230157
FFWCYS
WYC021-031-230415-
/O.EXT.KCYS.FF.W.0013.000000T0000Z-230623T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cheyenne WY
757 PM MDT Thu Jun 22 2023

The National Weather Service in Cheyenne has extended the

* Flash Flood Warning for...
  North Central Laramie County in southeastern Wyoming...
  Southeastern Platte County in southeastern Wyoming...

* Until 1015 PM MDT.

* At 757 PM MDT, local law enforcement reported flooding continuing 
  in Chugwater. Between 1 and 2 inches of rain have fallen. 
  Additional rainfall amounts up to 1 inch are possible in the 
  warned area as another round of rainfall moves into the area. 
  Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Chugwater and Slater.

This includes the following highways...
	Interstate 25 in Wyoming between mile markers 42 and 59.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4180 10503 4181 10479 4177 10466 4164 10466
      4157 10488 4162 10502

FLASH FLOOD...OBSERVED

$$

Natoli

493 
WGUS75 KCYS 230413 RRA
FFSCYS

Flash Flood Statement
National Weather Service Cheyenne WY
1013 PM MDT Thu Jun 22 2023

WYC021-031-230423-
/O.EXP.KCYS.FF.W.0013.000000T0000Z-230623T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Laramie WY-Platte WY-
1013 PM MDT Thu Jun 22 2023

...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM MDT THIS EVENING FOR 
NORTH CENTRAL LARAMIE AND SOUTHEASTERN PLATTE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4180 10503 4181 10479 4177 10466 4164 10466
      4157 10488 4162 10502

$$

Natoli

Flash Flood Warnings in Wyoming, 2023Every flash flood warning in 2023

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.