SPC May 12, 2025 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0741 AM CDT Mon May 12 2025 Valid 121300Z - 131200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN MONTANA AND NORTHWEST NORTH DAKOTA... ...SUMMARY... Isolated severe thunderstorms are possible across parts of the Southeast today, where a tornado or two, localized damaging winds, and hail could occur. Isolated severe wind gusts are also possible in northeast Montana to northwest North Dakota around early evening. ...Southeast States... The persistent vertically stacked mid/upper low that has been nearly stationary over the Sabine Valley/Lower Mississippi
Hydrologic Outlook issued May 11 at 8:26AM AKDT by NWS Fairbanks AK
ESFAFG Based on ice running by Galena for most of the day on Saturday, it is likely that the in-place ice from the Boneyard to the Nowitna River is getting pushed out. The river is open from Ruby down to Kaltag with continuing ice and ice stranded in shallow areas. In-place ice remains several miles below Kaltag as of Saturday evening.
Hydrologic Outlook issued May 11 at 8:25AM AKDT by NWS Fairbanks AK
ESFAFG The river ice at Huslia lifted on Friday and is thermally degraded but in-place down to Winthrop Point. Below Winthrop Point the river is a mix of degraded in-place ice on bends alternating with open stretches to near the mouth which is open for several miles upstream from Koyukuk community.
SPC May 12, 2025 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0743 PM CDT Sun May 11 2025 Valid 120100Z - 121200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN EASTERN MT AND WESTERN ND... ...SUMMARY... Isolated to scattered severe wind gusts may persist across parts of the northern Great Plains this evening but will subside tonight. A low-probability wind/tornado threat remains apparent across central/south Alabama to the Florida Panhandle into Monday morning. ...Northern Great Plains/Rockies... Isolated to widely scattered thunderstorms are ongoing across parts of the Rockies and northern Great Plains. The most likely
Hydrologic Outlook issued May 11 at 11:18AM MDT by NWS Billings MT
ESFBYZ Expect very warm temperatures through Monday. Enhanced snowmelt in the mountains will continue to increase flows on area rivers and streams through the first part of the week. While flooding is not anticipated on larger rivers and streams, there is a chance that some smaller streams could reach bankfull in and near the foothills, producing minor flooding. At the very least, stream flows will be much higher with the increased snowmelt. Water rises will occur first on small streams flowing out of the foothills, eventually arriving on larger rivers and streams. The rate and magnitude of the water rises
Hydrologic Outlook issued May 11 at 10:18AM MDT by NWS Great Falls MT
ESFTFX Despite cooler temperatures expected this week, the recent string of warm daytime and mild overnight temperatures has spurred an increase in high elevation snowmelt, resulting in within bank rises on some creeks and upper tributary rivers near the mountains. Scattered precipitation through Monday may add to some localized runoff but widespread precipitation expected to develop across primarily central and southwest Montana Tuesday and Wednesday is likely to fall as snow at elevations where a lingering snowpack exists. Significant rises are not expected on larger rivers, but some creeks and small rivers in the mountains and adjacent foothills may reach
SPC May 11, 2025 1630 UTC Day 1 Convective Outlook
SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1119 AM CDT Sun May 11 2025 Valid 111630Z - 121200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES AND MONTANA HIGH PLAINS... ...SUMMARY... Scattered severe wind gusts are expected across the northern Rockies to Montana High Plains from mid-afternoon into the evening. Isolated severe thunderstorms are also possible across the Southeast today through tonight. ...Northern Rockies/High Plains and northeast Great Basin... Strengthening southwesterly flow aloft is anticipated throughout the day as the upper low off the Pacific Northwest coast progresses
SPC May 11, 2025 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0754 AM CDT Sun May 11 2025 Valid 111300Z - 121200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES AND MONTANA HIGH PLAINS... ...SUMMARY... Scattered severe wind gusts are expected across the northern Rockies to Montana High Plains fom mid-afternoon into the evening. Isolated severe thunderstorms are also possible across the Southeast today through tonight. ...Northern Rockies/High Plains and northeast Great Basin... The leading portion of an eastward-transitioning upper-level trough will overspread the northern Rockies and northern Great Basin later today
Hydrologic Outlook issued May 10 at 11:54AM AKDT by NWS Fairbanks AK
ESFAFG ..Middle Yukon River Breakup Status... The river is open from the Nowitna through Galena with the exception of a small (
Hydrologic Outlook issued May 10 at 3:51PM MDT by NWS Albuquerque NM
ESFABQ Risk of areal flooding and elevated stream flows from rapid snowmelt ...EXISTING CONDITIONS... Recent storms have brought several inches of snow to mid to high elevations (8500'->10500')over the Sangre de Cristo, Jemez and Tusas mountains throughout north central New Mexico. This snow pack contains on average 2-4 inches of liquid equivalent. With warming temperatures expected over the next 48 hours, these regions are vulnerable to flooding from rapid snowmelt. ...Temperatures... There is a greater than 50% chance of temperatures greater than 68-70 degrees over the snowpack. These temperatures along with the relatively high sun angle observed in mid may